1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xe9c325144d462b311f642f90cc2784a8d2775f0395284a8ea930eece6e00d0c9. 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/d6c43009-6014-4c74-aa42-e2bd3e7aa366.json and https://artists.proofprofile.net/proofs/artist/d6c43009-6014-4c74-aa42-e2bd3e7aa366.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kilar, Penderecki, Borkowski, Łukaszewski, Chyrzyński, Kowalski-Banasewicz
Krzysztof Penderecki: Veni creator spiritus
Marcel Chyrzyński: ...similes esse bestiis...
Paweł Łukaszewski: Hommage à Edith Stein, I. Tagesgebet
Paweł Łukaszewski: Hommage à Edith Stein, II. Gabengebet
Paweł Łukaszewski: Hommage à Edith Stein, III. Schlussgebet
Quincunx: III. Jak się najlepiej opędzać od szerszenia
Dwie pieśni kaszubskie: I. W cemnym lese
Òwczórz (z cyklu „8 pieśni kaszubskich”)
Ach, mój wiónku lewańdowi (z cyklu „20 pieśni kaszubskich”)
Szëmiała leszczëna (z cyklu „20 pieśni kaszubskich”)
Mòdré òczka (z cyklu „20 pieśni kaszubskich”)
Marëszka (z cyklu „20 pieśni kaszubskich”)
Apocalypsis: No. 2, Misterioso con dolcezza
6 Pieśni, Op. 18: No. 4, Nad wodą wielką i czystą (Arr. I. Łukaszewski)
4 Pieśni, Op. 7 (Arr. I. Łukaszewski): No. 1, Gdy ostatnia róża zwiędła
4 Pieśni, Op. 7 (Arr. I. Łukaszewski): No. 2, Siwy koniu
4 Pieśni, Op. 7 (Arr. I. Łukaszewski): No. 3, Szumi w gaju brzezina
4 Pieśni, Op. 7 (Arr. I. Łukaszewski): No. 4, Chłopca mego mi zabrali
17 Pieśni, Op. 74 (Excerpts Arr. I. Łukaszewski): No. 1, Życzenie
17 Pieśni, Op. 74 (Excerpts Arr. I. Łukaszewski): No. 9, Melodia
17 Pieśni, Op. 74 (Excerpts Arr. I. Łukaszewski): No. 8, Śliczny chłopiec
Michał Łukasz Niżyński: Sub tuum praesidium
Bartosz Kowalski: Crucifixus… et resurrexit
Stephan Nicolay: In Galiliea est Dominus
Hideyuki Nishimura: Caritas nunquam excidit
Dariusz Przybylski: …et desiderabunt mori…
Rafał Janiak: Et in templo omnis loquetur gloriam
Paweł Łukaszewski: Sacred Music II Vesperae pro defunctis / Stabat mater / Icon
Thibaut De Champagne: Seignor, Sachies, Qui or Ne S'En Ira / Guiot De Dijon: Chanterai Por Mon Corage (Crusaders)
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 → block OTSBitcoinBlock must exist at that height 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 0x5539c1ca9a57a5235244cd7b573c3c98cfecc570f3762de88daa32cd398e4ec7. 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/DEB909600901.
Seignor, sachies, qui or ne s'en ira (chanson de croisade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3a725d4c5ea330e88a76eb770be98db96a8c8548765a8e600479416ff6753. 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/DEB909600902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be10fd585072e13d73528721397c0c407ad8871800189d0fc212ec8699a225. 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/DEB909600903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc8fd755d14da1be30cfeac9d0334809827b6af323931e537574bd8e66ff9d. 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/DEB909600906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0f713a4f8d1560ab97592c9d261696c117e2f49c6ea96859fe480c9cd410f. 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/DEB909600907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b66f6d56d3caa7d454d7e9dc70d3696d793413a5c21e315605fdd64f8e0f3. 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/DEB909600908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b1dcdf3410783c0996add5a55f5903b99a98ac4e7aa97f2f19c206c2d99ead. 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/DEB909600909.
Nu alrest leb ich mir werde, "Palastinalied"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2455e41ba637fefb33ee78587ff1c69ca6ab3b30c7f3392420a075a3e1221a12. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB909600911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a276f248f49bae245c915ef770daa0ca5ad113b6a78c24b9a2180524f6be7b2. 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/DEB909600912.