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 0x04983340574047a46ed27e43b9960993b888c3751e7a621c69544b8821c69620. 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/f8056f1d-8023-4fd8-84c4-f8987f9222c6.json and https://artists.proofprofile.net/proofs/artist/f8056f1d-8023-4fd8-84c4-f8987f9222c6.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 0x40eb39f1cd15f8e1f15721f0bec717c0986cbcb2b59258a1b77afe6294f4cb9d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRRGE9601854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b404410b45544cd22473129b1eb004f9058023ed5847a96db9facc38e12aed. 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/BRRGE9601859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e963fe825ce0f4c9342d8f4a949171ef1eddb2a434ee5c1f01721f791ea8ed. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRRGE8200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28cd8c99600b842fd31b4dc0d1074e23d8843001b0a9da04faa7a69bbe1eba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BRUSA1700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa496b021093a3e0a498f8037bcfa3216c2e4f3ea3a5fb2ed1b634ebbf22a4ef. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:20Z), 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/BRUSA1700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8eeda1cb7a63bef116e769d02e6ff4870cd8f9e76a4109d0be8207c964f7a3a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRUSA1700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c9996ad2e5b1a64fb96710e92247c7a93b613bf54902a9be40ce29364c7a1c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRUSA0301073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326fb08a361429251861010a68031661512aed7aefb05879531d70683f031492. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/BRUSA1700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b806adbafaaafb7b13efd2e7b86a746730573c5372db212b45a9cdb262ec9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:27Z), 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/BRUSA1700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837ba716e6b5d11d6e2d7ebdab02ad709d2862e68f60f12c9fc60d29f6e5e99. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BRUSA0402782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122e47fbc52e426291d9788a5fba9e420f79f398151d6a41cde7ac89de3f1e68. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BRUSA0500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d64f0a4fe9bfa43148625a29e93abbe62e736cfcfbf61f8363be318d6664ef0. 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/BRUSA2323512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784df1b971470d147efec4a173e59eed2744cbbbde605f63a82e79cfe3f1bbb. 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/BRUSA1700428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc99986baf331b823daa6375f696e0c43a1e231283ffa41443a7c5807d20c8. 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/BRUSA1700431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38116e1ae993bdb12245918e95c3b05f18078eab073d2779a484b36139b1224. 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/BRUSA1701173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d53f89965d0dbb5fc40e06cb7be2020e71d3e06480afd4b0361f0e0ff16eec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRUSA0402517.
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 0x05e239d3e3c5a79da1dae5ce18a8dd6a615c7a3671db67f1a134b5b737acbc8a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRUSA0402097.