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 0xc1a0abceeefed808d3a15ea364d4a3935c4c178c5d9a983ec64f9d52367a5009. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db1d617-5d93-48d6-82d1-0d69fbac0c28.json and https://artists.proofprofile.net/proofs/artist/5db1d617-5d93-48d6-82d1-0d69fbac0c28.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 0xcc68a82aea973753fb00964cfd84694ae90dc6949482a9e5ac54f13fa59cbe1a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DENI11600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98451e53d59c6a656682f4e2c25e57a3834e5363142d6666147685efa9f3e5b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DENI11600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee09127c4b11bacd3b7559284b8358faad86092c6dd9277f48a55ddfaa4a7eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DENI11600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c7183a45e627431c11d24916e7d72a66758bc71a325267ac1ae544c5338a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DENI11600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5662e6804ca00165098fd7a5aad871606b70e9c6a3908fd1149073cd33576c14. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:54Z), 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/DENI11700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328ad3e03dac486d9ce0d34dbdb6a6ca48e795528846140a1bde20ad3077a066. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DENI11700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75106ea2f143f31257d6a99614d339f7fbe397501d9462b9e0541cef7f682bb. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DENI11900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985c168d82c72bbcdb93342ef7ba035344fcfef1c27dbc18b41d1f6684b4855c. 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/DENI11900168.