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 0x19479fd512363c0f6da3b8eec1a5a25e93261e906473a3ae96ba50a34fb0d9be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/297e4ab7-8648-4ff2-9d78-2fe1fd2b330c.json and https://artists.proofprofile.net/proofs/artist/297e4ab7-8648-4ff2-9d78-2fe1fd2b330c.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 0x1b654da0b585ef80d221fd736efd342c622cf56110920d958847e20dc23c128c. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZHN42235828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092f44ddfa1a783d5555c24bff47dadb51c6ecb7074d13369536a5fcf4451bf6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:15Z), 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/QZTAY2357667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7352c03b3274b5cd0b3ddea4d40cbe108381eca06e076c82d11c48e9301fab8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA42472850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d67ee385eaf721131561a186a5253360245f20b5f57836d7006c64f2b00d89. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEP2430588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3962979d69faddb7203156e78f68aa20cdde5f9f18218cc01a06a3b45dfe2107. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEP2430590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cdfe7e6a8ac0f9d9aefe6ca16761abd6421366e3fe9a05fb3c6a5f2614bf3d. 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/QZMEP2430585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa871d5cf1aa03142bfe88cc1ddd7b5c67bd062f16fbc6b344078b366f33db06b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZZ7W2422503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a0fd29d32357fcd207e6947faa9456d1c9e3522fec9fceee5476a8c1e2d2c2. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:34Z), 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/QZMEP2430591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6f1d5afa57f864606e87207259df18f7227ef918c1b128898eb98c52e75c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEP2430594.