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 0x23e89994e7e67a0bddda2fc59fb6ebc604f4f74f9335f34eb8ac6842fbabefbb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c17f075-0f36-42da-8be3-f3b31ac68daf.json and https://artists.proofprofile.net/proofs/artist/0c17f075-0f36-42da-8be3-f3b31ac68daf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b577aab000f01e1712e988774d14fe193e353bdb66d6548f928ceb45195fc45. 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/QZDSS1900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f31ac3c9c6046f277cdeab0296b79283b2ae71418ddab0412198c5533fdfc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDSS1900124.
Adagio in G Minor (Arr. for voice and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff5479daee7564eb7da1839b3ae764d1c5cd56962c53218a819b9f11aec75d. 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/QZDSS1900128.
Vesperae solennes de confessore, K. 339: V. Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2aa90293321f1f530e0ddf527af8799c3963ef38c0f308ac8c258f0360b738. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZDSS1900113.
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 0x02f3a50bc3127c6a8e9fc59bf3008432b36a9bfb4ae4f52b224a5680073cc539. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDSS1900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def178964e021324fe3c015eb0543ae8514336e0cbb35b177ae99d14e84539a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZDSS1900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384034b9a03a28cf8ff2f8d7c9b67e6fa6260b97a4afacb3274704894a0b68c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDSS1900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed93909e7af89997d99614fd8d2078c10f9627d60c80b684c5957432e179fef. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDSS1900117.
La forza del destino, Act II: La Vergine degli angeli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622ba866bdf67e2d5f3041a65120631c0a1d1a0f865076beb8e832be0ca9f924. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDSS1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03371add089afd660c8f4cea3d7e8ac9eabb802f4f853e359506f4d2fd5112d0. 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/QZDSS1900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5048f84e389e06c86c3a6b730096bfea7a00e668956acec9acda09e3a15b27. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZDSS1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56b20f26bbe130710734cb61793c6bcb38817adddfbd7964673ce031c78040b. 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/DEB331122501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3b60815af2a6452bc00703682a9ebcf2be2346ebb9dd425b59b3fee227941c. 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/DEB331122502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f6620a30745add4de756259641d822c970e4370925d30ed817bb21789eb77. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331122503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd89e19c4ea01ae922ab054f4c4bd54008215f259f29073fd30ead3d6b894bb1. 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/DEB331122504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76989863f9c3fa1d7d7227a6725d9e688b99454f167867c285904a012621e9d8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331122505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b0d1c755604129ae3790508d75d53d2919c1b0fad88f015b46ecffc83178a. 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/DEB331122506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb1bb7f3aa8ff7c8d589dac1b1540ffb684af2712de79827613bf5cbdf5e3d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEB331122507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70149b08f09271944d6328b4144e3d2ca250f36f9852e5301bf69fd3593aed36. 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/DEB331122508.
Schaeuble: Piano Concerto, Op. 50, Oboe Concertino, Op. 44 & Serenade, Op. 42
Hans Gál - Concertinos for violin/ cello / piano/string serenade
Serenade for String Orchestra, Op. 46: Cavatina. Lento cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f09b74e6692ddd62d2249c127cb96315c6f76367e3c79c0d7a1df403c7b3a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62304910.
Arvo Pärt: Musica Selecta - A Sequence by Manfred Eicher (Remastered 2015)
Es sang vor langen Jahren - Remastered 2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9036f303050c45cb22633ba089d555c6c0a0fcabdc5a0c3fe968811d96c41c71. 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/DEB331545401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6f49246e1ce7d8e3af3bc160e98a32af5eb8252651c028d444e3400c4fcd85. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB331545403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2318cbc1e88bb53f5cf7f842265d091a10a8bcc62d95fca5b212acb16a8abd48. 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/DEB331545405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff339d5045bffa5aa2489c960c13b6efd634f6df3426757baa7269e3d06aa4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331545406.
Cantus in memoriam Benjamin Britten - Remastered 2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5257855ba1ce655743a725ba425520dc9ee7b6824c0675718a188bfdffab03. 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/DEB331545503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2250c2fc522bf563226346df573a72ccf3e40a8e6b5f72998c4fcf0a21c6b2c0. 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/FINDE1700154.
Ēriks Ešenvalds: St. Luke Passion & Other Sacred Works
St. Luke Passion: I. Crucify Him, They All Cried
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb402b5b46af66ec36f4e7e4c26b5b64373d9fe63cac1c1822212310eec196338. 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/FINDE1600046.
Pēteris Vasks: Viola Concerto & Symphony No. 1 "Voices"
Concerto for Viola & String Orchestra: II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e230661b5b582148a07e7ad9c1cd7cb8d74eacf5243b60e3a2e360b1e329af6. 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/SEAEA1943020.
Concerto for Viola & String Orchestra: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb841c3eff1af754b25a8cf12b07f5cf41f5f74a8761bcf291b5577a8131e6c14. 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/SEAEA1943030.
Concerto for Viola & String Orchestra: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd709c31c1d8aa0d6ade9d016075dd99504282ede8b19b0c0e70a692b411d9ab8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEA1943040.
Symphony No. 1 "Voices": I. Voices of Silence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c8b7f7e178be70d910018474453d75dd132b8d5cebf56a5efacaa00454ba0. 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/SEAEA1943050.
Symphony No. 1 "Voices": II. Voices of Life
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0cfca0c8dee89d0617482b05ddde3a0e564f023238e9cabf5c02ad2fb7064. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEA1943060.
Concerto for Viola & String Orchestra: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552e44ef35772e4fdd0381e39c36dbf14b40c72b4bb610bbbce01243b3849a89. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEAEA1943010.
The Protecting Veil: I. The Protecting Veil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b6672db0ad73115fa46c7144dfb6a2f6d3c509c0dcc3e5980f523791f52a38. 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/GBLLH1958502.
Dzenītis, Tumševica, Leimane: Chamber Symphonies
Live in Riga - Beethoven: Violin Concerto, Op.61 & Vaughan Williams: The Lark Ascending
Suite for String Orchestra, Op. 1: I. Prelude: Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba80d734861195497eb0e3334e0eede93c8efc07e850280594f93a82867e9c6. 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/NLB151301053.
Romance from Pastoral Suite, Op. 19: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1d245db06ac19949ac28853a271d58e397395ae829315386c440cf906c1d26. 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/NLB151301059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972789d05303a04be6cdf23de96bcdfe163cf15b026c129b7baf6a37b6b79518. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLB151301052.
Vasks, P.: Pater Noster / Dona Nobis Pacem / Mass
Bach: Concerto in D Minor, BWV 1052: I. Allegro
Rudolf Moser: Overture to a Church concert Op. 41
The Protecting Veil: IV. The Incarnation
Harvey: Kyrie, A Collection of Original Choral Music
Latvian Radio Archive: Imants Mežaraups ups