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 0x1063d29e13dd0e53bd24167cc79f3edcee7a7f201cf4fe7124f364168aa27dcb. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/481c9b64-e1b4-4583-91cf-eb7aaf5d9a6a.json and https://artists.proofprofile.net/proofs/artist/481c9b64-e1b4-4583-91cf-eb7aaf5d9a6a.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 0x6a6d33f11741c8a0d33ed4e73e11d88d1258d8a03d9f6c4efaec15154526e391. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:54Z), 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/QZTPX2411708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0598a4f60c14e1809a97cfb57c14039abff9e9b3cb41bac7935ebb100743f7c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTPX2411710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7038e7eeaa6a3d243cf030dd9485201225a06e366105ce72c7cf2bb371211d3d. 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/QZTPX2411706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c50b3688938236e49525c34dfb72d1a57261f02c163c701cb51a72ea3f9eb0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:55:50Z), 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/QZNJW2564855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02894d845f6f1da5bc741ff1d003c04595f17a3d0a351800899be1dbe6161ef. 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/QZNJW2564854.