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 0xb9dc0676d459c76e6217e772d90753073baf278247852c69fa83444bf058111d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab68c98c-5bba-47bf-b669-c9b0b0c58f33.json and https://artists.proofprofile.net/proofs/artist/ab68c98c-5bba-47bf-b669-c9b0b0c58f33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Songs of Solomon. Cycle of 33 Spiritual Songs: No. 9, Lamnatstseah binginot mizmor shir (Psalm 67)
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 0x3cb8d5dc184da1c924160704eb7b46dbf3b937c421266c3a01410961ab3a9183. 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/CZA169509398.
Pastores surgite. Latin Pastorals of the Czech Classical Period
Artophaeus, Černohorský, Vaňura: Music at Prague's Saint James Church
Kühn Mixed Choir, Pavel Kühn (Felix, Matěj, Blatný, Vycpálek)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870a7b330e7065601b79cbdbf27c68acfd714bb0d1e7fbbe31e7304f54b0b16f. 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/CZA168200771.
We Bring You Glad Tidings - I'd Like to Go to Bethlehem - The Lord Jesus Is Born
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83427dc803d2bc1ba96ac7c8d4af317196ef73d597bb885bd7c545bf33c32a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA168200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a83ff98205d3b9ebe47d8bc7276a81a24e8468ad8eec175afe0b12ea9eba9. 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/CZA168200779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3841351fbf73227ea88cd1185ab7cb42749935e7d0eac699949b0edf5caf6a3. 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/CZA168200780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c02c3c7b82434d0e176fc35fbc03565ca47259f72d99efa4780f6b4118d1a8. 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/CZA168200784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddfed21aa40a489dd8117a538e538b217043b023f6fe742ca9e8fb806c39724. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CZA168200775.
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 0x7e27ca65211f196a83b12618591669c955b2ef910c6eb53c03c03b257616a8d0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CZA168200783.
Martinů: Nipponari, Magic Nights, Czech Rhapsody
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c42c9d7d36cc573ab5d8ae91e07ef3137f2adb2273a16459e20309c85a6d0b. 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/CZA168671995.
Vycpálek, Bořkovec, Rychlík, Matys, Kalabis: Czech Choral Music
Poulenc: Figure humaine, 4 Motets and 7 Chansons
Curses and Blessings: Brahms, Eben, Novák, Messiaen
Torquato Tasso in the Music of his Contemporaries
Martinů: Male, Female and Mixed Choruses
Antonín Dvořák: The American Flag, Te Deum, American Suite, Old Folks at Home
Barber, Poulenc, Slavický, Novák, Strauss, Bach: Agnus Dei
Night on Bald Mountain (Original Version) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb175999c150fbf917b9039d06d253837732ebae3dd491e4f937617f040c66c83. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEF059304060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aadd9a8e03b58810fe4a1104035f00c61f19e40a69c9e86592de6e87929832a. 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/DEF059304070.
Salammbô, Act IV: Chorus of Priestesses - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e3a2bf57e54fd1a0c4ca544fcbd5a7edfaa27f0f7834fdd7c3a0ab01fe673c. 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/DEF059304080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7451d97d40fda30f83d09ae4bbe5d55b7d82c9bb840aed42e27f64b47f3f36cf. 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/DEF059304100.
Pictures at an Exhibition (Orch. Ravel): Promenade 1 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5f022d093ef0005cc183a35a41aeffd9c4ebcd515b1f93690fde9d884addbd. 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/DEF059304111.
Pictures at an Exhibition (Orch. Ravel): I. Gnomus - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7ce638e67cd1b013e2fe5e2b7a1a6c202e6e4725a1c6c634b2d3761ba0ea2b. 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/DEF059304112.
Pictures at an Exhibition (Orch. Ravel): II. Il castello vecchio "The Old Castle" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a0a2e606501e5fe0fe2db67a8733fcaff0100f0f9672fff01502d42bb9b1a. 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/DEF059304114.
Pictures at an Exhibition (Orch. Ravel): Promenade 3 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6159f143efeb228be5eb9d7a81ef41ee8e90c31427ea384d947d7ea4ec7a5c5. 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/DEF059304115.
Pictures at an Exhibition (Orch. Ravel): III. Tuileries - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a10e070bc2f010bd5a6839bd9b3b7b1b38754537bb0d61cc17f8ee2d806d69. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEF059304116.
Pictures at an Exhibition (Orch. Ravel): IV. Bydlo "The Oxcart" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6e7b4174426273b1863235d3dede4f8896279c06e35b65149e4e42e738c6de. 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/DEF059304117.
Pictures at an Exhibition (Orch. Ravel): Promenade 4 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55fc9bfe3c193ea82318ac4aefc2035d4b3d27130c37492b49d7b90df10ff7. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059304118.
Pictures at an Exhibition (Orch. Ravel): V. Ballet of the Chickens in Their Shells - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17cc87e0bd972f204231bcc02fecd05059b17d48f50ae2b133a0bca62d5a701. 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/DEF059304119.
Pictures at an Exhibition (Orch. Ravel): VII. The Market at Limoges - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8ef94b2866a55ac3dff7292b4d3c88a132f1a24b55916c6cb45474637fb459. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEF059300002.
Pictures at an Exhibition (Orch. Ravel): IX. The Hut on Fowl's Legs "Baba-Yaga" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c62279af56c85829942fe2bf819f5385b9ebf632b2c060972e322eff396fe5e. 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/DEF059300005.
Pictures at an Exhibition (Orch. Ravel): X. The Great Gates of Kyiv - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5529281dd451a242c79169e6aa345a7abdc063f16666eaafc83e0c0f106d76. 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/DEF059300006.
Gioacchino Rossini: Tu le sais bien, mon Dieu
Veni Creator: Penderecki, Strauss, Schönberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4aaa881f1eda85c4a5fbb1be771de25f6c102f30eecc200844d05df40d85ba. 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/CZA169301547.
Dvořák: Four Choruses, Op. 29, In Nature´s Realm, Op. 63, Novák: Twelve Lullabies
Zazni písni vznešená. Antologie dělnických zpěvů