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 0x6ac2bd28d83acff200ae48039b6ba779c00d897f73b8c18a3fcdace323ae985e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fbfd87f-c5bc-4724-bf79-7b2454c2acb2.json and https://artists.proofprofile.net/proofs/artist/8fbfd87f-c5bc-4724-bf79-7b2454c2acb2.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 0xbd308b6ab19a89249da90f7350d3a8c22517236d9293d924885690d85de1b1e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA72337484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4c0df502f73fa0255caa1ba5c1cb8bc626fb3f3243a7ce2aca69d0cddbc522. 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/QMDA72340306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2837aacd53ed03c667c34fb56a5a4d96e3d64c80eaa16bbd389029366cce8b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:03Z), 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/QMDA72340280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0463213f12c4cf02c246b0d39a6eb3442de695e54aa728b539f7053f0c47730. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72340441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69f3e9687b629fd1bf74b25af22ee865d65b36e3341187dfc8276804082402a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMDA72340449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fde20d0658922c163e75d33eeedeebe6dcabb01043f38eec4ff4c0c7075d04. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA72340391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d4fdd8e4ef5aaf36030dac8f20a119d740e8b0c9d209cd72c8d195d5f8d1a8. 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/QMDA72340363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae545170fce2728e2337159d9fce3c2ed5fd2b0374d60f6ecbede38ace1eeaa4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMDA72340366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777a1f4e7d5318889b32a6d8a068d0eebbf63b3d03e5b9ccc2ce75c9664ef033. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:03Z), 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/QMFMF2540450.