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 0x49dded24bb894285f7efdc58d313d7a729c60d1170437f6d6929840b23d901d5. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a84bd0af-b778-43f3-b345-99dad5a74adc.json and https://artists.proofprofile.net/proofs/artist/a84bd0af-b778-43f3-b345-99dad5a74adc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x2b88b8f06804d09b13c0dfe656d066dedef63fd291d27d468abf4883d89384cd. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950071 — a six-check JSON result.
The Fairy Dance Medley: Mr Barnard / Miss Baird of Saughtonhall’s Hornpipe / The Fairy Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a412edd7adc3760a8d4d22b74f111ca47ac39f235a1186a72ad5432a53e7af6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950083 — a six-check JSON result.
Colours of Spring: Classical Music to Brighten Your Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bbc6f29d35fd0d55a57f31e5acaef694b9c26b59871c5da0b3ceea9fe62537. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650602 — a six-check JSON result.
The Red House: The Heritage of the Scottish Fiddle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dbc5eed81b6abd95e5cf9c7ba8fff85223a5ed13ea5538656caba6068bbaf7. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650601 — a six-check JSON result.
Red House Set: The Red House / Miss Russell of Blackhall / The Nine Pint Coggie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bbc6f29d35fd0d55a57f31e5acaef694b9c26b59871c5da0b3ceea9fe62537. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650602 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c32ed6c158fb3aeaea3d915b263a846db013ba2d80486f4f4495dcc0dd32b8a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650607 — a six-check JSON result.
Reel Béatrice Set: Reel Béatrice / Catharsis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43310f79306bca393cfae76fe082276a7c016bd5355876034265e546ddf1ed. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650621 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366623f9a1895299eb99bfc90bacff1fb77994c6b2aa861d0fa2babb8261fc1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650624 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036bb6c612ab5131eed31389df40053dd4409b6209ae9532b8961db2b22e1a66. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650630 — a six-check JSON result.
The Bonnie Lass o' Bon-Accord Set: The Bonnie Lass o' Bon-Accord - Tulchan Lodge - The Cameron Highlanders
Fyvie's Embrace: The Golden Age of the Scottish Fiddle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e101a67269ce058aad44b8141049df7391e4cef5663827a258a93480f36737. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b88b8f06804d09b13c0dfe656d066dedef63fd291d27d468abf4883d89384cd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950071 — a six-check JSON result.
Lady Charlotte Campbell Set: Lady Charlotte Campbell - The Marquis of Huntly's Strathspey - Miss Louisa Duff - The Cross of Inverness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c524658da7fc7862f94787c9809c5134e506392bf9aaaac1664491a207c5697. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950073 — a six-check JSON result.
Miss McPherson Set: The Marchioness of Huntly's Favourite Jig - Miss McPherson Grant's Jig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732e7a8454a0b421a54596ee66bcfccecb4d289dee3ff6127123fc8103b98393. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950075 — a six-check JSON result.
The Highlandman Set: The Wedding Ring - The Highlandman Kissed His Mother
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f874e8b535fa3704b64bfeab94c69af51c5776aab7f1e04f93f9450acdfd0f0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950077 — a six-check JSON result.
Niel Gow's Lament for the Death of his Second Wife
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d1be3a8c91172882d7e9b8eb175ce0b5f4845f58781488fb94ba7b167db6e7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950080 — a six-check JSON result.
The Fairy Dance Set: Mr Barnard - Miss Baird of Saughtonhall's Hornpipe - The Fairy Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a412edd7adc3760a8d4d22b74f111ca47ac39f235a1186a72ad5432a53e7af6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09950083 — a six-check JSON result.