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 0xf5976e8ccb560f5e1c81ab704d809f528c1be96353b4b3b3dc96ce01207c27f8. 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/f26798f7-1efb-442a-aa8e-c10239b20359.json and https://artists.proofprofile.net/proofs/artist/f26798f7-1efb-442a-aa8e-c10239b20359.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 0xff6ac7c12540eed9a3adbe6d5625c9b41589972982766f47311fb9c5fafa34b1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:34Z), 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/TCAGU2371733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50820063220be9ff2b500fb37e5eedf2426c58525ba5aeb94b8b94e3876f61df. 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/TCACU1673782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b37b914a94daf36427a93ba172debae66128c00838c5a1aaabe8cb8f4a3943. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:43Z), 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/TCACU1673800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474bf5a6dd6ef51b0c6b0ae825f7d7897f6af9bd65ab345c4062c47e6ad9414f. 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/TCACU1673830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7afffacb2f5bdb954a47c7ed694bcd896f7be4b2116d9285ca1a632efad104. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACU1673834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee09cfacc3c65db6e4323dc71b31a5d7902ad29e968c7060c36d986182763bc. 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/TCAGQ2277843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6485fb2096e46a15408863bc212a0ea8ce6d0816b4dcdbb62e46e8c7ed0092. 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/TCAIM2456121.