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 0xb6b87af1026f72fbb424b03fbf26eca228ceedd9b7600deed630255c6859a74d. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba57e340-ac4e-446d-9559-d79e45f6cde9.json and https://artists.proofprofile.net/proofs/artist/ba57e340-ac4e-446d-9559-d79e45f6cde9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8b759847430e248eb7376b3450a06bcf83c8aca76c0f738e15dabfba5ad6503d. 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/TCABO1329792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ad05876558f0c6fb3607d878d5a00e5da48b159183d2f8796c1f6714d0611a. 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/TCABO1329796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c05bde54d2b26756bc5a72cb540a2dda2a9dff743df08e7d29932aa63a26626. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCABO1329797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea664c42448eebf3c844ec36dc153e32c1c1aa4b49acb63eaa342f678a64658. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:42:52Z), 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/TCABO1329801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef1f73154a074ece950bb7e2c2d0f274264b906b57de4b7b480037bc77d0880. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:55:41Z), 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/TCABO1329802.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed280a668ce1b3231f0cb9eed7fde6fb5a0cfc2ff207d95e83ed9e9b9b394e65. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:27Z), 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/TCABO1329805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1f25f8b730ae1739d0a471003bbb83955fe9a264e4ddfd6c72bf615e1e8139. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCABO1329809.