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 0xeae6c4af9f23463692c6db644e362eb96ae6d4aaf7e4b2bbcf064ef62f12e9db. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28743378-78b1-401d-a848-6077c237ca9c.json and https://artists.proofprofile.net/proofs/artist/28743378-78b1-401d-a848-6077c237ca9c.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 0x3c64cf1a44dca188f418b785d23e0368444266750f8c69679118d8ed00e3b8f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLWD9610001 — a six-check JSON result.
Concierto de Aranjuez: II. Adagio (Arr. for Flugelhorn and Wind Band by Kevin Bolton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48ced72ffd7fcb3e2f8dc69963a1f191d240b69fa94270bd130331ba62c7e1b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLWD9610002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f801533c4779fc9353571d50c61d5da2761ddefbf0813cad1eca037a28b80. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLWD9610003 — a six-check JSON result.
From the Shores of the Mighty Pacific (Arr. for Cornet and Wind Band by Roy Newsome)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e20c224bd48a5b342fb2a39b444235d629d7133c8c6b6bd5913f5d88acb775. 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/GBLWD9610004 — a six-check JSON result.
Abu Hassan, J. 106: Overture (Arr. for Wind Band by Gordon Langford)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb67561d6a7a5fe1bb9947b96622b927fcdef55871577ea7f9454e9f697cd1. 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/GBLWD9610005 — a six-check JSON result.
The Lark in the Clear Air (Arr. for Tenor Horn and Wind Band by Gordon Langford)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b49c062afb2fd5a3a5252c585edb09dafc51f87f2c5329f5204c681ba6356e. 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/GBLWD9610006 — a six-check JSON result.
Pines of Rome: IV. The Pines of the Appian Way (Arr. for Wind Band by Howard Snell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf260d9b8696ea86f2e24abc26ccdc684c28ad68b827f5b058da00c517a2cb80c. 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/GBLWD9610007 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab8803fcfaf35e64622a63c4ece75a38e5cef82e78153c8e4bb7904d8bc23c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9610008 — a six-check JSON result.
Riverdance (Arr. for Wind Band by Ray Farr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3913a3a7e3f62ab1944bcc98013402a1a04f10370962d1e0322a950a350952fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLWD9610009 — a six-check JSON result.
It's Alright With Me (Arr. for Wind Band by Tom Brevik)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b656f190a31643b53597283864b3b387f2100a06eb8b5225a8097b48e7613cb. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/GBLWD9610010 — a six-check JSON result.
Barnum and Bailey's Favourite March (Arr. for Wind Band by Peter Roberts)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf233dfbe3cbe63490f5c7b71025dcf5577c41591f61f4922c1cc14cd0f845b5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9610011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63f34135028d8479ebcd27d242af3465776f47e1cfb86533c75358eef58cb1c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLWD9610012 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5f2043cfc92c7d26ffda9ccff4e5a742a20e05d28c5348b49230c087b18cef. 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/GBLWD9805805 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe1b89a83ad116f1941ea6fefb0f24d253bbbe269c1bb6f933b41f8f9e234f3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9707509 — a six-check JSON result.