The Boston Camerata is an early music ensemble based in Boston, Massachusetts. It was founded in 1954 by Narcissa Williamson, at the Museum of Fine Arts, Boston, as an adjunct to that museum's musical
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 0xa275fcb8934cb748fc428d9a55bd89abd3be148bb507f3baadbc19729fe6cb3d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d342b471-62be-4a1c-8af5-83764545f992.json and https://artists.proofprofile.net/proofs/artist/d342b471-62be-4a1c-8af5-83764545f992.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'homme armé. Musique de guerre et de paix, 1450-1650
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 0x724e00e396bcbb28f709fd018f2b52ed54965d38897a5ed1ea919528105f3a5f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208402301.
Morton: Il sera pour vous conbatu / L'homme armé (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb60efd933f43e6892b890f82f9368b22ef2589437bf9f5ecacc6e3c398fc44b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208402302.
Encina: Una sañosa porfía (No. 327 from Cancionero de Palacio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460566f61580a3856debb4cc662b5d5c99c33429e8f355c6c7045ea596b8d6a0. 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/FRZ208402303.
Monteverdi: Ottavo libro de madrigali "Guerrieri et amorosi": No. 1, Altri canti d'amor, SV 146
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc37a9d93de0999cf3aa6752d46c47de1de4e60c0f14afeeac90e3b1292dc6c. 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/FRZ208402304.
Gabrieli, A: Concerti, Libro II: No. 66, Bataglia. "Sento, sent'un rumor"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2bb8f790118784768e80f07939a36c6c8b8f6d1ca0f70aff42ae77359ba14. 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/FRZ208402305.
Byrd: The Battaile: XII. The Buriing of the dead (No. 39 from Elizabeth Rogers' Virginal Book)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d3acfa4c377c397a86b29e9090f9dd296d49742cbad26cb78dfcb5c911b96. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208402307.
Mudarra: Libros de música en cifra, Libro III: Romanza II. "Triste estava el Rey David"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e053937f47d17dba00bb02b5a1bc36fb15b5c6e5c02345e80748fe0c2660c5d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRZ208402308.
Schütz: Symphoniae sacrae I, Op. 6: No. 13, Fili mi, Absalon, SWV 269
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af880891c8dd51538efab906e2040865272f59c1789214fdc4b16293d522178. 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/FRZ208402309.
Luzzaschi: Il secondo libro de madrigali: No. 18, Quivi sospiri pianti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c4db777f209c71c4726188ec4e06674334cd071edaff2ec1797f68cb8b5de. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208402310.
Lasso: Magnum opus musicum: No. 414, In hora ultima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468463aad17e7518139044ff8bee155e25282f265c0097b9e00a68de2338ca70. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZ208402311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38801b15ace3d8bbbc7ef3d26b4d1a4a2829b1119d3d3280ac15b8254e5f5f6c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208402312.
Goudimel: 150 Pseaumes de David: No. 13, O combien est plaisant (1568 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ecfaaf99463249b68350c0e7027534845d4f9566bce1ff77a6635c61c253f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRZ208402313.
Rossi: Hashirim asher leSholomo: No. 16, Kaddish a 5. "Yitgadal veyitkadash"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf764eb6ebbd753789b733d3ac1bb0961cb2d5e9da7222c2f972e750c550e5d6. 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/FRZ208402314.
Byrd: Psalmes, Songs, and Sonnets: No. 30, Turn our Captivity, O Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224871df3ce6346f1b400bf5cefe46277b2e073ead1ff71a2464f063926445eb. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208402315.
I. Rejoice, Rejoice: Nowell: Dieus vous garde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9cef5b90e692b1ca78ec153e8fdbc0f8001aae002b273b3be2b8036eb5780b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO18613401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6fce24e697fd8be49c52dd0696751b274cec73dc75caca66d5c9986ca9bd1c. 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/USNO18613402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b6e4b106f49e271658be2770c08d44d156702f85b20fdaf73999d0f32d4cc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USNO18613405.
II. Behold the Handmaiden: Two Fantasies on "Une jeune fillette"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2b38f0bfd504205333ef27426a490648a61bec323212be88a08482f82b627. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USNO18613406.
III. Joseph Is Well Married: Une jeune fillette / Joseph est bien marie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf976d9441bc9afe2457c11f0f5d34e9c237ab05529d7e83d0f7539ffefa65ae7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USNO18613407.
III. Joseph Is Well Married: Joseph, lieber Joseph mein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50940823b5173983463e549af12f7494635a2fe76257272858736274974668ff. 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/USNO18613408.
III. Joseph Is Well Married: Magnificat quinti toni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3d2d5ce4740efdb18021ea48aa2bede77cd55dbdab3e83ec49c0d3f191f07. 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/USNO18613409.
IV. The Birth of Jesus: Es ist ein Ros' entsprungen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f249692239fdc0e866a52ed513b97de69e3dbe2fa560dbba20187cea1679b5a. 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/USNO18613412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1119cc4460be1386a46981c856a967b7a90e419a51615259c8eaa079802c96. 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/USNO18613413.
VI. The Shepherds at the Cradle: Ungaresca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a08aed75d9a55108e33be6492b56ab35d6f40223f73e5e8aaf286b530e27ab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO18613418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eab780f8462ec263a4784944bc477ccc885f45468bab553bb2381f78e8f869c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USNO18613423.