Mary Harriet Edwina Spender (born 2 July 1990) is a British singer-songwriter, guitarist, and YouTube personality. Biography Spender was born at the British Military Hospital in Rinteln, Germany, the
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 0xbb641f181d62523466e41a6888c1f130e01629939ebeb4155e82a7df551fde28. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6072071d-2f0e-4a95-90a5-96be1b6c3045.json and https://artists.proofprofile.net/proofs/artist/6072071d-2f0e-4a95-90a5-96be1b6c3045.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa234b4f269bd3ab7e8a9cda7f6f11634d2b42ebddbce9e15ed40fa400932aa99. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKPL1817748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9bf571cf3bca65f9aa52c9e43319444f660fbd48fbbba8092790d9c55eb4b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ31960745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1144f36f081b263d611cb7ee357ef0de663b46af6f6a58d31dce062ea4f5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB1982108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ac819d52fc6dc21bb7475a49c23d76c00a33435accfdf3bf0d666d2367a839. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2338999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ae84d441ba0f1d9158beaefe7768fa7c8dc9b437e99f7b9fdc49a60a4fb4c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWY2340893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49eb08d5ac50f07da44bcf4fa28b7062ee0512c557fb1784360bd6812774584. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWY2340904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d80fa8c9a36995d29e56d66781c5f193dcdb98a4fc46f0b193b3aa34fe62dd. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWY2340907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb70250980dbd218ea188aa3a135ead6a2567e4cd17f3c4e19b1da67c4ee1d20. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWY2340914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc94a0c51700d60bf990d0dc6d542b43dae03075fb6f2a18b17b6b40f675ba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:02:31Z), 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/QZNWY2340920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79daf91e54b164414728cd9d4cdb0e8051af4c727d4b4befe7c4cdb9bded8191. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZNWY2340922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a85c09a30403f48d66d346b75fe67d43137a0b837368797487f9386a4355f80. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWY2344571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2869237c6c94691b6efa121683ac07f9a65754d9aa57641efafb89c695d75d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:14Z), 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/QZNWY2344578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5924fbe833097186c4470fdb1338a8d6ed4b7eef3865eab8e8f26e402fa55d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2349766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7095ecc1c0b01a8665560273ca350d0f4a39dcdce89664d5d33f1525e8ec0029. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWY2352727.
Passing By (From Fretless - The Wrath of Riffson)
Passing By - From Fretless - The Wrath of Riffson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340bbe663ad737a4ff6459baa3be0c066585b93265e68c633c206aa369e7fc9a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR9W12513909.