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 0x5d7b6f5b9fbfa8b310deca664db34e82945ec493df233e385d0231377e58ac52. 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/26a583cf-f917-421d-8da7-53f745c99a40.json and https://artists.proofprofile.net/proofs/artist/26a583cf-f917-421d-8da7-53f745c99a40.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 0x00fbcc999ee634c810630dd06ab90e681a8f69478b7e8fb9f9a8ceb8b5e92a6a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:22Z), 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/PLE231000042.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5baf5e2108c08f98a4e27395ca887cad865a3f1de15f04a48154dfeb3fc655. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEAR41431095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c33eabc6bc0069adb4e50d004095d6e701f957db3dd768ecaa459ebe567c9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU1476193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8415ee839ef09cee9282003deff31a38a4c2eef6ba2da2451686f728eb9ffffd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBLV61417634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e14573e54dc63b2db25db47c36025b5e4c5a438b4f2183044fde4bedd99ea11. 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/GBKQU1775156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa973fb8bca4eb45c8e77cca4d984ac77fe1de5e5bcd443e698aca546bd49e9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:50Z), 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/GBKQU1404121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3e154db344721026117d492819657de1124918d03b2c4ad5f94d13695f9feb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU2591564.