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 0x0e0c140f2e79179b637a6f22c38da763a482c81327764bdb1331282888bbb572. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41818175-e8a9-4d07-8b4a-8ed0d9ddd3c8.json and https://artists.proofprofile.net/proofs/artist/41818175-e8a9-4d07-8b4a-8ed0d9ddd3c8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lost Is My Quiet: English Music in Purcell's Time
The Fairy Queen, Z. 629, Act II: One Charming Night
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 0xb312d3514d2bdd7883816f66cb9e0333e3c16e573997df632c384b7ba579e08a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAJ720330001 — a six-check JSON result.
Pausanias, the Betrayer of His Country, Z. 585: My Dearest, My Fairest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e477e690c80eac7730d3f015531ea327daa2f34622cab5ffbf352a38abf5ca. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAJ720330003 — a six-check JSON result.
Come, Ye Sons of Art Away, Z. 323: Strike the Viol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e68470bb524ab53953224a299ac4845e59085cba57b400a35bdce76ad41c9f1. 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/CAJ720330013 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50260d6ad4b0171bbfce6aedb03709dea776dd8ce1327afebf98f822994297c. 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/CAJ720330014 — a six-check JSON result.
Ode for St. Cecilia: See the Forsaken Fair With Streaming Eyes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61ab481b27494d6b8c2482e90ea6cca09c44c8801f01a0ae2b0dca3eae0a516. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CAJ720330015 — a six-check JSON result.
Welcome to All the Pleasures, Z. 339: Here the Deities Approve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc235bee0367b5d4dbbe2fa39e17f42036d3f0e9b16eeab8dd88d57ade490c86e. 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/CAJ720330025 — a six-check JSON result.
The Prophetess, or the History of Dioclesian, Z. 627: Since from My Dear Astrea's Sight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfe15c951ea36449c71cf7a9dacd5e98cba255065adce5542981c12ff73173d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720330027 — a six-check JSON result.
Trio in E-Flat Major for Viola d’amore, Bass Chalumeau & Continuo: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46716a3919adc3a2264a5d20b42b7971c4d86babcc5dca4edb90d77dbab4137. 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/CALC41000085 — a six-check JSON result.
Trio in E-Flat Major for Viola d’amore, Bass Chalumeau & Continuo: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb00ceff81b08fb111117019da43fa58c6fb5db49c9e0b199971eb2124542e2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CALC41000088 — a six-check JSON result.
Classical Expressions: Best of the Baroque Period
Concerto en fa majeur pour violon, 2 hautbois, basson, 2 cors, cordes et basse continue, RV 569: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c307bb236b947eda3dabebb8d01f06f95e1d9b3f02ef4b3404e0619e818bd16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAJ721660201 — a six-check JSON result.
Concerto en fa majeur pour violon, 2 hautbois, basson, 2 cors, cordes et basse continue, RV 569: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b1bd594ae46ae5bf360cbb4fa5316cd662e52ddd2faf9a0737415e73162c1. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/CAJ721660202 — a six-check JSON result.
Concerto en fa majeur pour violon, 2 hautbois, basson, 2 cors, cordes et basse continue, RV 569: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c6cba7e768b57b1ac192ca054393612e5c89b80b58615f697062604ca309a4. 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/CAJ721660203 — a six-check JSON result.
Concerto en si mineur pour 4 violons, violoncelle, cordes et basse continue, Op. 3 No. 10, RV 580: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c0f6c788f7f28d5b7fa59d50c6b30e793d3b4d56b1ff99c279059f1281999. 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/CAJ721660204 — a six-check JSON result.
Concerto en si mineur pour 4 violons, violoncelle, cordes et basse continue, Op. 3 No. 10, RV 580: II. Largo – Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f0dd08410458366377cff6d2202c6c77c12f1a06fe815937fae37793fbf5c6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CAJ721660205 — a six-check JSON result.
Concerto en si mineur pour 4 violons, violoncelle, cordes et basse continue, Op. 3 No. 10, RV 580: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612b3e4f639bd5e5b2ef333788c9f11a898851fc907e3b13caa66fd79c8c1b01. 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/CAJ721660206 — a six-check JSON result.
Concerto en sol mineur pour violon, 2 flûtes à bec, 2 hautbois, basson, cordes et basse continue, RV 577 “Per l’orchestra di Dresda”: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c91f495d1563161b7db3b14e395821b05e3b00c96b196dbcfdae7932bc75b69. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAJ721660207 — a six-check JSON result.
Concerto en sol mineur pour violon, 2 flûtes à bec, 2 hautbois, basson, cordes et basse continue, RV 577 “Per l’orchestra di Dresda”: II. Largo non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0c169f761e56d1eaa1441948ab26c7db1334d591f78241208cd4cac88be21e. 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/CAJ721660208 — a six-check JSON result.
Concerto en sol mineur pour violon, 2 flûtes à bec, 2 hautbois, basson, cordes et basse continue, RV 577 “Per l’orchestra di Dresda”: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee94e709e1b4799f4c6e63f8f872344f1211b6938eea68f6d24504ea980b1c3c. 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/CAJ721660209 — a six-check JSON result.
Concerto en mi mineur pour 4 violons, cordes et basse continue, Op. 3 No. 4, RV 550: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe172bad2d28c6ef049aaaea836225675852bfde299e85fa3e709980dc6b059cb. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CAJ721660210 — a six-check JSON result.
Concerto en mi mineur pour 4 violons, cordes et basse continue, Op. 3 No. 4, RV 550: II. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d816e5bd0c0b75c82dc23373703cc4ee7f050f2f0501aec42e8a954a3ac40. 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/CAJ721660211 — a six-check JSON result.
Concerto en mi mineur pour 4 violons, cordes et basse continue, Op. 3 No. 4, RV 550: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e400624bb50ad260f338f77b1b4fe2ce45a1e680bca7886fa869b8cd7b1b43e. 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/CAJ721660212 — a six-check JSON result.
Concerto en mi mineur pour 4 violons, cordes et basse continue, Op. 3 No. 4, RV 550: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20217d7d70d34eff77a6db83e2a78bb2416a8ad3d7896e7b32e96aad6ccc09e2. 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/CAJ721660213 — a six-check JSON result.
Concerto en fa majeur pour violon, 2 hautbois, basson, 2 cors, cordes et basse continue, RV 574: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf07ec93741d7071225e22cb5df173839b62d6f90a60896d5e6d88a11692bf6. 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/CAJ721660214 — a six-check JSON result.
Concerto en fa majeur pour violon, 2 hautbois, basson, 2 cors, cordes et basse continue, RV 574: II. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3665eabbd5be0c4cd26d8d51a89520c801fd13136c32c279b2250419f77cdcc. 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/CAJ721660215 — a six-check JSON result.
Concerto en fa majeur pour violon, 2 hautbois, basson, 2 cors, cordes et basse continue, RV 574: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03debca53cccde1d5ad6394ec8afbe23b62408e5387bbb6093a7f4cab89d8a1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CAJ721660216 — a six-check JSON result.
Sinfonia de l’opéra La verità in cimento, RV 739: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbd48bc6599ec055920c91297ef0e4f1056e07d43eda85d35661c6f8ef7cbb1. 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/CAJ721660217 — a six-check JSON result.
Sinfonia de l’opéra La verità in cimento, RV 739: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47157322dbbb9a6c81599f441a75bff93e44c095a3d6ad9812cceff7806853ec. 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/CAJ721660218 — a six-check JSON result.
Sinfonia de l’opéra La verità in cimento, RV 739: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a0490ad978058f3322dc8c711c52f60fb0e36679610aeeaaf88878516bc7e9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CAJ721660219 — a six-check JSON result.
Concerto en do majeur pour 2 trompettes, cordes et basse continue, RV 537: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb485522c61aec30d554092b063c0731b71f89648c001569d9b80294ad8bfdecb. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ721660220 — a six-check JSON result.
Concerto en do majeur pour 2 trompettes, cordes et basse continue, RV 537: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe683bb7a2fa5d2dc22a64cb7f7f658c5308c4951a6a8daa7c89c3aae2baaa8d0. 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/CAJ721660221 — a six-check JSON result.
Concerto en do majeur pour 2 trompettes, cordes et basse continue, RV 537: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9757ad2fe9e184ce6e4f7a34d40cfcba68e2972522d49763620c5c7afcd41716. 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/CAJ721660222 — a six-check JSON result.
Telemann: Sonatas and Duets for Recorder and Flute / Maute: 5 Fantasies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8f0f6d622d72ed0a4c44414a46706808fb0385b288531590617f044e0084cb. 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/USA560690682 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f2cab395a14835f9230f434d4dbc479e4afbf08cc060f06e3ed19ae83957a7. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USA560690705 — a six-check JSON result.
Sammartini, G. / Maute: Sonate e Concerti per flauti