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 0x2907c82035f3d71e6199f5b49e79968f6574bf30d8ffcdcd07d1f4494eff0bcb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87362c55-3604-4753-bf2d-a027bc046d64.json and https://artists.proofprofile.net/proofs/artist/87362c55-3604-4753-bf2d-a027bc046d64.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 0xff32c90a69a99faf5e6106d02f1bb697a5a7c15c57aa713f579f1aa1a9e2547d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:17Z), 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/USCGH1974206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11842dc1b34275db7235fcbbcf5da5dead3d7cee771d6bf00ea02acc727428ef. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:35:43Z), 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/USCGH1974207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a37a10f9b86f71dedbe363c8240515f05e850317fb5de16113c646a191b3c31. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGH1974208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc468d6abdd5f058c7c8af5860d9542c42c5872251076aca46ce01e361f53dae0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:02:39Z), 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/USCGH1974209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2525424e3a9daa21591d49dae42be7b234607d6aef6266c3799440c186453d1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USCGH1974210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52695523781b58a2931cf8b9343f793c7ad42ef8ec5fc650a02913f127d84655. 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/USCGH1974211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49721516e6bbab7ff122e94e328e6176357bec16c4223b8b1c1cd8a91b208c3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:24:01Z), 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/USCGH1974212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd2b11c2758cbf3591ebbc30c9985896cd617f4f0cba09299169c37b7fd6e46. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:51Z), 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/USCGH1974213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c08a92a2e0773b325b1849a84f653926481614dba44e9125342feedb3acc41. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:25Z), 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/USCGH1974214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa290cd0be9d52e55135692f3cccaf676647411b4ec83e27929839faf0842709b. 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/USCGH1974215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16bf0ae67dfc5e9649f66aba7ead619af7595e426595a9921790e38006b830. 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/USCGJ2053813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85f9307dd09338275330906c1399861fa847650002b7d435ef9d8f4e8cabf9. 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/USCGJ2037893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eafe249e3281eaeab671a412012e86700cb3c199e1cfa5f97bb836472c49db7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USX9P2074933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898c8ab6ee48142be3f7f99bc8f68649cebdbe5df2518026b1b7ec524a6c3a96. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:27:36Z), 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/USHM82202668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f589bf4607d30189144ea245b852921d1f5c75fa95835b126c89f9d2b5d6941. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:47Z), 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/USHM82393796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd4da04471710d041bec65f650b78d93f5ccecc65e1824c050267d207c3c681. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USL4R2410736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24da8662233973dcbc862144855fa101d35b574ef3aa918e0e837742cf34b500. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:32:23Z), 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/USCGH2544516.