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 0x92f52ce44e9af2842a417590a68fbd24f491e1f5c1ed3ceae34653a28509f066. 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/95a16100-6b99-47bf-a43d-563200f4bc13.json and https://artists.proofprofile.net/proofs/artist/95a16100-6b99-47bf-a43d-563200f4bc13.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 0xb4cd88c2a031551298cb90946ab84a076bb60fd88074539cd9562ad90026c911. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:34Z), 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/GBVVQ1501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ef1dce38b2da8df2f146d9ed055511b1d5da330d37aa9cafd654476bb3902e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/GBVVQ1501409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0f6bbc8a796b039c37091c9a2f792892a5f35db6dde4062a0b265b186e2bc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBVVQ1501412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabc95d3ced605d78a41693b5355357c263d30eac2a26ae0836892f662c1ee49. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GBCMZ0375815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9cd8bb5f6758f873fde345f5ecc4298e3e7aa46d1937c7e4817e301aa9e33f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:03Z), 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/GBCMZ0375816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864dc074985741b79408f4146b3e25a353e6a5e1e0479e4f64e47ec26d7ec3c8. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBCMZ0375821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6939cbe2417b8d7a788b79a6adcc3c563afb4d3969bd25a6ee0bb69114462f71. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBCMZ0375825.