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 0x98286a8371b9f5cde498f3d10060f263221ff08556aca873b8a0d18896da5236. 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/83a6a006-383c-4850-81ca-3de46709a25e.json and https://artists.proofprofile.net/proofs/artist/83a6a006-383c-4850-81ca-3de46709a25e.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 0x13de348c3cdbe773fea8ade1897b8ccde53ad3b89761035806a1c82399af151e. 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/USCW61945601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1720d4b1c190b69cb5f2e8f01bc873f958a34d672dd7443b1c508f5eed652a12. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USCW61913703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1645b4b54c8d5be10426610db59062d0516a44c68fa913903ceb6e40b86bcb. 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/USCW61913706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece9dfa07b8c3a05c4a454f72867e305c3aa33416b7f5c134971420b7a10bec7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:24:18Z), 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/USCW61913707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72737bc2473bd9e3610e29f90132872df93918d214faec967d7de8639feb81c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCW61913709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684fa6f9b3fcd06f308f95d3e0cde270a77708e349d54e1a626ef58f8e7ec157. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USCW61913702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d458539fcd42e65db4beb25ce6c596a858394e98d6c57f0739d9e6382e7524. 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/USCW61913705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8299792a70960ac331010e8fd1b66d6110f60518e62eb5f86f0484199cd2c2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCW61945701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bc31606150c5bccaf8919d0928f04301014f4d3c0d9e1362e31fd0ede3c712. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCW62395601.