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 0xbcb4cf91a17d93fc782ade4e8df061e4e0dfe397837b7afb275eee708465ba20. 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/87a8b7a9-3840-4df4-8c32-d0e150b30a47.json and https://artists.proofprofile.net/proofs/artist/87a8b7a9-3840-4df4-8c32-d0e150b30a47.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 0xa8ab6c71807dc436871109f81f4a99eaef1c77fedc88602e1983b0998034ad40. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:15:51Z), 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/USLZJ2465358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e614cff4d473451551911d9e26867fc35f2db404280abf6fb90905572352b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBWUL2456312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0154d444b128d4e99c0aa118d52ceb7bf11271ef6cbc63f24afd951e75b78639. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTV32449810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d382c18041cbface5c35529edadeb8556021a384bc3ca40c51fec194efd2ff. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:12Z), 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/QZZ8A2427905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66cfe72d3bc9b4e596cd3cd8e986f3a2478f06520314215a784a3c32f3b3b7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ8A2451355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd774fbdead01593dce992e7da17564e3968fa2ac6e64af857146f9f34a1a026. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:23Z), 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/GB8KE2428003.