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 0x18ec8a330e1354958d318660b528c866e2862418ecfaf5ba490d4bc6a7097171. 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/1ad5ab03-ee29-440a-a7f7-059a8e4aa863.json and https://artists.proofprofile.net/proofs/artist/1ad5ab03-ee29-440a-a7f7-059a8e4aa863.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 0x1378dfe4ad1af80a96f13427d7293e5ee003ed0e1e62543bd66cee42d6c04030. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TRART1400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0d13ea149ea0d71b18367e64b4a54106631e8bf3bfe7de40b71433bc15e01b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2363237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59d80462492d3911dbddb02a774ccc67e2ad01434fee4afadac3527c994b12c. 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/QM4TX2217712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da61a4e8a249e3668dad1069abd7c998a3ea49a5d125d173fc305a0ba132068. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRART1600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a04ea320770801c232f41bb3910e17ac4b922f2c1cf9d932ccc6b512f31bf8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TRART1600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c8772329608094a39a6b2b0f18cb9d04479b7b3d44c12c454e4c2b1b6bc801. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMDA72194653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b68df15424a0d056b2b1280e0a9b1ef9d0a1e15793f0859ae618ef5b23ed510. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QMFMF2129248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0d13ea149ea0d71b18367e64b4a54106631e8bf3bfe7de40b71433bc15e01b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TW2363237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd646159de3e91572dc11c3370f1dc1109472754366899497a30723cc9eccdecc. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZTB82349968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d31e005ee188994258bbb3211618b2c4d8872639ff6a34ace0c959481bb650f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM7282494905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd763fc4966e46f3bd99cd50b18c1bccc50cf6945a1ac1b7e7c643f6b1fb5bd9e. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QMFME2444624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c60b3d771c003dd36504085775abd5cac3103aaf7671e8daa34996ed9e6222. 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/QMFME2444625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0387c19e1b31b7d79ca26469ac5a77b3a2b1b048f70d895a0ae45d3d8bbc539d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QMFMF2458013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78faa543d2af02074852ec7cba48341eaeb09eff8a15518c8e6a46f70f7f43f4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM4TW2535601.