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 0x2d84e592b7a30ea0628320c47bcaf7ff138ecc4c067131f163212d54bc08f66f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1845ba52-cd92-449a-a386-c93e6c407c33.json and https://artists.proofprofile.net/proofs/artist/1845ba52-cd92-449a-a386-c93e6c407c33.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 0x15081cb362254921603f6375662f00e32a9f6d2b9f12cde79dbe375d8a0a0503. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE62M2138737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8f13c8fe9d8a1cbef577cbec547664712a2b61b21b14ec1c73cabdb29a4cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE62M2138739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0a3f0df80fc3940c9d1eb71378826ed7f0b3d3412640f8265a562129aa07c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB42235239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7fe423966a9be74c4e0e92d6683a9af1426d5d610fddc6d81ca4315faf573. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:49:50Z), 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/SE6TI2348621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0a3f0df80fc3940c9d1eb71378826ed7f0b3d3412640f8265a562129aa07c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB42235239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f0f333eae65e7730f7578953a479de70804572cb93fb2f47d24b74a8b0aeb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92350710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bb7e7536a782c63cdd768dcf5f318dd443da37e37865e66c4aafb5dc55f31a. 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/QZTB92350711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c338ee35cf48caf974b592005aa23860328cf63ab908e988ac532a6d75a482. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92350712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9fb459f416a90e3455dd0f2a7cbd2fa44ba5215089bf044aaaf0c773a26a8e. 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/SE6SA2206457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd63bbe2ac4f616d15c9907e9c31bcfe9663f279d0e5958a69b2eed03b8f04f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6I32305481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e9697d1c423ee6d907b318c667ac47234f74efc32b5491f300dfea420867ba. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6I32305482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9d2237945436a62b10c999f9cac6f77df9026e039d20c6f273b8fb116d1801. 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/SE6I32305483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b6f5bde38121e395e09e7329c274c9d2361a485e781c4fd9d8cf3199ea87d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32305484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaded1972ba497a52d957450bdbb31fac0887f47a2f4edcdfe915d053890493c9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2203156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33986ec6aef5da7fc9dfe8940dd1b62cf8cb2bf1f572fca9a6f8f55fdddd1f3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:08:45Z), 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/QZVEM2335689.