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 0x3c13d9fdf9346e99fdf21c97f596dc9d99189dad53e8a1315c1b77c45e69599d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/240ea698-b75f-434d-8abe-db96785a3605.json and https://artists.proofprofile.net/proofs/artist/240ea698-b75f-434d-8abe-db96785a3605.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 0x3a7e8175787fec699e84994c76be7c2e5cdec69f7f7968dbf9f85f4621f96ef7. 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/TCADT1868983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484977ef6e4b02380f511b9226f1da08180f6b80ceba5f8c4719ebb6edf7769d. 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/TCADT1868986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d4396746b943566749500344c69af0fcbbc2ec97705eb199879342aa568b5b. 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/TCADT1868989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e654db87893e0d19c4bee3583f5bfaf60ae6cba6468f45a74a261e04a2f9afd. 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/TCADT1868991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894e60f6dc1c7055bd2fc9593922cfcdd2ec9e21deae64e6d950a072f1702af7. 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/TCADT1868993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f66b9604cfaefbb030fe048e138af4481222b7314854532c677b9e51cd6f9. 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/TCADT1868998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7deefd522c9b96391c74c64fcbe28a78e500e2d6f0be943343d0aa2137ebbb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADT1869003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259cd4cc67384e948b6c670c137e922bffd8e8aa980a05390ec2cf9d25a432f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADK1722876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a58002baf1281412edd8a834571f8a6777dc6b626f8585d40e8b9a637914762. 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/TCADK1722820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d734991f97c9e8f5b945ce246ae1b93bb4f936079dd51316ef076a287469f. 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/TCADK1722874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b67da6eda3d791fa37927f7cebc352ae4c6a73faa81ec0689a7b3581272de. 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/TCADK1722880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa243366d73e396183ad45663f13b5fecf1ca01137d97248784230c74fe5424c4. 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/TCADK1722869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ad3758f081a2c2ca67ca1d10aaa9cb477f97b84e95f42bdd7e6fd27b9c299. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADK1722863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfed134f5d37fcbd2349dc6fed3c8b213e03897ff27d1042a294dba53e873fd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADK1722857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be351ea02276e255829b3fb2430262604d49a12e41856c365e600c5b765aa32. 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/TCADJ1708913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1c41e3780a27e0d5186d831cacf6372b34b63db2d8d66402924fe9053aa932. 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/TCADJ1708920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca5f181530b697329ac037a2af719f385cf0ea10a8b6257f03964c59f42311c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCADI1728259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7250bfb3bb38049e0c037e5a2fcf003ee830789684032a6e983e7e3656dc4e. 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/TCADI1728271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e9d96e745a16a8bcf721bc4118c70b78f6a1a5a9236328379a207766e8342. 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/TCADI1728273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8014107f420fe7676e1e91a1fe73013faf4321510d69479b1eb45d5a9f597f9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCADI1728250.
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 0xbe922276ac28fd748ad0fa7f0a48e8341680c6f77a3319930fca21180618b652. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADG1747088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c9cb91a51cb5e8ed554bdcdd605afe6f807ee95690cc87b62adc506b590f6c. 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/TCACY1758656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd86626f9b2ee61bdbf5cfc992a94f0241ace9a0358fb3844106c53c2dc9a80. 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/TCACY1758671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02c9421c4db003612d4ae8813bc4277caec9f75d882d7005cb32c6fbb58e5cb. 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/TCACY1758692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53927aa6d8c4b97785464b7e0d763da9f1511267ad0bc9ba3c4003d06095153c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABC1194564.