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 0xc2707f650e6cbde316761e52a9dd7ae693b50c9cbbf6be28434d1f56bba5e504. 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/2dd1d214-3234-461a-9df7-523158c43522.json and https://artists.proofprofile.net/proofs/artist/2dd1d214-3234-461a-9df7-523158c43522.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 0xac88939dad5ce2626919fb972647eac8d64f768a0f49a0ef9b6411d6016b710c. 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/GBBAD1400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958e61c3f6c03016ad571c77dfa8a1b6fc74bc18163fbe3a1e750a73a24536c6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:12Z), 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/GBBAD1400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949ba5f2c7d9c05be48e65505849e406734f28ed8738c37888166c716f27a8a2. 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/GBBAD1400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e96bcbbefdda316d20606454d26c86f54550cfff64561202f951b225f3fc2c. 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/GBBAD1400276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f14747266d9a155ba5bcf9a0930f53e60508b63c16dcd7c35a0e3a9a21556d. 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/UKPJP1900001.
Up in the Morning Early / The Christmas Road
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948a9409a7bfa422c95a4ef2430e3b46815738e4f0354e3ea8427a9b7c440176. 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/UKPJP1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb391dfe6f818664e757b29689024918d6ecaf888297dcb83399f39e592f223b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKPJP1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3f59e3954f6c523757cfe9d84fade6e3688dfe06cdb8c920d800bad8c47112. 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/UKPJP1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25520334f19c7d9b6dae65c75307e6142c482001beb0cb035773fb08d5be70a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:15Z), 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/UKPJP1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af04ec453dba4bcf0618802cd4cf1a209f2e6e8192198acb31af60015af1a47. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKPJP1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e09081c54b2c3bcc7fcfb2cc80a9c25728751dfd7d6d783bdd4ec622d7a92. 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/UKPJP1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace840894654bb02d6c76740f0a8f6a2dfa8f5c51fc20a634cf1d0fb17a8fbff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:57Z), 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/UKPJP1900017.
Stand Up Now (Songs from the Landworkers’ Alliance.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696db460ea40e18b277b1d731cf617b726a161d95be81682590d15327c4cbdc5. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/UKPJP2100014.
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 0x8736c0d03f1bab131ca41bdc6c53be3d52d5acd500a01ec3652460ee01bb0123. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/UKPJP1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa15eef8cc9ca53a24ac4a07063fde19f888b7979de3385fd78130273008a32e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/UKPJP1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5e86149ebedaff2297ae4132be536d639f5a8b188e5fb5b853caa5d9528191. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKPJP1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeec96c2525b1e8899d3e7a5d55a72385b5f11c42799d3673db2428642759c0. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/UKPJP1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e0f9486510481e19b878681b6da67d03b90d40ca7d6feaaea4b591c57726a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/UKPJP1900010.
Da Day Dawn / Like as the Thrush in Winter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43fc97d8c69778b20ecfefe5f7ef29d1c2df009562bc65cd4c14e84c4e9cf7a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UKPJP1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23536e9e2f65765fc8a9fd9155824088472d4c4885f2155f3da4462dcc93e2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKPJP1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfbe2b1f00117958efd3c8f9431f275a319b10422d90e207cb3bd1addeb1ded. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UKPJP1900016.