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 0x77458986c1d38a07602d1325daeb37623172415e66ac438dd4f79a0f3cc42256. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4e8d84e-822c-4b96-9c8e-c92a4dfd147f.json and https://artists.proofprofile.net/proofs/artist/f4e8d84e-822c-4b96-9c8e-c92a4dfd147f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Simpson: The Seasons, The Monthes & other divisions of Time - I
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 0xa80ec3d608a62ccf28cf64f1d2241929381f44d8bab815e4ed39effa5f0c8dca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0408802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca73215ca1dc11d8ffdb0b4f21f13d6ce3a63990a97f898453d52398b9422a0. 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/FR50X0408811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570d1cb9173625c94abfd82a4f3c01f2f5c8a33261c0327a3465ff6cb4a76b86. 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/FR50X0408815.
Marais: La Rêveuse, & autres pièces de viole
Concert XLVIIIe siècle "Le Raporté": Chaconne raportée à deux violes esgales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c81c01c3a7c0c5d37407b1be953b34c103bcf8110389be3d5347cd24cac77. 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/FR50X0203601.
5e livre de viole: Prélude en harpègement: rondement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6794a42d84a4da95a4307da63537583e20b15393bd99cb5835aa1424749e313. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb61ac2f4d9d655a4b43ac2b4c09975c86ec608acb7777ff2b13a4e3a715680. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203603.
3e livre de viole: Grand Ballet (Extrait du IIIe Livre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cef64bee53191d81f62d2a8a03a7d3fc21613ab6b69f01d3fba6784982b03. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203604.
4e livre de viole: Caprice ou Sonate (Lent, très légèrement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f353a1f4c4ce7ac98067ca89e11c8ea659926f4576dba0fe421c5d91d9436c. 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/FR50X0203605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3c7d3a7a291b118b180d138d6d504101ea0b85a4fff894adfa60d62005de6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b50eaec1400ac520189a63de27b0043eee16a6fafd795dd98aec7aaef0e8a5. 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/FR50X0203607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2720a647b0884dcab416fdde04d90b229177cedb6d5109a0823d0eadd08273. 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/FR50X0203608.
5e livre de viole: Dialogue (Légèrement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214ce8c742ee74f5e5abb942d8bd295e3671a05ee153e70ac29bdc6b2209c9d3. 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/FR50X0203609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0711af3aa8863632460aee2ee9f0d8e63cbccb921c77e8cee92e8ae72c305f7d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf51f20ebe46ddd671a00a31a6c4cab1afc273c5776eec77a6b4811bcc2c5f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203611.
2e livre de viole: Tombeau pour Mr de Sainte-Colombe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a120dc946eafd3759fda7090c0b1bbd890cf55ca14b29652cbb935833d1d23c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR50X0203612.
Musiques de cour et d'opéra pour Louis XIV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b50eaec1400ac520189a63de27b0043eee16a6fafd795dd98aec7aaef0e8a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0203607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb382b944058002a2532daefca5d47872236023e6e93841a917f0df88319b7bda. 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/FRZ149644050.
Messiah, HWV 56, Part I: "But who may abide the day of His coming?" (alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d43f5a9d57867bd3643670cfe474220dd8d56b07038aaf05c9300a2402eb3. 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/FRZ149304060.
Cantate, RV 684 "Cessate, omai cessate": I. Cessate, omai cessate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c655ab762d63a9a4ff5c56c27a4606e5b96680a3485ee448a1d65ba62cd4cb4. 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/FRZ149510040.
Cantate, RV 684 "Cessate, omai cessate": II. Ah ch'infelice sempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff770668fa9184705831fe6341e72aaa8f8a8fde0a6deabbd7be781428089c9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149510050.
Cantate, RV 684 "Cessate, omai cessate": III. A voi dunque ricorro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783c9553a3075a9aab1282d7fdf102c2e055061f79d3122893d44548ffab1f54. 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/FRZ149510060.
Cantate, RV 684 "Cessate, omai cessate": IV. Nell'orrido albergo ricetto di pene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d1d3ac5369558176ed7c9fe4c1fae113530dc6e5e1bff02b3b7c889aaa4435. 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/FRZ149510070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd989e7228f9d8421fab131e9f9495ec41a8513e99611afe8bc8c78488970703a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ149706140.
Stabat Mater, RV 621: VII. Eja mater, fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaea96c70f301431dd48345232e187e6d8112de831440a1f2ff5c3bf885a1406. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:29:28Z), 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/FRZ149510190.
Stabat Mater, RV 621: VIII. Fac ut ardeat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6661ba4546573e122f4b942cb8be88bbdeb055e64d88ef2fec6da92939b25d4c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149510200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf71aef074213a4970592829fed360bcdae6dc63bc52f31df13929774e48a81a. 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/FRZ149510210.
Matthäus-Passion, BWV 244, Part II: No. 39, Aria "Erbarme dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806e5422b80cf4f28c4540197fed67ec4ddcc84a89bcd3114b48f1d531defa1a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ149810100.
Libro IV d'intavolatura di chitarrone: Capona (Arr. X. Díaz-Latorre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfdea94424dc6805b7a69e91907633aa9a490e9bb618348a96b60ca1028d2f3. 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/DECP92004004.
Klag-Lied "Muß der Tod denn auch entbinden" from "Fried- und freudenreiche Hinfahrt", BuxWV 76
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73598e502e89827445bf9c8d8daa7635596d7d1a3c9abf54631791384afd555e. 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/FRZ149765060.
Dreames & Imaginations - Poeticall Musicke to be sung to the Lyra viol (Music from around 1600)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4921a2651b33f3c9f6bed3de0dfd36935028fe953fb70f6771cbe2ee0497ab6c. 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/DEPU72116202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d5c3b6d9ae879d22c0c1de9303223147cd66a6a045361ae69ef2aa10f36d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPU72116209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437084599262ee7ad12ec537ce7f3fe425b626bf71f2ef2285dde2c3651a83df. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPU72116213.
Chamber Music - Ford, T. / Jenkins, J. / Danyel, J. / Ferrabosco Ii, A. / Holborne, A. / Allison, R. / Lawes, W.