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 0xe012f6c89dc007662139e82a2b13ba8ac52bdad8b83eb4e94e784a53c3f56517. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffd68f62-5c20-4a96-8850-58d9e27529c5.json and https://artists.proofprofile.net/proofs/artist/ffd68f62-5c20-4a96-8850-58d9e27529c5.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 0x5cbd08fc77e142cbede426255d7a45d7bbf7e70d0c4cab5faed7807a011a5480. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEH742309186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59189b9d66deff75a5091d29503cb1e00e477182ddead76475b6a5da61fae972. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTAX2297677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e44c3a3e32cf734a783667e55cc68b6d0202d6a76f1b67ca0053b72870bb7. 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/DEH742207662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e04af6cd4531f273a3054793fd97b6e83474177b8c0b7d45c35bb66562f6b02. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/DEH742207663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2591fe1240e9552a01bdd451b76e96dc24b316a5646f1fac1e5a80d433181c69. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEH742207664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd8357a8f1ac98427efa0fbdfb08540be922e800c94af8e0aa3c3116f12fd93. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEH742207665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f76c70777dc7718bd02bba799571bbbf2a804cfa73b15afcab671ac17086b8. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLCK42213029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aae416cc7c53c9e751a71355a27754bf97ac874fd84596a9d9570748f641c3. 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/DEH742174944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90898890f4e2127ac91bc2b2d32ee5d9858c393c9b786a59624193568daf54. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEH742174945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27f015eee3f6af9dbc4e878c8605bf2449b8777dc2f7bcb9c080492404b1f7b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEH742174946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bab7c0e9ac2c16550c5a4d7ba1065a196af82effb46c280a33256d5e103222. 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/DEH742174947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e86fcec1c3c9c9c056af30e0bc374375a2c6178e9dd04745f22d7cb4e448616. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCK41092024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84850a502218b13923d5b01548e52fff3cd1d026c72c37d70bd6cd0919aa89. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLCK41092027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac803a657771eeccf5203108bff87d2fe15844a264fef7f54983e48ad14eadee. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLCK41092028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd088c183ae6c348774b8411e9e07103317d5a8e156e575283c30dd27ff5047. 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/NLCK41092029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb60a309502de39810fc12d64a6944890c09943b65c66acf1056ae9b1bb40d4. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLCK41083903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da7f9f75490cbfcb181684d7cd07522d7bdf82e2635198eb8b5771fa340f73. 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/DEY472174895.