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 0xf9b8d06380d63f33f88a71960f6f735f66abd4a5e9d58bf6cf378b2c876b767c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c256bd15-826a-4966-856d-688f7ac8e12b.json and https://artists.proofprofile.net/proofs/artist/c256bd15-826a-4966-856d-688f7ac8e12b.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 0x98f3ac4cf4b89dea0c07976bfdbae632ae9a481becba402b8599dc490e948602. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:53:46Z), 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/QZNWV2134658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd815ea2f008ff44f778cae24b524cf4b8af0946325170aac068dbbc09c8f47d. 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/QZNWV2134659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd7d201fcbe29e9fa0c76e0509de1fe3203c3560a1706a0b556011b3f58d4a6. 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/QZNWV2134651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e619bce3e3faa57c80adf1a1957d5c26d8ef6ea51a0817dae50f160bf98a2. 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/QZNWV2134652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f70cf44e31b9f6221e096b521b865c96b45e9c1f5070a7242c5d8d5f8df2a6. 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/QZNWV2134653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74172e0c77d8bfc0abba5ca4b127e1188b6a6f0d1558eb122530a1db97c8f1f8. 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/QZNWV2134654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e9e3c0cc3772b12a9857455d2d4623e1910fd89a40fe8e5d413846f66fc0c2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:20Z), 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/QZNWV2134655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccda3084ee31a7e441b5cdecd167b70670ba368bb911b772f6e0b7c508c34dd3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNWV2134656.