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 0x71407ccf46eeeeafd678fa730043562c8f0c65ba14543250ea39044279ee3558. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bc9b3f5-b7a2-4b16-b452-0f1243ee1de4.json and https://artists.proofprofile.net/proofs/artist/3bc9b3f5-b7a2-4b16-b452-0f1243ee1de4.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 0x2fd9eb8c78ceb2008567e7032e6700091d3ff92d943cdc5e6f111a9830135384. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:25Z), 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/TCAES2060007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34407dec5966316aff104848a48b9415d39234f132b8bfc8c138eb9c91b1bb. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/TCAGB2219072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb810f840d0a7d2db5b7d3af1c3cbecdfcf9ecb68948f2c200edfd8e9ac8882. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/TCAGB2219090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbbef33808b6a0c87c896abff2dda1736a68989cd678f91e968d3e796d86d70. 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/TCAGE2258991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1537eb78eba93e2cd0bf161eb41530d5578cff3000d9b865b2de5dd5c71f58f. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/TCAGB2290342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dea219978e6b0937ab4798191312d217dab9810c5aa1e05821e162b453d0ef. 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/TCAIY2411450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59698985d647692608d9c9d52f500ea319754f65296e63def370470fd4ce73df. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:22Z), 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/TCAIZ2411492.