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 0x94c5ceac6406179a2bfeb2fbb5faa54c16a429641d3a105c53ca48181d8e213d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa899347-99df-4c55-80d8-47ad1313166c.json and https://artists.proofprofile.net/proofs/artist/aa899347-99df-4c55-80d8-47ad1313166c.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 0x70d85edb04aad10edbb9d49f39bd8b6f5c5e2cef3cd9f3aff9310430ad690534. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ32111869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261d914600984ef79c8bc706aef811d1f6195b47376788bbbeeca4c4e729c055. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/QZK6J2296407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f86a6a8f896c20f9ee8375a3cd3d792ce82bcf8663a57ae99064f7bea7e4744. 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/QZMER2237631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b18d137a22c82dd5b0bd53676c30ba6541cc3912d60f8f576abba04bccb436. 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/QZPLS2225595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892bee57872da829af58a5f8e2232be01a3a02d67f82f6fb0276a89f7f8b635. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:56:56Z), 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/QZTAZ2211262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3a3ee7fa4b24be9af12ac633478f4fae61a8af7bc63c5f2d8a5a5c60515296. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB82411785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69219e383383e5084c8d90b98604e3aaf708fd41e18503d650ffc267d788196f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882514365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e22ef92438f722deeb36dda27003b297dcb401fdf459b578390399153e9f84. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:34Z), 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/QZNWW2533391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bcadc2d957be3706b5d528279b9a0d6075a7fedf9b06fbb9ea43258527645f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWW2533392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708ad61cc98f0cb73b11d6a276df8f227f5e9f6c7723b77990ed729335181693. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:30Z), 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/QZZ7V2595268.