thumb|Johan Joachim Agrell by Valentin Daniel Preisler (1754) Johan Joachim Agrell (1 February 170119 January 1765) was a late German/Swedish baroque composer. He was born in Löth parish, Memming di
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 0xa04375116f395cef24b429b78e58abe5292ebd9310164a65fcd04ab614a86193. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/457f08b4-755b-45af-acd2-3e47767bc152.json and https://artists.proofprofile.net/proofs/artist/457f08b4-755b-45af-acd2-3e47767bc152.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xd8fac56e16df7c8a49c5082b8db3a459565bb9974c997a99353b92bcd895ef78. 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/DEP460002357.
Johan Joachim Agrell: 6 Works for Orchestra
Sinfonia in D Major SheA 111345: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37bb005ce5a08fbe90d10168a755fd56ac948c38431fa6e48b3420b73f26b30. 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/SEBAA2203001.
Sinfonia in D Major SheA 111345: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7709064bb0089dcc2ea65e46c0be1c2c06ec2d6507d5db19e0b6a632caa045. 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/SEBAA2203002.
Sinfonia in D Major SheA 111345: III. Menuet & trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bc5318c322117aa915ebf4dc093b91178743aae58b415830de4f52468ebc1f. 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/SEBAA2203003.
Sinfonia in D Major SheA 111345: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef94763fe2ad827423f074cab4591a20d53d1e20d710033b730a549421f567a. 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/SEBAA2203004.
Sinfonia in B-Flat Major SheA 551533: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17b9e904f9122696c967343f4bbab2eebee1694592e2db620eab34c618c1bec. 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/SEBAA2203005.
Sinfonia in B-Flat Major SheA 551533: II. Affetuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c3ce6b0f892bef9181f4c844544a027b2dce9120ab939ff2cc3a125cfd9acb. 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/SEBAA2203006.
Sinfonia in B-Flat Major SheA 551533: III. Presto assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3884a7763ec98158033e2cae10a1a3d30611d49575a9d7cfdaabd7743a71fd98. 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/SEBAA2203007.
Sinfonia in E-Flat Major SheA 131511: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefccf79640b98ce55ba0589eaaf49299a204737a3d76b00a7cdaa6d84bc84a13. 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/SEBAA2203008.
Sinfonia in E-Flat Major SheA 131511: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad174a478cabf312c33ce499de1d381b8bb37344bb8f6e54e737c22322de1aff. 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/SEBAA2203009.
Sinfonia in E-Flat Major SheA 131511: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c520770e6b2b2824269f8fbb0dc8b6f307cf86d2348d166fdc898c98913b11. 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/SEBAA2203010.
Sinfonia in C Major SheA 531531: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aaf071833a70b2621510f3acd7881f76f83a1625afbad43e6624184a83d66f. 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/SEBAA2203011.
Sinfonia in C Major SheA 531531: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe317887c373a794c605b5e7a4c2d9e297ea09ffe63e14ad3457c0341218c7a14. 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/SEBAA2203012.
Sinfonia in C Major SheA 531531: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6771205da0b9f0f11c04d751cedda8ec1e84e38078cec035cbae8e5ceefe91f4. 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/SEBAA2203013.
Sinfonia in D Major SheA 135175: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69266e2d28e4dbfd8379a89ac371b52e9e42733c2e5bbf219f2e290acd373d4b. 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/SEBAA2203014.
Sinfonia in D Major SheA 135175: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c3aa530476cb9b0d878e228a11ad27257e52f9b4ebd0d2094eb9fae512a574. 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/SEBAA2203015.
Sinfonia in D Major SheA 135175: III. Menuet & trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acebf58976d2d4aad63a7c9af5b2ff9093ce95e1068898f8aea0c4e5a2e9069. 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/SEBAA2203016.
Sinfonia in D Major SheA 135175: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b660874d10c10ad236ab49dcb7db97cb03e7d75b2a0e39b1654b3ea2111dca7. 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/SEBAA2203017.
Sinfonia in D Major SheA 135175: V. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1a21274e145946898563327c9c7c92fb6abcb6316220bdbd07bc05c392fd0c. 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/SEBAA2203018.
Sinfonia in D Major SheA 135175: VI. Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971078860217efffc4a2004099f09bd707adbb703d5b7d1d16983214522d051. 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/SEBAA2203019.
Sinfonia in D Major SheA 171111: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde20f4ea7d8c838fd97f67a6b23d1959f5045c6615165502ecdbef3ca2ca5c. 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/SEBAA2203020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b45379593a33e0feb67517c3dab426c7cbc1e3c97c801b448ada67eb48620c. 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/SEBAA2203021.
Sinfonia in D Major SheA 171111: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc86f7cd1e9f536c6a2d8478a5f0cdce86022d5159040fbd62c33941b4fd1ed7. 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/SEBAA2203022.
Sinfonia in D Major SheA 171111: IV. Menuet & trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04680ce07d17d4010572d3ed1d0d978302d6b5b00a22ace6b3541a6a1df9859f. 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/SEBAA2203023.