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 0xe6961c759df79494ac3a44c044c0aaf8e43905d17055ebcc0fcdeb8e53bc4d2e. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b416f85-365b-46b2-8e5d-8597178d6b9e.json and https://artists.proofprofile.net/proofs/artist/8b416f85-365b-46b2-8e5d-8597178d6b9e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Mass in C Major & Other Sacred Works
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 0xfe169895f1b5ed116d9c0a99b1542defd528401d19a64f6ecf8fc5bc1a8d243c. 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/HKI191933001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a72038752ef2a0e2605e5715c0e70e4cc0a6cc90c40052760f3bd22120e60e. 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/HKI191933002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ad952a8f12aac2edc6cf8c36cca25c46cd09f54afcec5561ee361d2ace1843. 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/HKI191933003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f535ecf88da833b9f4a107d90b03bf22d25171447632ef4e8e0a68759147fa. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/HKI191933004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd038c7ede2d973604990ca20e01d11ee308870d13bf9638732ce90b0ed6352b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HKI191933005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a41ddfeb8cda1d3f28f6978aed9ce00ff81a4166edaca118e9b1bafbaf03ba. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKI191933006.
Meeresstille und glückliche Fahrt, Op. 112
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56168575c01486874320e02d041b7f4ae3dda94a1c59361545690347da84def0. 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/HKI191933007.
Sibelius: Jedermann, 2 Pieces & In memoriam
Sibelius: Complete Works for Mixed Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2584b2d76a44e7f3c0a20a85b812c8181b2ba95220f0fb4d4c350ce9bffcbb. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FINDE1400201.
The Sibelius Edition, Vol. 11: Choral Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a778f00adba03228708dd7f7d61da3e04385a091e5da5d82d2faee3f71a44. 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/SEAET1030270.
Shostakovich: The Execution of Stepan Razin, Zoya Suite & Suite on Finnish Themes
Rautavaara, E.: Auringon Talo (The House of the Sun) [Opera]
Choral Concert: Yl Male Voice Choir - Linkola, J. / Schubert, F. / Godzinsky, G. / Fougstedt, N. / Lindstrom, E. (Sulle Kauneimmat Lauluni Laulan)
Erkki Melartin: Complete Works for Male Choir
Nyt tähtitarhoihin laulu soi: Suomen Kansallisoopperan Joulu
Sallinen, A.: Kuningas Lahtee Ranskaan (The King Goes Forth To France) [Opera]
Hyvässä Turvassa - Lauluja Jumalan Huolenpidosta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1ba9f9fbc52678303e37d028ded605708da9836735f5d0ff128973a1c08da1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FIMN80500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0979e89d85fdc16b38b859b32caefe55a0eaad08548de7f19fa8c3ba1d962edb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FIMN80500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e7b613a8e388a0246da24a6903c720ce7b531020127798bd6e490fa0d3730f. 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/FIMN80500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc7e9df96d05806001f6ebdc851930b057db36396b5e1fcee0172ce1b254a3. 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/FIMN80500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46feb687b6231a9f8d9f1e131767c4ebbc6898fa4953d3f402bce2e553616167. 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/FIMN80500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01165a6e96fa4c3ca7f13a3f54c7145233ee1f754bf2b409b8ce1d3bf5d93d50. 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/FIMN80500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca53cb28c6f1b4701c6a7489813385454d8ab43ee8fb96c53cbc26479e589fd. 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/FIMN80500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d0ba5bdcd2db7376b4d1841d4ab423128e8a903ecf3786ac69d54e5bda2111. 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/FIMN80500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da406cdfd7aff4da7923a64959f3a855325930c448294ec42d7f3e94ef219f7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FIMN80500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8923beeaf3a4b54c504eb332434fcfa06b3705efe3e0d3c4b658775801a75. 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/FIMN80500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68a6a61ef4709095d70a97c6a4038ed54e7d45a87ec5aea0eb9b982229c9b4. 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/FIMN80500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426e2e3fdc4d059e0be2e0295799d9472f0b24ffc07827a21c6c86b5d754698d. 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/FIMN80500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780cb316e57cd47917da60577699f9ad79b0d94c647346c0db0f1038f0dc8375. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FIMN80500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8141fd4cecade72366642b644aefc1eec79e8a8f425fedce3f6e0bb7c1a3e3. 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/FIMN80500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5763591d393c973df33b09bcd1ae2bda6d5ca5f415d087eccc7ac5bfa31a72. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FIMN80500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895f7212311d94fffe22c20d6867717f58cd3984ddfe77f6b2d2848ccb5f2f43. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FIMN80500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d7143fc044c646505ad2981c1a1992e46f3d326806ad37d60373b33b629e3. 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/FIMN80500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59da2bb5736e812530c94caee7cd415015c0838dc186f3b003d9389151f201e. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FIMN80500019.
Rautavaara, E.: Choral Music for Male Choir (Complete)
Madetoja: Orchestral Works, Vol. 5 – A Sea of Stars