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 0x6f2f3ef107fa97522bd0920337d7549ff710a6e13e2f8f2369243423164744ad. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe03b86-caad-4213-b4a5-291d1abe6972.json and https://artists.proofprofile.net/proofs/artist/cbe03b86-caad-4213-b4a5-291d1abe6972.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 0x91fb9a2891e816b76c701f7073c45b684e5486bd38550bfaa39554df61207624. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:14Z), 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/TCABD1111173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb4bdbb6ea412e3efabf4ecb2bf26238bc64de30fdc98afed455bfacc65beae. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCABD1111174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aed561366d86fe5c9b0ef58250078989f04a75285613142a8f26ff346f05d9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCABD1111175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa825f278458e35372337c7a144075916e4ac59734640d6b2916b907a78615273. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:08:10Z), 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/TCABD1111185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6637ef7dd3c89dda60223aede40fac4855eddeed8d012107ccf098f87f8a05d8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCABD1111188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c42b3aac4ca4e18e636ed89db88c8a490ba7270cf5c4918a1aa9637b5418e1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCABD1111190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede373eaf18d68e0746b9f59022f01637b29e037f95f226f85d3b1a09718dcd2. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:07:49Z), 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/TCABD1111191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbd5d00e23ad71e40bbbdad693af4493760803b0d061baf1743b6d57864ff1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABD1111194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150ab4c66994ee39675b7bba4889668c4c4e1792de3f8d770e334ad28ebe582. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCABD1111197.