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 0xca3b02b2e64ca3c12d9e6eed2e303069d567425856ea13c835d010f2700f93ce. 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/0b70b6d0-92d8-4806-91ad-cf6f743110ad.json and https://artists.proofprofile.net/proofs/artist/0b70b6d0-92d8-4806-91ad-cf6f743110ad.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 0xb3253b0cf46f415212cb941a9be6158db0a683b658894035b56dc4c7085fea7f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP2319416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3251a0f05c87c05b02c752732b900f7bdd831bd3a8e87bd66d1410f7c4da5407. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL3WT2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206dee8983b7c3c50b8839245ce78afdd014b6b434cd41ef379ed6ae2fcabcc7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL3WT2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7419e80582c629d08f5eb35112eaa750b5fdb73c1b84bdb5d0f2e43fb959b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL3WT2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c04e9fa21118f54b3e5cb0a7e2f07a4ef2db0696f526899ce0960b007b3e844. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL3WT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e18af49a90f9e595371ec88f4cf7292b427bf514a697b8d252fdf63abba83d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92375176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95f26ead6a840f8349a9a145fbdf02e89b7038ca9eca70aea369d123a87c86b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3Q92375175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba08bf636b6ae28bab70deaba85d9241ff8d83e8355811e406e91063d286248. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX3Q92375177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbe144addb1b22c44c2d196d41585c8ac4058424119b7844f440902c66de8b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLFP2396882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574c43a6c43e271d41f3e6591ccb7e412c40957854f10b92686db5eb73feb725. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2396883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8fdc283d6cbdfb6e0755f1f6f9a8ccd3ddbabdab3f54c4cfcd5590c8aa3a28. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2396884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8ca78a9911d9575e9812e005970c0bb70fbb05320c6e5336a81cd52abe24a1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKXN22273347.