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 0xcb4f25e1714e54b67109606c619f8c1b02172105a676fad857f604790daa807d. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad76405b-52a5-41a7-90f1-1e5c5bca3424.json and https://artists.proofprofile.net/proofs/artist/ad76405b-52a5-41a7-90f1-1e5c5bca3424.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x85f562406bc81e180e80e5cd5134265754db4e5366f97ce1cb726b97814f8977. 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/DEU671501350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3515734d454b20db81efc38017a2d8e5c55fb4d3305e94c996a527663cdb33e6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU671501353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391169f452303bec9db4bb667664e5ecdab2d4debed8ff55d8c5721982b17589. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:32Z), 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/DEU671501351.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff675501e884e33fddcaaddf4f5d785fad48da0d5e17ca10adf3dda7fd34c08. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRU701500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8305ef3a4f1af22eaf5b8c9f3b362045042a07da6c864b40f996b0fa9ca1344. 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/FRU701500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e112869620ae4f7b43a2fb64b4dcf15c13cbfd8e6aba95a3f15c9f1501a5f5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBS3T1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5166950928b82651016b8a87c2fbc28c2729f44ce50aa726388aad730fa5c040. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRU701500061.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b8174f1dd76c9a1d7d9c0ddb2f432ccb32e37d2002f2482dad744473153ae7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL1562335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f31b7963b3498ba2fba9ac5f1479ddae27ca100a2cb789ddd9ee036c3e8eaa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUCDB1500641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e4005bf4f184e0e693b0bfdd4c24ab2ad714b995958bf13067dbab4267704f. 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/DEU671401621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe127d1f4efcc744d1717f6d45209d486c574030feded4b302b5c15c57f0660ff. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBMKA1486376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4d04ef632fb83e19464526ec23d7d2818ad24ba1b966737666c568f5644845. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:22:42Z), 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/FRU701500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb821ec2c33b980b196c144071413a66e079ef45d44c8f1dd43751f41027c39c3. 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/USA2P1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff8d9f135019d167f79b79f171acbbf81ab58d6009f15a64c4495bfb1e224dc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P1900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde4d3073e3584e715b38461ab7b7098c6f394de16acad27a74efb5dc74ee86. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKACT1932057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b19ab8861863cece5db191cb6dc420104547aa28fe846074ae5ebfa64ef4d05. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/UKACT1932054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291e6a4398c6f4e7f602c09c9e1173266c82a9d9007457aee29db939cb4d5a62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES51987572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ff525d7aa9dc272f32b0da8becb1f14314a59da63b30774228ac652d9fe6b7. 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/FRP9G1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c29aad3a55ee292aa1461c0d3814f0eac44b7fee517a02e03d3ae8f2be3283. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRP9G1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4f7163cd4b34c9e621945572cde5c17aee55a1c5c601b1a218ea64994ddfd7. 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/FRP9G1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a609f3634c45ac98e2bcf1c415c7a1a5bf786922b4541c0552f837d83eaf8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRP9G1500002.