Alice Harnoncourt (; 26 September 1930 – 20 July 2022) was an Austrian classical violinist. She was a pioneer in the movement of historically informed performance, founding with her husband Nikolaus H
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1565759969c3963c5fe9df8c902087dc9e969a336acbe963bc057a5a1551c99f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec3cf6a0-b581-417d-b51a-11c52f804e91.json and https://artists.proofprofile.net/proofs/artist/ec3cf6a0-b581-417d-b51a-11c52f804e91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": I. Allegro
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce27624482616d0d159876bab2f6886a593d1c1ac36f6c99fa93faf27aaa481. 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/DEA807700604.
Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f158b254bdb6988ecbb62f9a52ff9beec6f5a6e8d331a8a011e2394da91c393. 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/DEA807700605.
Vivaldi: The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": III. Allegro "La caccia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24e0cb437eff1806481378040f619854044a41dbe5580438be9a741bfdb3144. 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/DEA807700606.
Vivaldi: The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab2fb0b83b17e7f8780ad899aec01d0374280afda5e28f22b7ac5bb4edbcd54. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA807700602.
Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8c7516ee012656a282477b7da9e19822f395a1544a2064ba5c62727fd0bd65. 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/DEA807700403.
Bach, JS: Violin Concerto No. 1 in A Minor, BWV 1041: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d93909b9406afd8a210c4b637af58ba9d8b142ef29aa82a56aef7f79e65b1a1. 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/DEA806700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab2fb0b83b17e7f8780ad899aec01d0374280afda5e28f22b7ac5bb4edbcd54. 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/DEA807700602.
Vivaldi: The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74cea3c3770b550a6458430cd84ef01f98a16c45c7f7b9cce40d79785c1858. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA807700601.
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
Vivaldi: The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bdc3710d47bfdb28c2b95edd3b405ffa6982a9841f97f6299a15b3c2a92917. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEA807700603.
Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe55e713017cdcdd59e23c0ab267ab2d3de9082ccf27409aeac4554bbd19dd4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA807700301.
Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": II. Largo e pianissimo sempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa06bc786b7509f0b5f5ca6f942400b043f289642ae86a0930c780f27990cba8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEA807700302.
Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05485069c7d69edfa67e2a55fbcc6a2341309062be7739e1162988f231246ab. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEA807700303.
Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3072220804f3ab62d95385ce4731eebac9709f29ae6bb149730926dcba0c382d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEA807700401.
Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3395f07b981130a37a6e5d8a182b18dcb9f3aa597c606a7cdcc44293b56953. 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/DEA807700402.