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 0x53c781541dcaa93df5b12ca4f95e717bcd5426c1a25206a3bea7a10e8a8e02d4. 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/fe05a9a9-fd45-49c0-bb18-9c739546d61c.json and https://artists.proofprofile.net/proofs/artist/fe05a9a9-fd45-49c0-bb18-9c739546d61c.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 0x365406e30fc31e32f616f0958a82e1ee83874a63d1c16262a60eef60ff5ef387. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZPEW2590769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a38197cb8c1d4b5fb304bb894a1696f4349d3975e54cdd8e272345d3e632fb0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:14Z), 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/QT2VB2512900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca6bb6ba6b7283622d04000c2c20490cee4bc9185bdfe4414b2e12cbf933a5d. 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/QT2VB2512718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f0b48d560463ab7c65d7135e6ec5db95dd2f30e3d76998564e53a61272c2b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AEA2W2536046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686f082d0da654032b999ab7ff65890dcc4bf15c4e55137da4f344466038281. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:39Z), 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/QZVEM2542327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8491fe575a4c2d403ba2f28c9f4681a9651e828abe99fabccf68a8c585f4fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVEM2542329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e51531d2fb17527c28583bb63fdbab9ef333892465c73a65acaea4699527a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZVEM2539382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b21b3f2f93cf1e69956181cbe54639a71956ad678930fbb3c454b1eabeba52f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:09:16Z), 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/AEA2W2538118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1a3c316a6dc27c0229c94dad267b3d0e68e429912a40e04244798f1ae525b5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZVEM2564211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436c9a5c8b47628bc5f69c660ab7a6254cb44564bf9a668be9ab70cbc748b447. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZVEM2570091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bf9831d77d07998e97bf5eea914492146637d064d20ae4b42059dfac81d39c. 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/GBLFP2552575.