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 0x3925d6d94190721a35ef468540181217822990b2515537ef227051fb1b544ccf. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90873ddc-379b-4688-9801-85274a97fcf2.json and https://artists.proofprofile.net/proofs/artist/90873ddc-379b-4688-9801-85274a97fcf2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vanhal: Missa Solemnis in E-Flat Major, Stabat Mater in F Major & Symphony in D Major, Bryan D4
Missa solemnis in E-Flat Major: VIa. Agnus Dei
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 0x103774863f8c2489dee843ce7e2b6a3c55057a693901d9ecc907f016733074bb. 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/DEB959535316.
Vanhal: Stabat Mater in F Minor & Symphony in D Major
Nisi Dominus In G Minor, RV 608: IV. Cum Dederit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8628ba8a9705d169230cb4439fb52847e1e7bbdab9f708e91470855e69531464. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USRDG0112380.
Dvorak, Schubert & Others: Stabat mater (Remastered 2022)
Stabat mater, RV 621: No. 3, O quam tristis (Remastered 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88fafb016c1133b0126ca55db043dd6a2e626545c60d818c5abf72510ad211. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAD62205126.
Pastores surgite. Latin Pastorals of the Czech Classical Period
Antonín Dvořák: Moravské dvojzpěvy (2., 3. a 4. řada)
Moravské dvojzpěvy, 2. řada, Op. 29: III. Dyby byla kosa nabróšená
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c95783482f6292e81448ace6f3d204619c916170aa724cdccd152ffce1bb8. 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/CZD949100470.
Moravské dvojzpěvy, 3. řada, Op. 32: IV. Prsten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c24fe2fc50ad8da179a8799c344281a84384ebb7ec62007416886c471b444a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD949100476.
Moravské dvojzpěvy, 3. řada, Op. 32: VII. Zajatá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aa7a1a0cbfcfc9603752b63ed2155d174f33aa5faa527997dac3dbaa44b372. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CZD949100479.
Antonín Dvořák: Moravian Duets Op. 29, Op. 32, Op. 38 (Series II, III, IV)
Stabat Mater, Op. 58, B. 71: I. Stabat Mater dolorosa. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bbd8b0faacaeedf471adc3761a7a268fc9f08b1a3a35270e5283afa0e0901c. 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/CZA169701140.
Stabat Mater, Op. 58, B. 71: II. Quis est homo, qui non fleret. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51fd0494b60c3cb7178aba5d9b369e2c5b1feef6355d58d474beb524893c513. 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/CZA169702140.
Stabat Mater, Op. 58, B. 71: III. Eja, Mater, fons amoris. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdfa0a015a04499a86cd2e3fa8411a9efd9ecb35ed8522b2df8b410994ed7d7. 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/CZA169703140.
Stabat Mater, Op. 58, B. 71: IV. Fac, ut ardeat cor meum. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b5e6998fa4c4ccd03d0052aa3afef2fb3da3b601d302031c0b78d46afe8fdb. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CZA169704140.
Stabat Mater, Op. 58, B. 71: V. Tui nati vulnerati. Andante con moto quasi allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483513e75d637b6c4447b54ce236e9a916ff2ed841b4f66c6a2df9621db37ae. 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/CZA169705140.
Stabat Mater, Op. 58, B. 71: VI. Fac me vere tecum flere. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5bc7a7c4f5ce58ea1c860ab5c2e54d08007f9cc4125b931606aebbf0af828e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CZA169706140.
Stabat Mater, Op. 58, B. 71: VII. Virgo virginum praeclara. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911117df4aa777156eb76b792963aaf8350fcee8c1198e6e9e77af3295dafb6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CZA169707140.
Stabat Mater, Op. 58, B. 71: VIII. Fac, ut portem Christi mortem. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cfb0c5d3791b67ff9fda76b82635b714793ae9fb580b435e3631b9f7130194. 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/CZA169708140.
Stabat Mater, Op. 58, B. 71: IX. Inflammatus et accensus. Andante maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2604111812da1c22110a4d9ad3705ab2d87c3b998c28787853004d7c3ecc4f0d. 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/CZA169709140.
Stabat Mater, Op. 58, B. 71: X. Quando corpus morietur. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e111465b3a8393f376f6ef676a68ff2956707c3b7e635c2e39fbe3f6a073e29. 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/CZA169710140.
Hallelujah Chorus (from "The Messiah", HWV 56) (Alléluia (de "Le Messie")/Halleluja (aus "Der Messias"))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9b0e738bbd5dfac56324e916332ddf32eb37661df0a1b655136adef1d682a0. 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/USRDG0111046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ef95f0b648677ccf4a490016f2204cb25c86f92f5b8d8e6a5d164aeba2b8a1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEB339353901.
Haydn: Missa Cellensis - Jommelli: Te Deum & Mass in D Major