Pieter Hellendaal (1 April 1721 – 19 April 1799) was a Dutch composer, organist and violinist. At the age of 30, he migrated to England where he lived for the last 48 of his 78 years, and where he wa
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 0x8891ff34b434646564691b9f80d2f3d1a8d97be7f9e154190f6abd5c46b974f2. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bcea0f5-87ee-48b7-9827-70ecbdaa7d88.json and https://artists.proofprofile.net/proofs/artist/6bcea0f5-87ee-48b7-9827-70ecbdaa7d88.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
While Shepherds Watched: Christmas Music from Parish Churches (English Orpheus 40)
Concerto Grosso I in G Minor, Op. 3: I. Ouverture-Grave
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 0x866a4d69f8c328d1b74a64e440767c92eb10f1058b5ee2d60675ac2edfd1fce1. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100544 — a six-check JSON result.
Concerto Grosso I in G Minor, Op. 3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdf32ca2febe6ce01218b071b44215b699b8c75d45139626ff51833f0a69b50. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLY332100545 — a six-check JSON result.
Concerto Grosso I in G Minor, Op. 3: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f15d22c6e589701d23dba09ab49c598471477a493282a18061eb8d3a226b75. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/NLY332100546 — a six-check JSON result.
Concerto Grosso I in G Minor, Op. 3: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9eb293dd35380c34b024e1eadb3b7ac4d71ec40dedca1878aa7922afe01078. 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/NLY332100547 — a six-check JSON result.
Concerto Grosso I in G Minor, Op. 3: V. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b00538902d8da1fcdbc23cea06727792db9f7f827886a5573e074f428297b1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100548 — a six-check JSON result.
Concerto Grosso II in D Minor, Op. 3: I. Ouverture-Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c9f2bfc8736443a148a3fee8ac4cfc9c7f29de572b27ccbeea3fb09e66170a. 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/NLY332100549 — a six-check JSON result.
Concerto Grosso II in D Minor, Op. 3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563892dc7d3cbeca59c7d9979f0e6f347210f69ee43dcaba767461e617f0fba0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/NLY332100550 — a six-check JSON result.
Concerto Grosso II in D Minor, Op. 3: III. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87a383a9e66139bba8af3b20295bbd77f89979f8b4475b6f805e1f2f73cd43e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/NLY332100551 — a six-check JSON result.
Concerto Grosso II in D Minor, Op. 3: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903a215b6637cd6de650cbc31c778d54a3f1fa43b75fd4644c9f1a4dc12466a3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100552 — a six-check JSON result.
Concerto Grosso II in D Minor, Op. 3: V. Borea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ad1605f883ebbb76fedc44f2f0b08ce6f4e2e8838223daf3ed26f16a7537e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100553 — a six-check JSON result.
Concerto Grosso III in F Major, Op. 3: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d9a9c93abae2ee8dc36019cb9863f75b371e472dbf7d5e06cd3fb87f86ba3. 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/NLY332100554 — a six-check JSON result.
Concerto Grosso III in F Major, Op. 3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fc9304be78982f2bfd406d19cde56a71656a9636947d8473a420e4a345b4cc. 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/NLY332100555 — a six-check JSON result.
Concerto Grosso III in F Major, Op. 3: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786d63a0f55f4808a63f5bef93690527487e3015015a99c332e8ec2658164bd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLY332100556 — a six-check JSON result.
Concerto Grosso III in F Major, Op. 3: IV. Alla Breve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bf565775f69ac4b9a2849e66e135e0a1769b4a482ae46c655408737f4d151e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100557 — a six-check JSON result.
Concerto Grosso III in F Major, Op. 3: V. March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d971fac1e0afc2b2395e7f1e281a5ac84ea41501c3a01cd24f79c9877b784b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLY332100558 — a six-check JSON result.
Concerto Grosso IV in E-Flat Major, Op. 3: II. Alle Breve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92b14af14729b9a6611506d9a457950698b9854a132b462614bafde8817d105. 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/NLY332100560 — a six-check JSON result.
Concerto Grosso IV in E-Flat Major, Op. 3: III. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17c0efb09e3183f5fa7f8794c9d93f622f2b80ccee21cac2716f01a603d8a01. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100561 — a six-check JSON result.