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 0x06fc3b005e38b0c7ea376c54ccd0ea10ffd11c67f2040510ca40c95d621a0ffb. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d4fc39b-6f42-45b6-ba6b-51a32b087167.json and https://artists.proofprofile.net/proofs/artist/3d4fc39b-6f42-45b6-ba6b-51a32b087167.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 0x33cd30fd81a4e04a81e388256eb1736f4a18daac13cdf7ff57bb48c5a56b3fb8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR59R2233944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162da89d737ba521dce296ccf50ffb1048d391e524ee346e1e50055941777752. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR59R2233957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561242a29582a00ae2920c6332403752d72f8fba3bb8479ab03c4f4948e446d3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR59R2233959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ae9d429edb4152d570b0260228ab86e680ae841820f9f08d7010095ba13188. 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/FR59R2233964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac62e599c54b5c5947930c6964811f97daf0b78d1eb90e99536fd7e6b500fef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:32Z), 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/FR59R2233975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0f5ba42380b2b1ec5fb45fcc5c3a94317b725cec36332b5150eca03c7ed391. 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/FR59R2233977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73a624ee0fdb6b7728c7927eb6b9c008f31b85dcd86bfdcf006bcc1c14fad91. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:35:30Z), 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/FR59R2233991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96a6be793fad2efc7b40704f79b46f9b39aef925665b50e5e84a72128c0cff7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR59R2233994.