Marion Studholme (27 June 1927 – 6 January 2016) was an English soprano, best known for her performances with Sadler's Wells Opera Company, and as a regular performer on the popular BBC radio programm
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 0x75357e07acb9e9c262ee67b1e6a29c32983f78aeda26bba3535e0505fb61cd61. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7aedf61-8476-4f51-8e57-c7f20086c85f.json and https://artists.proofprofile.net/proofs/artist/b7aedf61-8476-4f51-8e57-c7f20086c85f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peter Grimes, Op. 33 / Act 1: "Oh, Hang At Open Doors"
Chorus of the Royal Opera House, Covent Garden
Orchestra of the Royal Opera House, Covent Garden
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 0x11ef2b99c125e9ce6dfffb795c737c92900e1e7715a843d15aa850869ee5f06b. 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/GBF075840106.
Peter Grimes, Op. 33 / Act 1: "Past Time To Close!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8547439a58f5d28afddabfe9c5a18ebd87300f68a0b74bcc72a2c43926fee9. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBF075840114.
Peter Grimes, Op. 33 / Act 1: "Now the Great Bear and Pleiades"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbbe6da5faef76c8d1721d7ade9ea92a8b28c8e1029e10e227ea664439346ed. 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/GBF075840117.
Peter Grimes, Op. 33 / Act 1: "The Bridge Is Down, We Half Swam Over"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e8672f9d449e01510d7032bc25388c4d13844d4902248a96f6e82c550c0c92. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075840119.
Peter Grimes, Op. 33 / Act 2: "What Is It?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa594ffc0cb28bbfb47e09cc5b0e6f7453998c056b05469b5a48855eaf98cde59. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBF075840125.
Peter Grimes, Op. 33 / Act 2: "We Planned That Their Lives"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36229f828dcebc79473f2cb09ad3e24d4c79beabe3f37a0687fc6ca56aa6d2. 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/GBF075840127.
Peter Grimes, Op. 33 / Act 2: "Swallow! Shall We Go"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541cbac077170776f3badacdd4313b9c0e1e204fab0ee138d8e070bf7882ad51. 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/GBF075840128.
Peter Grimes, Op. 33 / Act 2: "From the Gutter"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43301c596226cfab0a02d6c24f77e7c6903a43a3e1333ccd3e61870c292c678a. 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/GBF075840130.
Peter Grimes, Op. 33 / Act 3: "Assign Your Prettiness To Me"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22a26f0a1c68623d86910aa9f2510ab9dc85508c242acf283a8b86aa28f5fe. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBF075840136.
Peter Grimes, Op. 33 / Act 3: "Who Holds Himself Apart"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a1c1535dc508f0f744c58617b70a996f009cb750b92cf664a7faf2ceb00fd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075840141.