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 0x7417f8023ed5cdfdce5b1d090b82271357ef9a1d5bd06edcd5836023b55b4ea5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40cd06fd-603a-4921-b40b-5f3557aac9ad.json and https://artists.proofprofile.net/proofs/artist/40cd06fd-603a-4921-b40b-5f3557aac9ad.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 0x0c8c49e675db91093d3cbed0aa200056b8bcc4f92aa806bb8d8d4c2abc0b1786. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH1381303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacc5aff31777124f1169cefa288b4838dacfeb791cbbadd68f9105929d66e77. 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/USCGH1381304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427f061d06fb59c79e10205802f76addcaa108de0e118e661d24ff7b06574c55. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH1381305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b0efe6a4e46a15cf7732b94abfd23a088cb8a9f807b865446cfdc199c65947. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:40Z), 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/USCGH1381309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ee51b33478af07c5acfe23624aca4dd021ecfd365f809e682f769bff42542b. 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/USCGH1381310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6393cf5e4e5d42af0421ba4e07cf89d65386d01ae2638641dc71051146a17786. 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/USCGH1381311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0b887aef19968e83ea80f76c4ee399373fb0dcb47edeae5d30a12e7d051410. 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/USCGH1381312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d4a542511c664ae6af7f2e99e594e5aaef47753b5cec548c3c45c6929ded7f. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USCGH1381314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb537f202466d6d6e8bd95b3e2d0ab63a2ff8a744e7875569873e18155a016254. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM91830162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37ae6f10922a654cef09f84b3ad317d2f3f17ed9bcc768b7a7de29e6bba4071. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USCGH2281312.