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 0x32f06dbb4cecf9f3cec94564523483029e1d3249e41d111e612037c1d424a3bd. 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/6fdad0e4-903f-43bb-8656-e13dbda54643.json and https://artists.proofprofile.net/proofs/artist/6fdad0e4-903f-43bb-8656-e13dbda54643.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 0x4c35a2df825a1c70b8586475dc852439b881ad3cb5f01e672639c7c5b069dbae. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:06:49Z), 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/QZTAS2197288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18875376bf28f1f4042bf84a7c615d808b717ee06779e1d72a9aa1c147854de3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEN2219533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0131cdc239958274f1ae905c4e81727c486cc57308fa2cc4d264f6e8506598a7. 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/QZMEN2221908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3eba336c1dfd0005dfe7431d024ec393ab8defaa9d119bea06875a92b88507. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/AUMEV2422303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82af5877f67c0da345a3de3008b3e680429e6a887f5de29737b9d8e3a8a014f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUMEV2444073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167141f720c032cb9e80a03eee69dd01d17833cae1ae3179e77ac799926bb07. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:07:40Z), 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/AUMEV2444083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76867811376f2e7789a7655612c1740500ccb9daebd827ce70860fe466faeef4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:46Z), 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/AUMEV2444086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2b8bb232824eb959990dcc6e27d6bcd539d2a21fbbb44a55f7f0322cdbee25. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUGBT2415119.