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 0x4af32a3799b0a242ee8e78f958576a2195634c4c866925441e03e105cebec51f. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd705c0-0875-4a0e-829c-f70927ad0a66.json and https://artists.proofprofile.net/proofs/artist/7cd705c0-0875-4a0e-829c-f70927ad0a66.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 0xac5c595eea375319b15e9988d3e55dc648ebfe21b8793e304a062ae3741cf533. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:49:05Z), 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/QZMEN2270135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239d6d58cbff11c915c8249e13f965c306ae5e9f3a78dd06039b76ec29d60b00. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:28Z), 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/QZTAS2284852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e2b4cc69cbdc37d90dc37b5dc5319fd28a9fdb24ae1454201df6c6e67abd99. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA42587389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7965f668d94140b7b93f4b94cb6943b9b2314154d32d487525a027653f2ef14a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTAT2288535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dc9ef20e8d3f18f8c0a7aaa670a2abd443666120e6a6c02629849d1415d91c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA42571876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b53fd312000c02892684123e5fbc8e27ab90e5b39bb1c9466c871867f0b6941. 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/QZNWX2255461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6167770eff240ce5e7f657ddcceec2fc28812f05c77a984ad1be08c4da45888. 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/QT3F32460737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc83b8d0a2ee107fc967d14414dc5c5c6acd01f2622fa38c0ab415cc739a04. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QT3F32460738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb33c1f90af4f8865f4650b40664edb565672a17f3ffcf25961e4e614c352732. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QT3F32460739.