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 0x1a30d4f0d1f53c46f96c5586f8c8e63b9463d3c0799fbde4fd23ad66a5aaffc1. 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/29c32d00-916b-4e56-9154-8383f847b832.json and https://artists.proofprofile.net/proofs/artist/29c32d00-916b-4e56-9154-8383f847b832.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 0xc44182b197b78eedf4d64e0e9b3940a39dda5dcb2228d6e8d68f1a5a145cbe89. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/CA5KR1578768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928afe0d653dc346ec19d65c841fbf5a7030d07a36a696c81d3cdda71aa84d7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CA5KR1578770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfd659ed47ef0854e14b895ed1f5632032b4acc6c180901a256b48eaa2f9539. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBPWR1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be79d459428dd72f85a465db3b6b58bfda6d9a9ed9eba8fbdbe644dd30665ed. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CA5KR2022502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f45916c6cf8c36baacd2938006aa647944d3a94ddc7a511899a73e0bafcd010. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBPWR2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3f77e0bedf1bc92ba37310e31175805de80cc219486452c7604f48e1cea700. 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/GBPWR2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75205f0209b4f1cb4259eaf9b6ab64703107e3bf9626e59573ea5335b7973394. 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/CA5KR2133860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e145550757c83877d46bb37da43b733607e774234d41451fa75b1c4b152a2a. 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/GBPWR2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25fb1c4d1706e4db2ab19f666cd99c3e16469dd7ad295cc2e744fe54a0579d8. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/GBPWR2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c743c12ddee48fcca48305a8d8f8bbab97a02d1ac4ae77fa8ea5548dedc69bd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBPWR2100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f98f265af431946a8b9d6d11a5d9caca1e7d93ee5abe56758fc75bf7070575. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBPWR2100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0e77453cccfbe721092593a26ceca7871ac8a3d8d89d5dab35c7e097f31669. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBPWR2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04ab985810c46ac7f3b0ccd58fa852ce8679b99368b9c4974e04fefce32453. 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/GBPWR2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a318ce4fdc64c3f41c9ff45ac3d084f82cb892d3158f5e61d795f47777c5c95. 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/GBPWR2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932c24a1e907f5009835fb8bf45ad5044a31c3b258e759595bea0a2547554992. 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/GBPWR2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a821e191d51a20426cbe27c8a4507a0cc66b85c8b08934b631c795aa772086e. 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/GBPWR2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248f157fc9fa1659c60cfde65bdce4a7bbd2330265f7f58955317ccccd74eb3b. 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/GBPWR2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a318ce4fdc64c3f41c9ff45ac3d084f82cb892d3158f5e61d795f47777c5c95. 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/GBPWR2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ef040f6b2126c4216b40bc72a85523a6bd65c39fefbb28b8e7d0d7d3a4f13. 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/GBPWR2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5494c65de9c0a633b6e10d58bd3ef09f7ce638d6c820ce23e3148f782e2b842b. 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/GBPWR2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02082c375893c291a95c388736f5c301243358e0f63ce9a4ed8e724bb6a815ec. 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/GBPWR2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ece641ef20e8d9f266061a5af468fd60ec45195acf29a21b7922c72f3f3bb. 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/GBPWR2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f107bc52cb912dd4b8723c87fe57a8e2004bcded0c11b15dbc96c3dc80082d. 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/GBPWR2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a821e191d51a20426cbe27c8a4507a0cc66b85c8b08934b631c795aa772086e. 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/GBPWR2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0e77453cccfbe721092593a26ceca7871ac8a3d8d89d5dab35c7e097f31669. 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/GBPWR2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932c24a1e907f5009835fb8bf45ad5044a31c3b258e759595bea0a2547554992. 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/GBPWR2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d29a2fb60381594d5aa884b3357ca21b20eac246a74001989458e08d4a5fab. 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/GBPWR2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9356fc06f091b79103463a27c83dd702fd007a6824b6bd76af12debe060857d9. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GBPWR2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ec2647afe89d0ddb19a2f501f195091460a7aa02bc6372bd3ded7c694ffa56. 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/GBPWR2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fac78e8fc46b34c2938b813aea7fa52661296789fae4c4388c29608540b8993. 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/GBPWR2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57c5768219e6f7048a39440e4c232870a73ff7f0897ad3f043c6b06465da74. 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/GBPWR2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc242449421b8889d653c2b00c2f461e37fdb15c4f41fd6cdb2cc0ab3d29cd17. 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/GBPWR2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66004c1a667a8ef556f66c278b8cace6c6d6cd2214db4e35f5b49500e377585. 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/UKU932390075.