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 0x811c6498beba792175026a11a724623716520bb73ec8eebee91744f0b7d29c5e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59f3d327-cab9-48ed-964f-ed5047c3efd7.json and https://artists.proofprofile.net/proofs/artist/59f3d327-cab9-48ed-964f-ed5047c3efd7.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 0x4cd8032e8ef49a23f73459cecf768e2e11219c4fea46acce5ca009cdd7da078d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARRO92500659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beec23294a42abfebd9e420c9d3a2f0ce9223645d432c153b5059b592d4bd6e. 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/ARRO92500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2ca814ae3545c48b7ff1a12519101d64ed0d576ab91bbeaa04d6db719eaf8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ARRO92500660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56a3084c47eedf26b9ac3072c8e429b40772fb3dfe69b6b2639f064d976aa44. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:50:59Z), 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/ARRO92500692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8e043352e53845532d48465a794fa32dd5e289f14f03d8f3f44b0e636b21d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ARRO92500693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bea95f1bb81f64e87a510f1a87ace3b0bc4a45846b65eebc9743ef3bb7765c. 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/ARRO92500694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6641f8061fd28bec738b07539016c00cf15e7b1ee92bb5e9451daca36ec0cb. 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/ARRO92500695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d0d9b9f30bb7a49cea35775eaf3f97e074b48a0b4dfb9ef01652e16781ea3d. 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/ARRO92500696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89877579919b86aab85bbc3559ab99c0efbd62a18deace8126f0b0e5d269aebd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARRO92500697.