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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6b2e687885a3867d2fa7c9049a4f6021d55306bba3ae6afd71d17fef87400. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8bd644f-6cb4-4fbe-a707-078eabde3935.json and https://artists.proofprofile.net/proofs/artist/f8bd644f-6cb4-4fbe-a707-078eabde3935.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c67638b13cf95a91ade555d17cd3c11e392726aa7634564ba70c61c3bbbbbc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY42332711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f9825fddef93503f467d6fca3b070f0f7b92bcb17e5e33807996b20ff6dda2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY42332721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468373b4ced907ffa03f108d34f7d020b88ee07782a2a1b7c4d541aff67d2e98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMAAK1882919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e4dbc6b89d3497a3102c3519e68feaeb6808b6f43f2e3b0b45efaf0cbdcd36. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USCGH0970234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6603d55d864835e0850a0e18512fc7c289c022342e5a07efea6a641b7927ee7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P0668191.
Marc Gunn's Irish & Celtic Music Podcast Presents... Victims Of Irish Music
Cooley's Reel / Sporting Paddy / Toss The Feathers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3203eab7bf09d9aa99103c7ae7512b6bc874c1794a3be18b195bc6075c5f9b9a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH0779910.
Sleeping Under The Tables / Musical Priest / Salamanca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003f213e3d1ebe6e0ca0f26cba9e22bece5d0cc7710e8e3e8505912aa77cb73a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH0779911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc173893cc875e48100629b144625c8deb98008ea04fe07d2c158fa06d1427b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH0779913.
The Gneeveguilla Reel / Drag Her Round The Road / The Golden Keyboar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164b16c0cf89ae0e85427fb6b956ae27e62912ac9c8551353a126b36e2f7545. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH0779914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f8c45070f7c90400f72f44dbde5ec19f62c4cc55ad51a0101e51bd1a4a811b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USCGH0779918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33de9dce27352387001c62506832686d75baa800b106ee22b74894d401b8a7e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USCGH0779919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f7b9570695b580f974bea7c89f6eec2f8dd90620e37b482b2e28fd33cff5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH0779921.
Campbell's Farewell To Red Gap / Newcastle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe052792737d3e8097cbadd986d97be0442aa4f7716664f939eb5282fdf6e7821. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USCGH0779925.