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 0x7fc0069c65411b3f0d7567a031b89d7d33dceb956accd46b49d4d4dd8918a222. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c23732a5-6f8f-4edb-b716-6c56d6093e58.json and https://artists.proofprofile.net/proofs/artist/c23732a5-6f8f-4edb-b716-6c56d6093e58.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 0x060d663db0476ad940ca20124573f9eb3d7abec4e35a1c45717c4956125be357. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNJ32401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5a24cf83a4b5d3786ea89d3ca4f483d43a9cc25e2f2fdde146acbbc4e20f2a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:37Z), 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/QZNJ32401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31749fec6ef79cf5d0ec2f46d042e5f4d636151d041a521881888b031243d452. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:34:51Z), 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/QZL382530027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522c10237cc44dde6b7c90b3a0ee61573bd3ed035726e31f22f4f87088212535. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZLL92542250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443bed5ba2b86e95a79b4ce130a5bdeda2d2cc08352f61b74478623fbbf519b4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZLL92546218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd387d15ab78fc286600334a47a77872be623a4b5cbe7cf93bb33f830303df2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZLL92546219.