Barbara York née Spence (23 February 1949 – 6 November 2020) was a Canadian-American composer and pianist. She is noted for her many contributions to chamber and solo repertoire for low brass instrume
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 0x325b549f478bf9b9a764c4a3979a0d84634ff61f991debf8ed1842ba384bbce7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cc2c367-edb0-47df-bce5-75dce587daf3.json and https://artists.proofprofile.net/proofs/artist/7cc2c367-edb0-47df-bce5-75dce587daf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Euphonium Sonata "Child's Play": I. Quarter-Note Equals 132
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 0xb74262b77687c20a0643cf2a5eac6dcac4a3c64db8b0ebf3beeecf20680fa475. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USPMZ2113901.
Euphonium Sonata "Child's Play": II. Dolce. Espressivo e rubato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60607720080e1c889a8868fde583a0a9ebe1f824cf8b2624ae0891c16dc83f0d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USPMZ2113902.
Euphonium Sonata "Child's Play": III. Quarter-Note Equals 132
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388c4649ecdc9c293f6625c0571f094102856914887750983790ad03f67d0f1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USPMZ2113903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96e7ee7e540a2c374ea2988079d3d7db6da86a760f6d6dd6aa2821ddbb0edd. 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/QMB751400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012cec46a4f18be7ef47fc6ca556ac01b3141a1626049d38a55e1983e8a828e5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMB751400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38bdcdfce04b2e85b4c87acd0d29c8563b4a9f3fc99787f17e3920f83db847. 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/QMB751400003.
Raw Emotions: North American Tuba Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1150bb7a4bad43638014389cdeb803d335fbd6e68e9d05cd3464f970c1f948c. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAB10911140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57168f0ed4bf84dbc12a34c25105926220ae0984b4590f388bb7f52ec5c64760. 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/USAB10911141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5f9cf19f3690c58ff9c530e72f6c5657fbf68852417d51c208bbc42963f390. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USAB10911142.