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 0x34c5104a8dee4cb7ae356c879e555a60ec4a78b1a11460a8fe2be9032eeea879. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebab5a5f-b521-445a-b349-bf6f3ef8c5ae.json and https://artists.proofprofile.net/proofs/artist/ebab5a5f-b521-445a-b349-bf6f3ef8c5ae.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 0xd799a43e2812e9279beb28678862464c5481f8ea7fa6cf067ac62a4f1b04d556. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TR4590901477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc7ec4ad5e1b29e612a52ec278653fb0c355b62dde68801b6d1b1638a6e8179. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TR4590901485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5512d811e8dd7ae541f0f5138a5748ce9a6b65e89971b8d8505fdf94ed74fec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:13Z), 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/TR4590901475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd799a43e2812e9279beb28678862464c5481f8ea7fa6cf067ac62a4f1b04d556. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:10Z), 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/TR4590901477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc7ec4ad5e1b29e612a52ec278653fb0c355b62dde68801b6d1b1638a6e8179. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TR4590901485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdafd05554d11060fb6d440fe559fb167db88870f436d974a09b999a0a67748e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TR4591302902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78895e6b4b84296162f9d12ffdab949a3c79c634020737a4e5635678e5f688ea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TR4591302906.