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 0xe9f45d38143c18e6613ecac00134b07cfbe50c4e6892a75f7674f088bc83324c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deef483a-c3b5-44e8-9083-bb6a35d010f2.json and https://artists.proofprofile.net/proofs/artist/deef483a-c3b5-44e8-9083-bb6a35d010f2.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 0x98491932f5cf91839bc1a09ecdbbf4fa0951f174356c36dc6eb37da29f49e12d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:53Z), 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/CZBY92200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aab000f3cc0864631ac812d0149cf94911422ad8f48886880f2a626800bc93. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZBY92200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571a51353db3c624a2ef9c1123761a8fc4a89c6937bd7614edc070120cf0425c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZBY92200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d6f1b83b641110aeda71bf333e0f014b59c67ed0926f02ddd1badf3163a34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZBY92200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec0a12e83edec2c7349d45cb868267ceea2d245808a78a0f02df67b2fc5055. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:44:06Z), 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/CZBY92200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ffecf42945c481d34b503e239dde4e9dd4f6b27058bb7ce5dc7a2e8f2746a. 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/CZBY92200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd7cdea21a4793725b60d9c9428968e162174ff1fd2fea3cce23349565342f0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZBY92200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca748e0b3b11570fcce83c497bf6e25186dc2c9006ff20baae1319fc9d4b3079. 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/CZE052400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672ff1eee5287935f1dd56acafa473c369073dba6aa8151bbb4de8d14768b99. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CZE052400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d60049db98f1b00ae220628e0dec6c57aa0197b9cac037407e7280a5d2b33. 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/CZE052400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11702148e20f133efb6635c92ee22c9b111b3ecef44ea2b14d8153f11a049660. 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/CZE052400020.