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 0xbec203a73a8e52318001ff6c807a89808907183186a9f3fa50be5bc28d01828c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/699d78e2-b509-46c5-8dc9-970b46580e43.json and https://artists.proofprofile.net/proofs/artist/699d78e2-b509-46c5-8dc9-970b46580e43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Baroque Trumpet Concertos - Fasch / Zelenka. / Graun/ Telemann / Vivaldi / Pisendel / Quantz
Concerto in F major: Concerto in F major: I. Allegro
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 0xf98b9db0a48b02bb83ff523624c15dba6fae73aab576c8810e6323a2bdb79c78. 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/DES380012312.
Concerto for 3 Corni da caccia, 2 Oboes and Violin in D major, TWV 54:D2: Concerto for 3 Corni da caccia, 2 Oboes and Violin in D major, TWV 54:D2: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bbc00c20951341caf3c96f94e4fe9d7aeeb303c82d6a2fcac19c09e63dd6d1. 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/DES380012314.
Concerto for 2 Trumpets, 2 Horns, 2 Oboes and Bassoon in D major: Concerto for 2 Trumpets, 2 Horns, 2 Oboes and Bassoon in D major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f38d250de04ee63c5cc643fff5c189705704bcbf942e460597937cbb8274df. 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/DES380012315.
Flute Concertos (Baroque) – Quantz. J.J. / Heinichen, J.D. / Buffardin, P.-G. / Hasse, J.A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657cf7714163e312b61d58a82fd99486f81955a83b7a32d6a2cd22320bf3e2ad. 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/USB8U1009813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c380cf9371ccd0be1c93292ab362a9a66ec9cf4cf3a13ca4d0e30a2b44cd660. 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/DES380011045.
Concertpiece in F Major, Op. 86: II. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23230ef2781a873cafdb23a6bf1ce124600388ab95e8291ee39f409642a8b544. 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/DES380011047.
Sinfonia Pastorale per il Santissimo Natale in D Major, Op. 2, No. 12: I. Largo
Carl Philipp Emanuel Bach Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835050e84ec5054b0d81b9f0ec52941b6e577abe1c9a93dd72a10f6f1a3ef226. 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/USSM19910684.
Concerto Grosso per il Santissimo Natale in C Major, Op. 3, No. 12: I. Pastorale. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72804444291aa6f60424777e89cf3bf1449c1570f710abdaabafb6acc96519c8. 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/USSM19910698.
Concerto Grosso in G Minor, Op. 6, No. 8 "Christmas Concerto": III. Adagio - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6731c2ecc6c6e45e0d78ceee68dbbb99925173d9306a41b7e5a2aef4f43d2d. 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/USSM19910703.
Sinfonia Pastorale in D Major, Op. 4, No. 2: I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721f5b869ded5c5e794106c0f842d7912d2e795f95c77ab947faea92f46e28b3. 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/USSM19910680.
Ouverture-Suite No. 3 in B-flat Major, TWV 55:B1: II. Bergerie. Un peu vivement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5283a615911677e97a2307b25173bd49836babfe376123fdcbb73693bad1fa7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USSM16701135.
Ouverture-Suite No. 3 in B-flat Major, TWV 55:B1: VII. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7f3e45885c41f54e13b233879780f770d957bfbafc90c79236541f91b0b80. 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/USSM16701140.
Soanata for Trumpet, Strings and Continuo in D Major, TWV Anh. 41:D4: II. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6e2e7f3334e84feac9f3311a1535eb28a18eb3fdc40a10d89c9ab8dcccba40. 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/DEE860201147.
Suite for Violin and Strings in A Major, TWV 55:A8: II. Passepied I / II
Chamber Orchestra of St. Petersburg Philharmony
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec1f784ce4f0770d63c4b469835f946301412ee9997e48e1c2d8e886182acb9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USSM10016417.
Concerto for Viola d'amore, Oboe d'amore and Flute in E Major, TWV 53:E1: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c56169f0804bc69fd1b3df65972df62002fb9c73f0b6d1788dbbf7cdf936b3. 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/USSM19910676.
Concerto for Viola d'amore, Oboe d'amore and Flute in E Major, TWV 53:E1: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f96d06aa2413ebfecb4db158b6ca6b1f7c2f73d55da23bbbf0e6c9a8eb71e0. 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/USSM19910679.
Ouverture-Suite in A Major, TWV 55:A5: IV. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828454bfd6d7e043de0c35d72993107322be18039344538cfbae7875e7b8676c. 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/DEP629501552.
Concerto for Viola d'amore, Oboe d'amore and Flute in E Major, TWV 53:E1: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd3890b8fad139888da93d864902998fd7015ed0004818efeeede180f8355b. 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/USSM19910677.
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
Concerto for Viola d'amore, Oboe d'amore and Flute in E Major, TWV 53:E1: III. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261eaee9c1a7568172cf8abaaef0745a6ae2085546410e8518e1d6aaf1f51b4f. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USSM19910678.
Johann Sebastian Bach: Brandenburg Concerto No. 4 / Georg Philipp Telemann: Concerto for 3 Violins in F Major / Johann Wilhelm Hertel: Trumpet Concerto in D Major