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 0x3da101319b9127a24104c5d761976e960a6bdebc6a4fea07808d549556e20442. 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/b6dc5e78-db05-40bd-a5a2-93015b46c5cc.json and https://artists.proofprofile.net/proofs/artist/b6dc5e78-db05-40bd-a5a2-93015b46c5cc.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 0x3dcc31fb237a9c334ea0b870cbe19c7a0839a0ac97306712650a1212b8e31f71. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:05:19Z), 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/ARFSB0700657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a03f8c9c6027d55689c1066700478c6d6c5f24889d31ea3319ecd35cb741c7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/ARFSB0700661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cafeb76258b399cacb52d16c066fb74a41999d38344db47508b9cd46e62cf8a. 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/ARFSB0700659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba3d3c1a927d13df68477e048f8f1035c7d8832a68d24b55c0fbfa069ed5331. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ARFSB0700662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8c7300df026168c1c19fdfb338a1e7670a02d00f91cfce8b7ed168a720419a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ARFSB0700664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfda8ea306e8a199d2dd02457894dcfd63ccca6a09be3a6a3d396bf508bbe5ab. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:35Z), 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/ARFSB0700660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccd6c6cfa136eed9629b7a853f9f25a34b0db815cd187e47fa55476c12caebc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARFSB0700665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc51d0037d102c9da77500382dbf0d993ad1330a4c14e6b80553d5bbe665f5a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/ARFSB0700666.