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 0x01cf771c02bce3000b5dab0b13306a9caaf9f02d957316802065297c6e398105. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ade6adbf-cdcd-49d6-b822-0444a8774424.json and https://artists.proofprofile.net/proofs/artist/ade6adbf-cdcd-49d6-b822-0444a8774424.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 0x695c11e5b9f49d401b472b589099f9b6f40cd83013c5d543492e6ab321f99815. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IEFBK1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d56ffa04d1a8bd859f8537e3d1c50f77bde4c2dfc09960edae7406a6dad764a. 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/IEFBK1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c92bcaa6111a59b6f89e9387cb7ccebb3bee829506c51f18d8d79e4704a9e2f. 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/IEFBK1000003.
An Chéad Mháirt den Fhomhair / Na Gamhna Geala
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9877417b4f222c295bda657872ce15584a3555f15b90a963fec201197a7d0689. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/IEFBK1000004.
The Humours of Lisheen / The Munster Jig / Seán Coughlin's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7354775232b1bc55eb84c6752735c0d4ed50738e577b54de1c83271e73a96603. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/IEFBK1000005.
Tá Dhá Gabhairín Buí Agam / The Glen Cottage / I'll Tell Me Ma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6255c0e2f1e2402cb3d86c25f273da08298bdf071887ad8025c323252442262. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/IEFBK1000006.
Máirseáil Uí Shúilleabháin or O'Sullivan's March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ff6246c6a90edd9518db43b59506e52109cb66a36980873bdf521ae162a989. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/IEFBK1000007.
Eileen O'Neill / The Chancellor or Father Dollard's / The Frisco or Walshe's Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8104a4b3ce84b84e5529ae73d39787c34e05d68a90766a7dcd257613c3eac86d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IEFBK1000008.
An Buachaill Caol Dubh / On Book Hill: Quail Dove (or Debut Kill) / I Wish I Had a Kerry Cow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b613bdcebfd3e02253069775ef864385ff2c408aa286f951f9bc23d9c37c94c. 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/IEFBK1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a84100c1186abccd38df9cdaf0fb6642bdd15358198a58d359744dd7784398. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/IEFBK1000010.
The Green Cottage / The Glin Cottage / Julia's Norwegian Polka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bcf75a5c701d3c850e7fa9499c384a1c9ca64b94f9fe08185a6aac9a416b60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IEFBK1000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8774464aa3578e2eae51285e8ee5a82ae17ab45f392fd1ce73ee1704a5769b4a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IEFBK1000012.