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 0xa51f4c1a4da3c20a8432b41f0902160d10591436b6097d151e4499dd7780208e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5520ac9f-425a-40b9-82c8-b34efe72e259.json and https://artists.proofprofile.net/proofs/artist/5520ac9f-425a-40b9-82c8-b34efe72e259.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 0xe7d882dc52a92594b00dab7edc941590b066c6afa07eb2c87aaca2d6b3c9704a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2476858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd22e6f958694440f6977b7f4a6707be873f217c356a2a3a5d164527723ed8f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA72439710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93510d778aad1d0b56902d42c2153801f6aa5b3a6ffc1adfe5d07ed3a08de57f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMFME2426393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837c5594f2af4453b16f592ec5e5639de84616b93865dfb407d812dbdec29c3b. 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/QMDA72479650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a4b29cd4dab3b2342a9e1e868e3f6ebe9693b972828cf1d28de83f7318edb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDA72487471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b8480d38a1e38b02ce8858eace158139868d452b6ac1f5b72dae2b9be6b5ba. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QMFMF2439896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603729bfea8d793d2ede9422c7a3722ad136f60b2dcef3b5bf3102f51505ae60. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:53Z), 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/QM4TW2522590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2c4f7c7262a57abcc229242a8ea6a311cbb901ff1f64b4bc564c3714f0e0f7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:55Z), 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/QM4TW2555451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d572beb2ad5207bdeb437e67abde74e2e21aa35110e1dcf93286c94ff803494. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:04Z), 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/QMDA62594157.