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 0x17e3e40f668f72ffa2fbcd29e5987315f3316edda7d2741210281e11f111b99e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60c63e90-aa2a-49f0-8739-23f2f09761de.json and https://artists.proofprofile.net/proofs/artist/60c63e90-aa2a-49f0-8739-23f2f09761de.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 0x79f65d7ca85100c96d6d820a0493f0a5c7b7907d4d51f37df03ec5e975df95f1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:53Z), 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/QZHN72399733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69123ed5988aca26aca5faedf09ec4e00af5b5e817718c8bcfe03000faebdff0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ792404232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdd969ac5545216823eb6b7427573f3838d0c6e424f92af9e30669e2bf61995. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ32593835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c50cb13264fdd19a5086a82e5a6e8e14144b331ce36300ce3d8178ef69cda9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFH2576544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86b89a2a58991fe968a0365fcee811aa2554af3a1c4c619373296130227ff6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFP2575798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86b89a2a58991fe968a0365fcee811aa2554af3a1c4c619373296130227ff6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFP2575798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21e9bdbae4a9b46636546a76c2e935ff3e42b6222573882e30daacc88f1a529. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:25Z), 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/TRBSF2500333.