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 0xe697222cd33203e084df4b17f06a4d98dc56ba0e01edc3c1ee3cc43f8eb6d764. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef583913-41a0-41e2-868b-bc4d5735f78b.json and https://artists.proofprofile.net/proofs/artist/ef583913-41a0-41e2-868b-bc4d5735f78b.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 0x686f596c837e8650cc337c00fba043d625079bed99942f35d337cd3e1d483766. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFF2393422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1fabbe585b8cd0d8f1b9477e3aac42f0b73b6b82ec123a345a436124defde1. 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/QZWFQ2340855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab59070022d8a4449ad1ae3d70e696226c9a09db51ea80fe57814cb4b4e0a71. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:26:56Z), 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/QZES52452586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd53530b0d788d3631e5cb99f547372419c3546b876ee126e6339d010437dc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWQ2475697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d45cb1a1243191eda31fb7b968bed3b0d58fe791913002c43e608b7eae863a. 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/QZNWQ2475698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ddeccb32f35244aa8da2089dbb65cafbcf241e401a23a32c0098ff0b5e3c83. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWQ2475699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb35ae5a6749f99d88a9bd8ea10a6da23deef42ea48e221d4ac17b370bc0a1da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAT2478688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76439f5b2f1f118f4aaba892e40f07d43b714cc81bd2c793868b70d3e9b63e6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7U2404433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe62e0439914d86d593d9939073001fd4fddb472347a154e537f99a3009dcf10. 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/QZWFL2505398.