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 0x18a6537e1c849656a9ae1272beaaf0d8f39e324074185be67f4e484e9f175681. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6b511c9-a79e-41f3-ac2f-1a2d7402579d.json and https://artists.proofprofile.net/proofs/artist/c6b511c9-a79e-41f3-ac2f-1a2d7402579d.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 0x390bec09d60f3278901d39aad345ef4e13eaa3739a57a1d0474883a6e91f5b05. 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/FR96X2225128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf407eef3194a10bc0d89f9535a1ef7de437a5964b9495d9cff217ff8c67a8db8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFP2157950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc770f3484c0f663f47bc343eec85b85e9e9ee733562cabbad3aa2c9970949158. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAFP2138982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941195efa9891bf15f60dff6a3c48a1216758405ca3cbff5ed8a591ff5fa624f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAFP2157994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eb1bc292290b129e55c1cf66210561d93a3c7bab4de88af5c9cd4752e4f5f9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:29:46Z), 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/TCAFP2157968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114c8b3abf2542598c9f23a2a84867e0588224429da1e52bacaed102b32ff932. 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/TCAFP2157966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2bd0012ab80417e16b4955f97d7fb7835d0a6d9159b398e55e76132f5c1d5e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFP2157957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb9a6f8916ee2ee76876b97a3ebff7d19bd50b0279c4228494fc4d77f68040. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFP2157987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b55675067f07006bb4030781be8444306a99a8d4a03e4211370228cb3b3ac. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:52Z), 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/FRX282204302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2bdade08bb6b9b95bb67fa83de891fbb95f99d0304252a2fb32ff4b9d3b7c7. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/IDA632308502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a010d03930bf09052a373f409ab25c584a99b42322bef3cc05308a07db0674. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/IDA632308588.