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 0x4a9746cb04946e5e369cec1a0f791e2d5326ce917cb81d916d92fc9ef441795c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/863e44aa-f540-4d91-acf0-9899ce4bf7af.json and https://artists.proofprofile.net/proofs/artist/863e44aa-f540-4d91-acf0-9899ce4bf7af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
James Wood: Sprint Festival with Lamentations & Village Burial with Fire
Edition Musikfabrik, Vol. 06 - Nach Innen
Edition Musikfabrik, Vol. 04 - Schattenspiele
Harrison Birtwistle, Music for Wind and Percussion
High Renaissance: Choral Polyphony from the Low Countries
The Brightest Heaven of Invention: Flemish Polyphony of the High Renaissance
Bergman: Hathor Suite, Nox, Bim Bam Bum & Fåglarna
Pierre De La Rue: Requiem - Josquin Desprez: Mass - Hercules dux Ferrariae - Deploration
Ruth Crawford Seeger: Music for Small Orchestra; Study in Mixed Accents; Three Songs; Three Chants; String Quartet; Two Ricercari; Andante for String Orchestra; Rissolty Rossolty; Suite for W
Music for Small Orchestra (1926): 1. Slow, pensive
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 0xe388b8bc95479fab2dda3e37d666647a26ab87bd62cabb39a5b016251a8ed2ab. 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/DEF059604381.
Music for Small Orchestra (1926): 2. In roguish humor. Not fast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe876f52a3e578ab0bb9f39a4ae6fe6f5064d52e8b63b74c436406dd38580709f. 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/DEF059604382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08044852544f9dd16ba5aad2e59161190605cf63ded3f091240475f6fac2b8f3. 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/DEF059604400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe8397b8b22adb13bd426308711aafa62b7ed55378363d3013627986ed23618. 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/DEF059604411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deb767c6d6c84733c20190db0042ca43d1cac488698c44dae48775ba6df8106. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF059604422.
String Quartet 1931: 4. Allegro possibile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81066b94e3eceefcc9332796c493f58819311793ea67f62858aec6013fe9760c. 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/DEF059604424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9aa08ad612afc60ddf8e45acc8feae8ce9f37024a13979fa8981ed74a6ac42. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF059604440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a64861b2544c45c1e5a3cdf44086ef91f7a8e48f8c8f05faa7bba08fe37f0. 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/DEF059604450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2171bfed34384528ae6144574a8bff8560a40bca0ac1c58d6a90ab583f9e4aa1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF059604460.
Dallapiccola: Canti di prigionia, Frammenti di Saffo ed altre opere vocali
Dallapiccola: 6 Cori di Michelangelo Buonarroti il giovane: No. 1, Il coro delle Malmaritate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e84878750dd5bd0fdd49340f549f5f95d77e65f1085d9649301a1d54260c0d. 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/FRZ209212801.
James Wood: 2 Men Meet, Each Presuming the Other to Be from a Distant Planet
Bach: Dialogkantaten (International Version)
James Wood: Cloud-Polyphonies & Tongues of Fire
Gesualdo: Sacrae Cantiones Liber secundus
Celtic Wings (Celtic Metal Music from Keltia musique, Brittany)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceec5b67a6d47d4bfde0fc8938181c81019aea1885231bd59f540bce5ec62092. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRY471255604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8898e215482bf8fbf13c3a82c4eac822f98860e3d9f0a48d10cf552756d19c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRY471255607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8ec55ed329980d45df9f54898b0ddda1418c669fbaed2037a770e2a8bac1ff. 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/FRY471255608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea69ff52a265d85b1d79b0cb6520e6530c8c1eba8de238b6a8c6241b8fe51a48. 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/FRY471255609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09ec8913725d8d5263db82c37487e26fe5b8537614e943c76ed5be84875684b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJX9138929.
Pub Saint Patrick, Vol. 2 (Celtic Rock) [L'After by Keltia Musique]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8898e215482bf8fbf13c3a82c4eac822f98860e3d9f0a48d10cf552756d19c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRY471255607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965b0d29501fcfd1face8a98293b25f71479e6db7d0493d966bbed592b147f1. 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/FRY471052512.
A Golden Treasury of Ancient Instruments
harmonia mundi - Spring Summer 2013, hmnews
Frank Denyer, Finding refuge in the remains
Lev Abeliovich: Piano Concerto / Piano Trio / Aria / Songs
J. Wood, Cage & Ferneyhough: Contemporary Works