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 0x1e64810047dd86534c67b575e04edc283e7ca8d1b28e3e8c11d875e5ace13677. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ee2792a-f48d-4b23-9ec7-8eb0c2408c5b.json and https://artists.proofprofile.net/proofs/artist/3ee2792a-f48d-4b23-9ec7-8eb0c2408c5b.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 0x82f3e035990df5876c1f9cc9790117e87eb4b29d339ecf3707ed2ea22980a480. 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/ES6321620801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d973e956451d6cb0d78d7bf031df6d7a17f5a90f04d6f75b78c7ab435cce4f2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:48Z), 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/ES6321620812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceffb138273c0d59ce47b19cfaaa97a414a6f276e8145c868f888229ee9c744. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ES6321620803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fcb84dd422b51d4ef256a4450134224ab8e5ff3bd5a787ea4d1afe148aed29. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES6321620805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd3c37ae0d5c9573f29f7c38115901251c6cdce64687a951a95efa548268a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES6321620806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e4d36131820c413724c835bf51ba7ea2cffac7cceeb3a24851c560e8a0085. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ES6321620807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722c6a016121fe25fca1186fe1f00047d4855e4cfbe8c931f678161acd20c514. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES6321620810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56de9a29d9e03a0fb9d1de5daf07d87d7767ba1bc1d405db5c6701f3cfea348. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES6321620814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b4a3f6cb283364ea410ca5c6ed1fecd666bf3f7a8e0ed7d27ce2eca506b9f9. 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/ES6321620818.