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 0xb035e7190e83ee25194da03d45313bc286d9c0e870eaec40c0d59b1e8a8e2778. 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/6358d325-5810-4dbe-a130-87c4c37f265a.json and https://artists.proofprofile.net/proofs/artist/6358d325-5810-4dbe-a130-87c4c37f265a.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 0x9f54f1c2c43f1090b773c62fd9a88ded11da019ff492a042f556b1b772bcb2ec. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QM6N22236392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406dc1dbf2c416a2f6762c29e1d28097593f30085a2e2b465de713e251c9ec3b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:56:51Z), 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/QM6N22285648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc97c675caa029869b94d4e7e4e064c087e3b70af6ab3b3c8deea0cdab49e2cd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM6P42208284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aeff25cc6164cbd76ab18e88354b1e9d243894f2e1151a269a9437721083b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P42228234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e3219707cd8a103c4b20311ad7424260a2a14d7a4168c2bd6b562cd9e69c3f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEQ2279600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7323e8218e7a894fcf3e53283bb48a72ca240099bfd1d34d5d9a372512f2de. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMDA72228248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1256ac353ba681edf3e8a14599039ccfe1d12275770a76bcdec20419c29b7f0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:45Z), 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/QMFME2242959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc840de43ff5e4b7fc86af332539dee9f5b71d1320dd36b359e4b97e25fadafcf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM4TW2306853.