Kathryn Marie Hahn (born July 23, 1973) is an American actress and comedian. She gained prominence appearing as a supporting actress in a number of comedy films, including How to Lose a Guy in 10 Days
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 0x71d637b46bca1f12c8657f2ad74d3b16a894b52b30d760354e8d11ad48238f7d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcdb368a-619a-4f9e-be14-c47ef64062f8.json and https://artists.proofprofile.net/proofs/artist/bcdb368a-619a-4f9e-be14-c47ef64062f8.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 0xb05bf12efc8510b7cbadae778e2b50999170cfddae8c6b1735ff6cdc819ff835. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEXO82102418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890879e57d7affcdf2a1bfd9e7c9ff7da0ca2e74dca0d4c5fdcd5631a953201e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:50:44Z), 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/DEXO82102419.
The Ballad of the Witches' Road (Sacred Chant Version)
Songs from Agatha All Along (Episodes 1 & 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ab6b018e0085bfbb6038773249ea05494fbf8276f8548e8dc7c3e5a6b2785. 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/USHR12448671.
The Ballad of the Witches' Road (Cover Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9475aa5e88935347ab43d4c115a9f090927e81c3aef5f90495e7a1f6849f588. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHR12448673.
Central Park Season One, The Soundtrack – Song-tral Park (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31991b99c26cad07d4667395d3d99be3458aea72334702dae46aa27d93bfda9d. 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/USHR12040106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe74ef313998a4d4dde4bb1c24e4a6fc566e415d2d0393e1fc9d384cbb0df7a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHR12040114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb86c46355d693b02ec2d34d82dc25953b8be9541ad608da6addce4e2cb8db2f. 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/USHR12040115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ef982d05b03d3ef21bcdcf774ba512771b86451b331d2296035afd48f8b26e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHR12040117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd54c179f05845f65a8365694b524a07c72a6544bb5c65a8aac6149d0f2c163. 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/USHR12040159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dac5ed99ecd4d0da7e86dc6c9e628756bd2518349f6ac469219603bb341ee5. 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/USHR12040162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c348e48a0251411d914e099b2596f323274b53ab37fcd425791ccc1673dc23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHR12040170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b46459a6ccf21d9eae0a957db703662574f718c30953f13100a65d24f44e74. 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/USHR12040172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb51ef1ad9c553d94e14924a7ab4692242dd14513bf5be54397f85b5cb2af43. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHR12040174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c51699d65b08cdeeba0b570bd61222905ec3ea73e0e40c70db418344171b96e. 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/USHR12040178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad391b744b489de0564361c5b739f46eb3cb665f999ccb958f3a6cc6accc24a9. 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/USHR12040183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e47c00b1431f184a98fe2d00c0adf66d7575733e44207c692842fe6cebdd55. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHR12040195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10de6d12c47f51b7f52b9912df876da9128a5891b8d0d2e5c111b5754cffa45. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHR12040187.
The Ballad of the Witches' Road (Sacred Chant Version) - From "Agatha All Along"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ab6b018e0085bfbb6038773249ea05494fbf8276f8548e8dc7c3e5a6b2785. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHR12448671.
Agatha All Along - From "WandaVision: Episode 7"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6113498f067042556968ee895a221c36689f2bcd157723d00f294c637906a1df. 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/USHR12141346.
Central Park Season Two, The Soundtrack – Songs in the Key of Park (Vol. 1) [Original Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40178f20b70323ceeb064a453c1f651d8cebaad088a95d54a974fe3998f2ae4a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHR12141745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1807e6d4c8856ba3ca571a85e31dc7dbb2278d5933e817da130cf201b3c29aaf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHR12141747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c92c9bc7c9f3cdda65fccfb6fc4272925b341a789c20dc41ebd5c5bd41a28. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:00Z), 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/USHR12040175.
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