thumb The Capella Bydgostiensis is one of the leading Polish chamber orchestras. It has been operating in Bydgoszcz, Kuyavian–Pomeranian Voivodeship, Poland since 1962. History The predecessor of Cap
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 0xef02b215b65b98468f380e42a7cd15ca260b1d6adbf8975033a58ba4c488a48f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/524a747d-9daa-418a-bb1e-61fb73492cf3.json and https://artists.proofprofile.net/proofs/artist/524a747d-9daa-418a-bb1e-61fb73492cf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Magnificat: I. Magnificat anima mea Dominum
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 0x96b7e46e51ecdcf96682c5be6665d7de588be1beba4439c4c196cfe3c01e9440. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/PLA161634301.
Hungarian Dance No. 5 in G Minor: Allegro, Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd4c25967b99977153220b94fa8e452d5f0a0f3e4cc0dea6aa456aec05d68b2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEWDL0780305.
Three Gymnopédies (1888): Gymnopédie No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0faf339024179862ffab018effaeefa39ab5effae86d8000a0b6ed6a742b362. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAEI9777230.
Three Gymnopédies (1888): Gymnopédie No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46aa16cc8779dfd98eb1a3848c1f1cc016dec16402667cac6fbe126104ad8c8. 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/SEAEI9777240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfe1856bd5f105b5623e78c30521618d694961a0d3270563a284943982dad5f. 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/SEAEI9777020.
Gesang der Geister über den Wassern (C Major), Op. 167/D.714
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210c2dbe2d15b0e453ae6660db5711ed20d2e02812cba521e696859fa3fc5e2. 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/SEAEK0033150.
Suite Antiga, Op. 11: I. Minuetto: Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457924ee41dbaa3329a3d6c9c08939ee201bc6647572c215959a639d4d7f66e8. 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/PLA161219001.
Quatro momentos No. 3: I. Tempo de Marcatu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4c5b54698e9a59d7705887bca08f56d7a0014facd56eca42e87b17687a53d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PLA161219004.
Bacewicz: Symphony for String Orchestra, Concerto for String Orchestra & Piano Quintet No. 1
Concerto for String Orchestra: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b131f926beb44a3aa695496abd8d0be76e322497f6d06735a9ad1203f55f0ff. 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/HKI191403301.
Concerto for String Orchestra: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7940c21d16354fc028ee20529492bcf8c98e291a1f749a3c6850b679f8a2aa97. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKI191403302.
Concerto for String Orchestra: III. Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c39ee4ab4fa23799c8bea9d295d66eb4734eb56e7091559b95294823932d6c. 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/HKI191403303.
Symphony for String Orchestra: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265b7bdca0a660b71e3b9e54e35cb53aaaec3a8094607b93d08e8b99c4d3c75b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKI191403304.
Symphony for String Orchestra: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e42497418e5600469343d3b9ed6dde04552f02b0f6d49c9c7c59824b64f827. 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/HKI191403305.
Symphony for String Orchestra: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da2cc443df57883c3fee72f5967b7c3a5bb258ab0a23966224fa11752bff63f. 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/HKI191403306.
Symphony for String Orchestra: IV. Theme with Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb436a27b813aa730791e61492bb1bf8d1bc86177b6d466f132c59993141c83. 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/HKI191403307.
Piano Quintet No. 1: I. Moderato molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71577cd21173fa3137a920b6326efdcf9806113760b1265463b7f8b0d1eb9a45. 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/HKI191403308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3476b468dc3da64e246b16b0310852859071b1c989fb42ed1a6a0a0616877ef9. 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/HKI191403309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3a1d4f6b75fae2f7152d3ad99205d7d57f2391c55b2a86deecec00f46c4a74. 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/PLA291600303.
Karlowicz, M.: Serenade, Op. 2 / Gorecki, H.: 3 Pieces in Old Style / Kilar, W.: Orawa
4 Impromptus, D. 935: No. 2, Impromptu in A-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c95288cb175eda88b18554ec9190171cf1d0edba24ae40417350782bfe3a4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEWDL6018078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ace2d6d8cb58280efcc9f22087f59869f47d36db864619c4ed69d3c12c384. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/SEWDL0772104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119b546f784970f85041ae640f1fe3805b10c80e89c3a07ac258b7deecc7511c. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/SEWDL0566205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45f411b59cad9099834992ab6a7923d0e9a4534965be422e7c2996db6808382. 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/CAM460670091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015d1e8fe0bf0c72a9c71325b57ff876fb10e4fa55ed5fd435483b00186d642c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEWDL0721002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c09a82e3f083bb40deb801efaa0c6f42669fdd56545e65e44d546008e2de5a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEWDL0730805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ace2d6d8cb58280efcc9f22087f59869f47d36db864619c4ed69d3c12c384. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEWDL0772104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119b546f784970f85041ae640f1fe3805b10c80e89c3a07ac258b7deecc7511c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SEWDL0566205.
Symphony No. 6 in C Major, D. 589: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c799bff290ef1088d0eb7c684e340e052e2451be233abb35393a898c94c383e. 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/SEAED8887060.
4 Impromptus, D. 899: No. 3, Impromptu in G-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea673c6d188d765bc847f494683b80aabc5243bbf552d12dc465d53302e5774f. 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/SEWDL6018067.