Leighton Marissa Meester ( ; born April 9, 1986) is an American actress, singer, and model. She is known for her starring role as Blair Waldorf on the CW television series Gossip Girl (2007–2012). She
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 0x7880678b3e581e2d6d202e4751db440e0a391d13ab2e9a2b49dafdfb4ea64364. 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/11e05ba4-70b4-4016-a111-f3631dcaa03a.json and https://artists.proofprofile.net/proofs/artist/11e05ba4-70b4-4016-a111-f3631dcaa03a.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 0x3d0a93a1e87adb8b0f946493afa6e9c6b6f565ef80ea34d7e71941c5947aa7f5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q2509339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292214ae8b148b34972b31b97db3b30fba14b05f557053acde9e7794a0b7ed9b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM71018379.
Country Strong (More Music from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d3ce35c3f049ca90d96728828317f04277a851b0c4743878b32b88e7d3a028. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USKVH1000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330f2a9755094168a03c689af3bd1403e067e166012154941bea77cf9a10e43b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USKVH1000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1939482720f69b9e167165b20ddfa80a0de4f6aeffbed49a52824cd8ffed6c89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USKVH1000072.
Ultimate R&B Love 2010 (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0bdd6937358581ada989212f70013afb1dc87f76876b8bc1c0834cad460261. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM70902524.