Tasmin Nicole Stephens (born 2003), also known as TTSSFU, is an English singer-songwriter and guitarist based in Manchester. She played guitar in the post punk band Duvet and has since gained prominen
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 0x72ff3d3bd4db330107acec20f33d59f19b1b5f2d65aa0dbef2a0890f50e3898f. 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/50bf89ec-5a06-432a-90da-4974102ccd26.json and https://artists.proofprofile.net/proofs/artist/50bf89ec-5a06-432a-90da-4974102ccd26.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 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 0x09aa84d9314243bf6421f25425c32bf26b439089e4c3b491ec363e7813c110d3. 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/QZTAW2237384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0140859e8b57090650eec75bdfe511677117f778c3aaa956e71f137e94670c. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZTB82283195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5012bd58deec0e30a5fe10c0b94d9b0ec4d7637515c43beb75211528af7fea. 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/QZES52395433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6eb47257e10438bc25d0ab0cd40af215f2edc8786be2a7dc20bc9a775a128. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKEMS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6eb47257e10438bc25d0ab0cd40af215f2edc8786be2a7dc20bc9a775a128. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/UKEMS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6eb47257e10438bc25d0ab0cd40af215f2edc8786be2a7dc20bc9a775a128. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKEMS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25b63b91e33cebb2d5f766b94f2667d08b485342dc48d03d9ae87c35cb558f5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/UKEMS2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab553f89e5db5f3d57752289bec1181c337056dcd3b8f4ec68fab88924c7c923. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKEMS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4ea1d6b8da0d686cf06b1274e3f31801f46efad673aea118f19e6b6cb849bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKEMS2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2f426cca562824bb0398f6bf64a3f97c64a3086dc5aa52c3a969d2d2233a5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USBQU2500102.