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 0x1f2246d4ab5db8b400be7b11e1ddb687dde89e3dbf9b020e20e0ca8651681199. 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/d4698e90-53e1-4b4b-aa24-0097578ba11a.json and https://artists.proofprofile.net/proofs/artist/d4698e90-53e1-4b4b-aa24-0097578ba11a.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 0xf7c5f9cbca19ba1a6a3c38d69cf063bcb886c3450dfcd64e1fa0743ee302a30c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:19Z), 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/QZK6Q2319911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb68b43b844e02e2945acb037589ea4261ff5ffbf007a9e7a49e0a1dc2c08da1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAS2237552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fa48209c843d7450a080e5c7558c3c5fa130db7c0ad57330aa80e6dcf5b7d2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:42:22Z), 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/QZTAY2285032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddecbda375509448ba72882e909320f6ed818303a4475f932a00b7984fe5014. 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/QZTAY2286190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f450a2c3b116b35fa94c92a1de8c5a84937fe40402e63385e95c5a47c5648a4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:33Z), 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/QZTAZ2244153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd3fd3800cc49abff65cd83e28629f54bde036475e5ac10092447494404ef95. 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/GX38U2435986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f10832d1feb3ec007948e8ad915d506bba7eb28a19d904d25f97edc42a3d3a. 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/QZTB52409919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ec6ec4288ab13a23477f983e093008803190170a6ab1adbb8288d84a10ca4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJL2505070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882f50ccb4a22dfcc80033a35e58ea9d0f1b6ec10591ef5f804f100897c7d3c. 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/GX38U2568859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1948d82a8fbe94c0daa5efbdc965713c47cfff7596207da0536a5e7d1e1bee14. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GXESV2566117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5457a49cb3918bf1dd6695c66b1f3be2023ad6a0f89bc58a74e03a9a897dd1c9. 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/QT65X2542341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf400ce2c9c54e65dafb49ebf8501cb1f51e3e7232f6a698b1a12ba702e6e8ef0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:10:43Z), 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/QT65Y2566993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111436131055d2ac857573850bab60660d2c5c74703d5bb41bacf232e975ce77. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:38Z), 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/QT6622510957.