Herbert Mayr (27 April 1943 – 6 September 2015) was an Italian politician from the autonomous German province of South Tyrol in Italy. Mayr studied sport in Bologna during the mid-1960s, at the end o
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 0xce51e457ae0b8dfe383e54ef698805c97e190a86589df6dca687a6e2c3d6498e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20f2f48e-6756-4607-8299-cab09d4aa129.json and https://artists.proofprofile.net/proofs/artist/20f2f48e-6756-4607-8299-cab09d4aa129.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Serenade for Wind in D Minor, Op. 44: I. Moderato, quasi marcia
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 0x4b243979a11c51fef8440d712295f935c5f1227264edb4df321b1da3a835ed51. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960100246 — a six-check JSON result.
Serenade for Wind in D Minor, Op. 44: II. Minuetto (Tempo di minuetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeea3ea4a620b7e89bd46608ecf55032f58f49d8010a2b94da597b59a528366f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960100247 — a six-check JSON result.
Serenade for Wind in D Minor, Op. 44: III. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e27ec5ec0baa8d3eed9045b66d74743e8a3728ff62b7b4c2f1b4ed4533d5bc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960100248 — a six-check JSON result.
Serenade for Wind in D Minor, Op. 44: IV. Finale (Allegro molto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e067e0d648558031b80beeda2581825b64cb0778635629ba48f7322f5d8743. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960100249 — a six-check JSON result.
Abendlied - Arr. by Dominik Wagner for Double Bass Sextet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f5250b42eea19714e2f031024f895bd5da07f35e0276c1f1700e1f9e9114e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DES382335001 — a six-check JSON result.
Locus Iste - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daffe86bab69fb403d0d25f74a31837c4e18812e412a9bd6856129a0831bbfa. 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/DES382335002 — a six-check JSON result.
Christus Factus Est - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0c844afe5269b49517984aef5db0ab55a07fb5628b00c40192856e955087d9. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DES382335003 — a six-check JSON result.
Symphony No. 9, Op. 95, 2nd movement: Largo - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288d9e5f0f7cc3ebba9c081c34a86b53a020c20228d556e2b5000cd21f2c230. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DES382335018 — a six-check JSON result.
Symphony No. 9, Op. 95, 2nd movement: Un Poco Piu Mosso - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b9af3f9d3bcd3253bd2fba2f8a7bcfb2c6515c26b9f6f9613a29debff6864. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335019 — a six-check JSON result.
Adagio for Strings - Arr. By Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8f8e61afe7351d07857951919f28fc046ba29d71a680dd3ee043e6a700f70. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335005 — a six-check JSON result.
Bohemian Rhapsody - Double Bass Version Arr. By Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7988369012fa1b50dae4781893a0f714d68e49f927f0008a9ce8c225878298fc. 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/DES382335013 — a six-check JSON result.
The Final Countdown - Double Bass Version Arr. By Johan Strindberg for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b8246ff1bb103ca14569f5a2a2dfc2f61a9fbcaea94ada21e53a5fd3056e64. 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/DES382335014 — a six-check JSON result.