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 0xf491fdb2012298cc5466fb1e7c10d061615161a8098ce808ec82697a6ead148b. 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/51e4c072-a3cf-4694-9f87-3048151a60de.json and https://artists.proofprofile.net/proofs/artist/51e4c072-a3cf-4694-9f87-3048151a60de.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 0x5f8ef72a24469739a62f758f6cf9970083f128d6b021be28de9f78d0757ab9bd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB62371616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8249134bfe6ce5ff312a73c1f1991a06985be1e88a6c49464a49019ed6404b. 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/QZFZ42492431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67b09bc17b709d0a93214cd40285dcce00d649ee8cecc99728e6c75330225ae. 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/QZMEN2434174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58784578ded98308c327616ce9f3fabd267a1cf3490dcb18974f731eb882c17. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZMEN2434177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6471d41cd372d101092bd8e5ea6747f5a891a0c4821ffb8278de7f0b8d0686. 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/QZHNC2485026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574adf900f929d8a2aa341c9a5c3aa1264a56c6281ec2c4ed21ef85c62539e9. 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/QZMEN2434183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e4dbc62c8bd9e8a9e75240daec6051253c07335632d595153055a31cb74f9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN42410072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc79bced683840677902b27a99595467f4caf01af554fb2c3966f0c1b1f4137. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZTB42491150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01362fd38333e6bcb48da4413181554e9c31eba57f56dda042fec1722ba3926a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFV2489913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa325ac6559c1d6ac06c493acfda65c9e98e0753af179812d9ba1e3a97f9cc8cb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZ7M2429032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7888f637742e7dd40d39f02cf01028f481a95e68f91a8e3e715248083c6d49a9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7S2481412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfd3fc774c091d87594be66f827c33efc73e17297bab6ad4f35dde7329929b2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYX2504066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4cfd1b1d91a88865337224d2edbe3a0d9f129fa7d80741eaf4fb43ef791cf6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:21Z), 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/QZDA72571726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c46b72b1c174c99b48d79bc027234e8550787ef2117e958306bbb8de2217d4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA72571727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1085aa49f113a33b506c5cc8696c01c5b3466db258d8b97dced2ccd17c774031. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2505696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73713ec0e2f0ec5358dd7ce6fbdbe2cd81ddfaef5f1bfee3e6f11ebd3d011ba. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:49Z), 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/QZNWZ2585536.