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 0x37f8bdd1616638bcceb5c6558ab33065c3f10459ffe45f28cb5479de0705c332. 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/c213b25e-2f99-4a8a-9b9d-9080c1703a45.json and https://artists.proofprofile.net/proofs/artist/c213b25e-2f99-4a8a-9b9d-9080c1703a45.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 0xddba8cacd9b838592e68fbc0ed095923f62ad4298254a4bf753d2bf8b8abe0d6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM4TX2331547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eb6f11450226e641920a9c1ed9e5683cb6a57417693456755d0a24a2d9f3df. 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/QM4TX2331548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc417b650f259753683cf22cb2f4959065c07ba6711ae60765c50832345581. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM4TX2331549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053e3ad164f04f5986dba5bd83c1482982a570f195b245159fb0f011aaac1d19. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCJPV2371099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032b6c4023b55dd3f8879cb16dc051857b893925104d151f91da483b3edca975. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPV2383828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157cb5f165855f60e09d2be03d08b7fae4d7b2df25580eea1fdac5ad0fb71d6b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCJPW2341179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c9098b0bca18675d6000e834fb53345c0e7541c05777cfec2dc86a9ed4b77c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCJPW2354048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b8516af0d7d987f407e49de113cfdb87048627e39db39ccfa12169d2df0db3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPX2320877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ce6007f28fa3ad129886fcbe9cfa1016a7a60060a92dfe135d1791dab9ad9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCJPX2341429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a0bf1b5c83cc9545139429fcf0f2f3af9e34fe9d38803b80d41312f38652b8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCJPX2371092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aff07cf4d35264aac8bb2cbcc281807eb52ba28116718b68ed3e37518ed3a0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPY2474815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20df947b95338db3e4d4c94e5605dcb3f1a2b0797ec0aadfb99784d2b45bfca. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCJPA2427121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143fdf973d2709da8b8e28834e97de44288b3b830fc09b7511d348d571c6d855. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCJPA2427126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8d5f65f00233bb99534387d3e29f7ef9221babbe6a7bd439e248fe6e641aa4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPA2427127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e84f9b49aa305d771b7279fe92b5cce4b061eadc8e9696717a9bc3aab90476f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/TCJPA2427130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c93ca263490e2f3fd199ee893e70740df8d2314d30d00fcd94bf17d400107ab. 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/TCJPA2427133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edad70a6cbfc9b6d54d844461c2385b51df228e4c92921ca8c7dbc553d940a4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCJPA2427141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6f4d6c0b5e037863f23e8b4027fec4af06e73ba0d07de9d811af661a343fca. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCJPA2427118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e415c6071913bb48c80383b89596cc8b4b22743f5f1e2f95c353324271bc00. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCJPA2427145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b39b6c1b1115f6ea6a4c0b2d97980eb5f5ec48621e2d267e709eeb3be222c60. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPH2535263.