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 0x489ccf417b784e146528b8bf0813ca8bf7a01c3b2b66c34f6fdebb4dd39d99e3. 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/af34f79c-3a36-4c39-9d92-99a567d4b2cf.json and https://artists.proofprofile.net/proofs/artist/af34f79c-3a36-4c39-9d92-99a567d4b2cf.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 0x9d68330067e00d9d67682855cc7b6d9d1e2d1a816d4f3e12d8200bd7d267c9a5. 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/QZFZ42321084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b69ea72bcc9263095d6ee81f7938afa15a1c793cbc36cbcd5103d26d47c54d9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:13:33Z), 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/QZDA72315604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c61c45ff9174ff69fea21b384257eca7dd828047ed4753d7a29b6054d616d56. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN72460389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa906c206dfe9b0014c89010e197dcc299c3e8e4c50a4a16ba3b670b2624827ed. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFJ2472897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6627b1be7c3eb4490023b0f48eacb305046374d994c2b748c1c5d3a9195aa813. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7P2461440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56bc7665cfd4e583156f3052f28f705b2a6b3ee170e37c12dfa1bcf0b56f367. 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/QZZ7P2461441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a0a7b97cdb8cc1f141ac9de1fff2fbe5b9ff38a4264760ab687facac7304c0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:24Z), 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/QZZ7P2461442.