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 0xf10105ff10ea4367fc355aa972109b190e9ae2ce4a425f48abeb0f4de8914921. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcd89fcc-2db5-40b6-aa40-8aab63f8b8d7.json and https://artists.proofprofile.net/proofs/artist/bcd89fcc-2db5-40b6-aa40-8aab63f8b8d7.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 0x0b053a683a1167f3f9a817965230557cab500366159627026f2c056f5af7b778. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:59Z), 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/QM6DC1908522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894fe3eb081e6cfd84df2ab00632e680bf10b55dd35e3bca1017b31a24881f04. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM6DC1908524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf7d959b7277286fce2be10e024f64933d45cbb4c202e095013d2c9d2f77529. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:56Z), 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/QM6DC1908529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cc36b6c58bf5083feb19cc39cfbaa18fbf4f07bf550f62edd72811d61a6f01. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6DC1908532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe673c2bbb0f4c6824abafea649e4c6907178aeec2f7fc5a04a807a7061285865. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:27Z), 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/QZDQH2384096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483996f1f037ec3fe49c2ed1c4f28a13e9623efa7ad8c4f28fe9baee0b82f7f1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDQH2384099.