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 0x99506876feee9ee24813a8884de964f9008a52c9923bad7bfde527159fd0e072. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21c46df9-f43a-42c8-a88e-e7a1348709ed.json and https://artists.proofprofile.net/proofs/artist/21c46df9-f43a-42c8-a88e-e7a1348709ed.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 0x343e91ca7f6ad48d539b9cd64537a9a86ef8f949f70c93bd6e8586bd6c6b7aaf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:36:04Z), 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/QM7281774227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cc356c8aea2fda6dfd3c35dee407e9942531ec0d471991e7ab566b7851de30. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QM7281774231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4292f39484e0953b1b43082a624f731934ca4cf7795933458dbd53a7567ac1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM7281774233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd9bfd8fdf8e347441b8f56bcc565c953b9ff4a6a2a8a219370f81a1faf7098. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM7281774255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf9a9eaf76431c6ada2e0c048cc4b19d8e7d56f38a20b232038e50c499b13e1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7281774256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010a615a4afc368d250f6d5dbf061d449a60f0d4b6ff5cd743540c69043ab66d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM7281774273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8ddd9be0d0605d2c72574ba3a3f2ad28684534b4f0b6f0e650a06db5c9cf5. 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/QM7281774274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31386a9a66eb661ea563ff5aafa488fe963eeb2171eea1bd0d205dd81484ec57. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:56:53Z), 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/QM7281774275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb412371cf230cdf08b09bbcf6702d1115756536f6f683e1f1291a50ec5dae2d2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM7281774279.