thumb|Aarhus By-orkester, c. 1945 The Aarhus Symfoniorkester (Aarhus Symphony Orchestra) is the principal orchestra for the Danish city of Aarhus. Description Established in 1935 as Aarhus By-Orkeste
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 0x02671f99b402dd82555f7c31b118119afe4781e7183e712282aa27df5308229e. 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/a4b26266-269c-4537-b4d1-a947ab1f71cb.json and https://artists.proofprofile.net/proofs/artist/a4b26266-269c-4537-b4d1-a947ab1f71cb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Symphony in C Major, GB 115: I. Allegro vivo
Bizet: Symphony in C Major - Carmen Suite No. 1 - L'Arlésienne Suites Nos. 1 & 2
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 0xa8ba16a9b1d685da646b5331bb981377109bf3cdc6324ec4ac58eba53710fd3b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607401 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3bcfa9e506a81abedb15ad3d5c69fda2fd54fdef1d2d1df581d56e5da2904a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607402 — a six-check JSON result.
Symphony in C Major, GB 115: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cd2275af5447415aee377fbd5e34e69107989793d6edc46ae56e97eb24dce9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607403 — a six-check JSON result.
Symphony in C Major, GB 115: IV. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dacddc66bcae9ccfbf7b92c09ccc2e32c989fe20f880e2908be41f187f0cc3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f17bae79e070066302816ae68d57cc01937678715ccbcc22111f4b1055f8024. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607405 — a six-check JSON result.
Carmen Suite No. 1: II. Aragonaise, Interlude (Entr'acte) before Act IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea23d8e869b78d69f852c945ce6b3a4ea33860df63f7c90906b508e13dbdddc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607406 — a six-check JSON result.
Carmen Suite No. 1: III. Intermezzo, Interlude before Act III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8e64594b59f5e36d38ae6430d43e4aad5846655b721cd6712aa8a19f901c2b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607407 — a six-check JSON result.
Carmen Suite No. 1: IV. Les Dragons d'Alcala, Interlude before Act II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473f61806e4f14efe9ac36841e3d2cf999066ecf16085dfb64a9989d8b2e4223. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607408 — a six-check JSON result.
Carmen Suite No. 1: V. Les Toreadors, Theme from Prelude to Act I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f7d119bba4558ec5231e9f16669210fb9154b445b6d86f685f3806889deef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607409 — a six-check JSON result.
L’Arlésienne Suite No. 1, GB 121: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1c94978e5528dbca035984eb65269a03f80287443a73cc3b6e906235ee003f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607410 — a six-check JSON result.
L’Arlésienne Suite No. 1, GB 121: II. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b2e370094824c626089116e4d197ec0dd69d71967fba02435a4b3dfd09426f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA1607411 — a six-check JSON result.