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 0x9c3806c9fb42085eef7ed2921a11241fb9ae6e7aa329a23baedc3f5d981faa9a. 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/9d328e7f-7d01-4a80-9f36-9a232c382bea.json and https://artists.proofprofile.net/proofs/artist/9d328e7f-7d01-4a80-9f36-9a232c382bea.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 0xaf8f3e7503d41fb3af3aa167609477d832eff0b453abbd58a14f93a0b0cc5770. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR10S2217801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23038f5ccfa2b8cd72a66f3860b05d9ff785b63602521ff2f060b785ce4bc92f. 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/FRX282143332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72a58e5f62201836b4a91d61e4f7817c1bb2fac14ef1eb6c5556967a2fedafc. 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/FR96X2194936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1417f2ca6763b969bc7fd102518e90c7ef513b0e13177e932ae206a1fb4050. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX872181933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43bc2f2026a284c6f05f40b37cdb08ed3c2d7c80fe44e2a3b007457e7993bd. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FRX762128885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39da57d27cac9b543ea784f2219bdcadcd77a804a68a967034421ee2c78d563. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:35:54Z), 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/FR10S2212652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154bcce4a1865429f1eef63244f8fcbb77b8dd20a56b23e8e5534b2fd420ae4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:38:28Z), 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/FRX762221974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e136215a39ab62436113d664fc49be4f2d681996324a4a9682439cde5a3fd32. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DGA052208696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf8af01d1ec9416440136c467b1df2bf5887b933841dcf8dcab20f54c777df0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA072371731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708b6b6a99e7b4839ec5129c9f7938405b61a5c7e96093c243d0bcd465c59cf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/RUA1D2461139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d424d604541fa7f2c16064e9c94e49bab51cd30323e828d2ff18e3b1e4392f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:43Z), 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/DGA0P2474358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124cfe59e759eeb01d1d792f30f82b61d621aa57a6bc67d60365983a05d2772c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUAH62413177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47888bf7c46ff791737eec1b4ab8af1300879275e713b73d27cd77178f0d0cfb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:32:00Z), 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/DGA0T2410326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebfd760cb08ae343925e8ff4afc83ccde5be0c4c8ac8ea47514f9b3681545e9. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/RUAGT2528945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52770c96452748b3825c974cf4bc34126a660c3f0ddcb722859fdeebab8a0ce. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX872539035.