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 0x1a83cc77febcf836c3ee94c74b36c4d7e7034ae2dfa71fb02056a8015dd781da. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eff1a79b-f587-4fe9-b88f-ce7cc2c254cb.json and https://artists.proofprofile.net/proofs/artist/eff1a79b-f587-4fe9-b88f-ce7cc2c254cb.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 0x62b12823b8303657dd0b614c07558607aca4436e2d8415a0b997b2595433c600. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIV2499593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f5a605e00eeff5d1b3761f1cf6d5111d4453da65737726b626dc14a5b76016. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAIY2404008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cbc073d535bec1865435ec983fcd733836b423a60f4d79ab0b57fb8ce8017e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:52:37Z), 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/TCAIY2453195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b562afeff1ed8124bf34867ebfdc70c78a3d56e7ecbe1362a3d2ef663d0e3. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAJD2449651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c2fc25e796e694dca85eb931af98c3ecf19f2af8c068c6ab929c2ad7f6f87. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:24Z), 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/TCAJH2572634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc0af877f8cf8c99b52052205e4ceaa0815004daefe175e9d103a40929c672c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US83Z2520557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09e4f166ea3a127a8ad9db16581f63c738c03fc52e9ee59059988e1d9b6feb3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJU2572772.