Au Revoir Simone is an American indie pop band from Williamsburg, Brooklyn, New York, formed in 2003. The group is composed of Erika Forster (vocals/keyboard), Annie Hart (vocals/keyboard/bass) and He
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ef4afc571af777aec61c758aea02a833deb566d3ccf0327b1cb52e002736c7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b5deca0-31f7-4840-8555-312ce3a23ba0.json and https://artists.proofprofile.net/proofs/artist/2b5deca0-31f7-4840-8555-312ce3a23ba0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verses of Assurance, Comfort and Salvation
Verses Of Confort, Assurance & Salvation
Verses Of Comfort, Assurance & Salvation
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d18044a2d2a4e502c76bf1d6f54d6b896b339be325decbeb858c728c3cf25. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0500053.
Verses Of Comfort, Assurance and Salvation
Verses of Comfort, Assurance and Salvation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d18044a2d2a4e502c76bf1d6f54d6b896b339be325decbeb858c728c3cf25. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5f077c1e6c953563962693d7622516e11a4d6f39f43ce77a19c937874435f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c3326ac81b350a62107a52367a55536828fb1d07e9679ca92faa9fa212a517. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA370676719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997dd6a8655a70532eed0553b14aa91f49be43c8ca795f0cc7e681dedb9c736. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf220387c9d92234a481d3c5424dfbbf51aa2047f3b87951cd3331a5e5fde7d0f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:55:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5f077c1e6c953563962693d7622516e11a4d6f39f43ce77a19c937874435f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadafafdd0360de59bf52cfbb79e17ce977ab48d08326cb0d8971507f9527ce8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66444efa8d59faefd77f8f714a19e021adda6a96254e1ed04f47030f8dcdbffc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560621625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9166ac650e1c0ebf4a2075993197dc1b086f33d03cec921d95b4d127d734f5ae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560621626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8cd3463cf643d3c549961b93653981536d9eb663cd85c829a9523e4be105a9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560621627.
eMusic Sessions: Live At Urban Outfitters - SXSW 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f23a4c6c7a9ec743e11fd7cbffc494c8680f19a1dffc86a1835a5c8c4eed9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103f959cabd3aabb40e31c8a5ec3ca70615978a0851b5031ced33868333db7f4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80774098a6d5ef44200779551f8f5448de9e00f7adc35291d505919bb581688. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc49be212c310e0c2286edd71d2e9ddd2030cb56c45f6d0bc1ede01b5f89cd3d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0900048.
Still Night, Still Light (Standard Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f23a4c6c7a9ec743e11fd7cbffc494c8680f19a1dffc86a1835a5c8c4eed9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc49be212c310e0c2286edd71d2e9ddd2030cb56c45f6d0bc1ede01b5f89cd3d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY0900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0510cca2b98885614c91356e166769cc9e5e30f1fb347527b7c00a224d771a1. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560938602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca6c89ef86b8139a5ca5e79b87a48a1c50316615dbea67eb4dbe11d45245dc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:11:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560938605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25348510b0b5390784edbadcfb1b4370a908b6c2a5b580eb1df04690487ca2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560938609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421c60fda73fef476eca443767c7029ca66aea8cc0177c29714c32f98f5be22. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560938610.
Another Likely Story - Neon Indian Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25524b3830952e48951163e7d418002c2a647e95a01ea5fcaebcd7b52d7c118. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6093101ec0095cbbce40272a02cab626e16726402daf4b2f8e6cc10322d0120. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464967494d041271a04f60931aa88be0f88809e90b8cda491bbc63107e01a687. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83a6c5991cdc01f568c2d7c8c4ce3dba54cdafe9ed95e953d91d284573611c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b53dcc548223f09e4197d76ef91b957ac2e6b83679b4308bc69e52dea530cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc454930665832b1c76717ab8bfdad9641f8c7f896b78a2979be041ae6b43be3d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA371087538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635185668612b4a47b43078a9db4f62053cfc6e986c35bc098635e32696005d9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6cd1d25726a274a5e6710899e4d09abf67e7b9350d93e40ee67742f8b55169. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12644513512af82561353d793c7ef7e7de28906b074d81267e2753f76f03833f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME1393703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d2632e5c75bca913f7aa1ccdfa6673758aa74e5fe3f94220e80bb898504d4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME1393705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc74aafc0221d5c363cdbebb2ad4a5bdf9ba7b6d50fa97519e7a1e8bd563d70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME1393710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471ab27e6a13ea9f7d7b99ab50fc162f2ad20b74bfc32b3a7d2978165fc24fa8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGEY1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c9a6d8ffcb6281786556b35fb5f91ba46bfe85016894bc96f0eb16043e155. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBKS0800406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c9a6d8ffcb6281786556b35fb5f91ba46bfe85016894bc96f0eb16043e155. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBKS0800406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6333355f0e9cca56547f5140ea95ce9ea6c293893653c30f087601aae8b34ff9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGNS1000676.
Paganini Rocks - Extended Club Version Vocal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1625b8e7159f43f8e2ba6efac23ca9ce56fc00ac73bb30007229fcf5a08682. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGNS1000678.
Paganini Rocks - Tom Hodge Original Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2927a678eece2268430733c87b8e79f4d375e2bd79c04e95ceb18ca63e719e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBGNS1000686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268feadd338a4de4c6a18110a8e277f479ba31757a3759a00a6f3e6bb9c52b2a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU700500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b26f3fbdaef521953286b970544749052a578daac635fc901272b95d841adaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG930810354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd4a85a8d2cb0d657a114806895ffa67a292dfd6491de0aff6c5e66a9020ced. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USKO10701885.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch