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 0x1c7ee41e7911c5895d4116f475305413c0d9a3d276e64c43a93944b5c4d83be6. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7dd19ee-edcf-4424-a7ef-d709eb172d73.json and https://artists.proofprofile.net/proofs/artist/e7dd19ee-edcf-4424-a7ef-d709eb172d73.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 0x1ede24190eecef5a65dafed802718fc4a17677104522dd9f6328d5449e98d39c. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZJG52167667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ee8713a136a4381dd6b2a0c562fedfbc24f65ff0e57e15dc7f5c37d40c6bf5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:26:57Z), 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/USLZJ2285124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8fb4eecfb71138bc61690c7d94f9b989bb0cb91d92e1991b5a2022e9b02bd9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHNA2523467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cffbfd036ad83ebf0270f1c9e043bfd5f712ab498b177d346dd2cfb739d1d8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:56Z), 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/QZHNA2523470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59beb63e4b43a5ca54cd533152ccbc0f60a51ca74e7edd039ae3b6e951033489. 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/QZHNA2523472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16604303278446365982ebf89ab8834bc53f1faad78435b31ddc1ddddfa08a1a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNA2523473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d579cab26a2602524ffe1c23124600d0fb97507d4223c4fc983ebe2ce52ba6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZHNA2523475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a18c52b83525c75c2ae3f36a35a3e773d7ee8293213340d77bfeff7571f0ef. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:07Z), 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/QZWFP2512750.
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