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 0x1db9571be76ef531d9b0de37b8fba4ed37952ec6603de1e8c14b9f9bf2a032cf. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99072f57-a977-4e2e-bd9f-f517bfbd3934.json and https://artists.proofprofile.net/proofs/artist/99072f57-a977-4e2e-bd9f-f517bfbd3934.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 0x5020f962a49a4d4e2abb46f5e8837748f9a45127eb8451cf7cd4803f9bdd0c74. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZVEM2533934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c35db67d1257d1ef7feb2d19d6b86f01ad5b4a0490c40a3ce550b0d9185436. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZVEM2533935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e155b5aee16820c2e02482d9723b4a10a9e72db925baad93e5d894749197ce2. 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/QZVEM2533936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba129179eb5b9bb42f9ffed3c57ede979046aba4542cb9938438da96a42e6ae1. 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/QZVEM2533937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90415d077b3886ac10abb8c3b356ad99ea15872becef5ac3a64d2c43131d4025. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZVEM2533939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051fc2376288d11ce2f9aaa1388441e7a906d6b0cdf5ed3c169d9e4c725f3ec3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:41:53Z), 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/QZVEM2533940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c21008f3937575902b9e8138f2826275edc9b1a4a19ec46a3d4b6af375145d. 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/QZVEM2533942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a015f967fa4494ef7a4d0bf9b6e7398c7425d9e7dc8ced157a8abe68124ae2d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZVEM2533943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a25731c90bcb22a0f8b4f30cdfdf797f57fecd4e186a0ea1118e51becf81b3. 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/QZVEM2533944.