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 0xab8b9678e56970c47386f3c7dcb124dc0de743f79edc7b36bbcf45458f6156d1. 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/6ec8a10b-007e-48a5-a2d4-a412a471d9a3.json and https://artists.proofprofile.net/proofs/artist/6ec8a10b-007e-48a5-a2d4-a412a471d9a3.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 0xfc889b13f79830d75c59188aeb95cf9d7a6ad330887203f9876e325f666aa4a0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:33Z), 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/RUB731512845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcd59da833f211ec60e9b5608eb67194d802950538aff1f380182078a543b1e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:26Z), 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/RUB731512853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b24cc6c5b5006b229bbfa5f05de6662aac3d3951ba29cbddef130fdb096f8c7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/RUB731512857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b904200026997f73d972291d1fe21f6583282426f01114cb337d11f5ef96c11. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/RUB731512859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef16df3cba2ecbbe6fcb3cd3a69a68b139bcedbbe1faf8077ad424deeffeab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB731512865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90b8aca66c76916f52211e3a1cd844cf1b638eba9988ed0c945fe964795fb8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUB731512875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba7ad737e419e05d47f2020d172035612fc4886a28210a4f480f5da9a468619. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUB731512885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c205a9afe7bdd5ed92097ddf64e2c694a901050403b2d25a53bb361948e26. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:28:55Z), 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/RUB731512929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5488286dd0f003ce19c617067d4a2f0e19ec8c20bdf43bc53164970bf96c8ff. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/RUB731512849.