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 0x675206e91eed4830770b42f40be807ca2454c75fa2dc8fc6fd2b7d0024edd202. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8be1e687-83ad-4e11-a848-4c148c8a9138.json and https://artists.proofprofile.net/proofs/artist/8be1e687-83ad-4e11-a848-4c148c8a9138.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 0x4515d3b9ac245b450c720b38db8bb9ae1fc04f3f2d7c8e9ea2abb7981ea4c988. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GXF9Q2561686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509d9bc977ec32925289b49fa0a3fdef17c22188fc14ca97dad740b05c311402. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GXF9Q2561687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3a2eaad541d61475e984d6fb9fd3d778ebe32772874df83ed638ed2fc1e755. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GXF9Q2561688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e051b5b116c8622ec4342439f8cf803a9067f32355c3d02164caf220b72619. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:27Z), 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/GXF9Q2561689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8c1fd8ca51af52da1ee81955f47fd1b54a98003c669f0f7a799bd9d88af500. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:51:36Z), 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/GXF9Q2561690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4370abc3b88b58ec37e171be3850f540b91ccf11faab7d2db281fa8766d9ce2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXF9Q2561691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a0b905b8249bf32dc3d9acc49eccfc3fec34e5cc9e80af7fb0e4d280246c7. 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/GXF9Q2561692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6946d82ccb239c8fff19ac82546de787a7956dd889c927f5b0cf0f835c591014. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GXF9Q2561693.