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 0x3b1f7425eeb935f8455f8f54edfa5150162febdab708d4b31b4b16f6ebb98112. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ae2677a-1b84-43b2-9229-8ffc3603b59c.json and https://artists.proofprofile.net/proofs/artist/8ae2677a-1b84-43b2-9229-8ffc3603b59c.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 0x24c3f1c48fa6ebe6717e62a1e2393eb6fe0057a2dfac875a66ef8834154ead7b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:06Z), 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/GBPS83852809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2700eb4765bcbb18b0199511fd57a1040ba74a0154ac78cb55108fa92a618df8. 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/GBPS83852813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c262d384099344d43171c95ddeeaa07061c85f22d75ee920ec7a01709c389ac. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBPS83852814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186afbd543929ef4143d9e26291e3a4097371e1a80f37b7fc88bc9aeb4bcb241. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBPS83852821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f5e7941c8bf6688db743477cb225ecc38e1ba9aad660171f6d7e445402bec. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:53Z), 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/GBPS83852822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12165b3785e03a8bd9a6f5b83c56f023c856df8199d2986a64c99dd3e0e3e547. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBPS83852829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddc912d7da50dc12f46bff71a6fa8a2dc7b757e56c36ee5006e0cd44462bedb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GBPS83852833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a58a99e51dc80176bc0c8cb9415b5fc08cf3de831fecb6a9e2a3f3313f8751. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:26Z), 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/GBPS83852835.