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 0x41ef7bef429a8f573df896d9522efd39dec65c89e281b1473d4e63b085074d00. 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/a8ae0801-9c48-4b01-b3b5-d457a3b65e39.json and https://artists.proofprofile.net/proofs/artist/a8ae0801-9c48-4b01-b3b5-d457a3b65e39.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 0xd91b0f25eeacfadabc668cfaac9f2bda7eb49637adb360a71c9858d459d4ba2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2033994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6156816587ab2bd2201eef5e3dc5684997c75268b0ad0fcb884000d0d99004b8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/IND292207125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef655652515b3b25504a932ac165ab41510bad764812acd33d3a9d1e47907c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:06Z), 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/IND292209354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db8e3a5f1844de84a0ee8c4a4f8b9029cd8734e80b6aa5da58ee7a8641b33fc. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:14Z), 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/TCAHX2456539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f2c67e0b4a4c5db009f31df11890fcc0043a630ffe2fa39b3348d1e16a06fa. 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/QM4TX2484792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd42084bc39af25cd79d0f0656971a20242dcf9e647802c88c4621c1f428b5b1. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:52Z), 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/FR2X42564800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7f5fd897c7a9f0b66b0ec193d833d0cd1891bf5e505eae797f3881d485d5eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INUM72501085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457e4a72c4e01d6c59c67f8a674d94a7986837fef367b707115be4dab4d46ddb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA052590171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f73309f9544a5d907948f4b8c4524b4299b939a6e8f63d96712fc60431224d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42312683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4515bb6d919fd2dd3bf382aae8b035ec6a659f1ed64ac872e039b0883e81dca. 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/INUM72303051.