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 0x7ea33db66cbad729d82f2f46ae5312fef5332df48b3d7c5b771841de7de92493. 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/d8a1ac11-5cbd-431a-9da7-6e9a62e3ea52.json and https://artists.proofprofile.net/proofs/artist/d8a1ac11-5cbd-431a-9da7-6e9a62e3ea52.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 0x4d1e71bfc6be75b430cfa767e50e078e3e041e3cfe4c6428d7e8c1eec92d4dd5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2404802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf680b1bd98f5431bad11ae48393a7639b846c67bae2c10f68273492019f3b2bb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2404803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea4d275e46e55a1347464fff10c06f49b3ab622073c5340554c3f3924f244f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2404804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1933de55e6805b431a46f82ce4d757c8e38ae19fa90392a34043523c7a1fcef2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2404805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b043d7ca85523391f36ec960a62ce55a0d4b23589b5d07ea42bcc831e90a6c8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2404806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480d7057c0923931f36c85925d6c982de33aff4c8f70ca44401f6a4424c3ecde. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2467491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe648eff64f94f1b777ee159ae6238ce12c73af2e670889084ed0f0b39c4b0824. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2402057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd5cea25416ab3ddad44e23ef7ecded330f0f1c6ff06e061eb475991cb0591e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2402058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833cfb29b4e70c7afb34acf7f94b60a612069f73856d0598f5a1e39081c4ee53. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2402059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7edd7027516a149da955c881a5db51900f0e234970d37a6a83fc2f73221cf8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2402060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05205fd987158ce57e721dcf4ee2ea88374281ce6803578996032c08f97529f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2402053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc789db0e5b669f557c57fdd691c2dc1605f4cae05638dabddaa3d666ba82251b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2402054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eb6922792a6fc1362573f5bd92a8ec9905d399c2aaeff4c88ac200ca651ebc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2402055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5087e1f79695361af9760facea605d55050351741e941a93ff69b49386a72ab2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2402056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28022031a9fe93feb33205590243f836c99f0b34e786a8463bbc48ddea9e851d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2401933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66915a789d18dc981ff9ac24cb44df9829d5efb1d64416dd1e3c39f789f8a3ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2401808.