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 0x1097fb91dd61e70398038968129a731cc165105f8611d59069da02f58359dbd1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d51abe3a-3b96-43ab-a4c6-ca8019827d3d.json and https://artists.proofprofile.net/proofs/artist/d51abe3a-3b96-43ab-a4c6-ca8019827d3d.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 0x6314a18d6eabe359e7a55b4d068616dde67655e3412191a60f0ab01ab469879c. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:20:07Z), 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/AUGBT2310435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac399a0b1a2c4b670ae1b78d8e902425455a7acb33c28bf46b83c90756400f8. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:19:08Z), 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/TCAJA2468811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac399a0b1a2c4b670ae1b78d8e902425455a7acb33c28bf46b83c90756400f8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJA2468811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae81a3c2258753ec8157ad15dbe183034f929039ac59fc0df3b0e287941bf8ab. 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/TCAJE2536046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcecb9396e3a90807fd9c4c878d154a5bb8ce66092bc6dcd1836c68f2449c60. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:14Z), 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/TCAJK2515915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4eb98f1474e464c9a19298321dd045fe4809ac272ce53360c368b4d4104ff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4R2355468.