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 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 0x2f772ebc3f0cf6a1734b7812b6ba40dc5e8c72cf9987af1787e883271bcd0868. 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/34f12b58-f9d0-4e69-9d01-e2754c9ac4be.json and https://artists.proofprofile.net/proofs/artist/34f12b58-f9d0-4e69-9d01-e2754c9ac4be.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 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 0xcd6c12f7b98f59919b0f61cb4c11cbc9241ecd0fff56bd48845ffe4c57a29d03. 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/QMBZ92466900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221fc5cc9e37491e25f63d32488731111958e200d101be9c0c3639ec4c85d0d3. 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/QMBZ92464482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d751df0b29f542169226f059570d96b9d0954f7bd9d719b3753677a6253be. 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/QMDA72202925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20a3921a5ea4f24a077b12f2201ebf9a2cc50b9f579801e50dd3e431bb6b91c. 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/QMBZ92466992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd3c97b238f7372fa3cd67b5d6da6ebf2bcdf5d39993265b9ad889b852a783d. 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/QMBZ92464487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d4c49d21a09ca63ced624c3b5817eed0ba63e252274b716f250d74671c123a. 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/QMBZ92464490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7833809f23da70e90308e06016c55c0061ff63e87f70e4055bcfe7f1217606. 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/SE66N2344481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439298cf2ca6685b389d5035785be1e4a0c0273ca626b967546b93f74e2b04e8. 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/SE66N2302986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41b2d5a0e409f4ea581f7cea89f61112599d040126c4e36bd746ea93d4c9d9e. 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/SE6SA2333829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7726e17ab454c8172accd7e0b1f56adf335ba03d8d50af4b76c9e82cb6d6811e. 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/SE6A92363172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbca70fcf3054128317b88dd0ca933cb66e4ddde6b8086c41043f632114b101. 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/SE6HN2333646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa97ae36c069890ff630fbc867f672ad6fe560d0c5791306028c85b99255b6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE66N2329403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ec0e89bf8b8689e63449ffcf8b2d4b641b7326beb207e6a148f37c4465993a. 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/SE6A92328270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a15dac7ffe842f6a5018fa36c77ec5ab831b9e3c164a3463eae2eaec29ceb72. 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/SE6XX2361872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c84cfc9eda7e4ac3e7ebb5660342e8b65a91f7bcf28ba260649ee34afc67b6. 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/SE6XX2314912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cacfcc88d262714dd068a11c7e27c1b51e43458f5d4ea35eb1e8831107be606. 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/SE6XX2385157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18c54e7dba4b8ab114fbb1720e6a2ade8976a2cefa922e14aad36fc7a362d62. 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/SE6XX2341109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41871569224f6ded4b9a1a1500f67ac28ed83f26d6091f4b07593b6cb27c7407. 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/SE62M2370471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c8d99df6348a116f1714325090e8b4940610b479832ba629cda60ffc70748a. 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/SE62M2231529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5de9734cb151c4efcd6507fc34b9b3accbb2ed69cb0f35f676343754a9e6f3. 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/SE62M2231530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4317d0b76de4a2b79aabd0a687919d4f5a55693bf97292cb16b15d1d30a5cee. 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/SE62M2231532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801d16c361d0c7dcf20dcb15f085a92b4e04edb7bb7619bea5997c019afb98ed. 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/SE62M2231533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ec979c5e49e81e1efa97f8ec908bdba665eb24ae3a6de81ae89d79e90fa84d. 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/SE62M2231534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643009ef0e06e85e8d4c5f300ab41f9b0e7d7fb6b7c6b71828640ff4f8b64ff0. 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/QZK6F2294171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693566c6908d29a30ddc3a35805a67078bd19577fbff11afd9eb1cf1cb8e9508. 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/SE6I32474255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d231f3bb8f196ec655a573e7e2c0a416d457892671b85de78caa33ebdac3d0a. 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/SE6I32474256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2324fd1c8e6213188966bc6433dbccc7178d1de59e8e9b8ab44322cefcd27. 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/SE6I32474257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784662362fa44a6ef4433b383b1120b544b963d75cc6b2385a075ff9894da258. 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/SE6I32474259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5d63f12a6fdc345bf6289eb087663231156b612a7fa16ffbb4bf400b47f079. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:38:27Z), 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/SE5752472694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd72314bdc26fe6928b8c2e552600f846cf5f1c63420aa0b3884a053a38979b. 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/SE5BU2499747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46f26ec8d1ec6f60daf19b4b651e53d48dd85e87bf20349107836d1447a48d7. 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/QZXLZ2513203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e11f9458b5c7ae5df37a8e28c6ed8251d5a54986852bc6f05873b1bd951a93. 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/QZXLZ2513204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0a196fda344d267352ac3e3962559a9ac75c8fe629c5379637e05a3acbbbf2. 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/QZXLZ2513205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b94d4a56386be643930ca39774e59c0d1823f41c70a14414270407a4c08a6a. 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/QZXLZ2513206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8810c50707009bb5ceddbd01dbc49f2c3d3e2d33f5093a362e14eff308de3c16. 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/QZXLZ2513207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd979bc720aa599dbdde814dd0899005806e2ddaed78fe125703bf4b91f485d6. 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/QZXLZ2513208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690a141b0173feb8d93c5b1c01b7d5b23ab9ab940d2351f795f1da95f6e4bda. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE6HN2445839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4271dd29fbcba214201f1db274f6bd9745d4e97b52bf686ca5016aebfa78247e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:12:19Z), 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/SE6HN2445852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3dda7334af7b2aa95399cffd2ed39a75c311da8f48c0697d2765eee908ffa0. 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/SE6XX2520169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d3ccae81c38aa26d29d295a628811a850ce63fc923fdda3ba669f720698a4. 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/SE6XX2510304.