Anthony Cattell Trischka (born January 16, 1949) is an American five-string banjo player. Sandra Brennan wrote of him in 2020: "One of the most influential modern banjoists, both in several forms of b
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 0x5bb9ab587fe19ca8435b7e883a98c7ae27b98a44a00bcd6bc3742c2939e5a1cc. 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/19fd7da0-0f07-4674-bf25-c9824780ab4c.json and https://artists.proofprofile.net/proofs/artist/19fd7da0-0f07-4674-bf25-c9824780ab4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Glory Shone Around: A Christmas Collection
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 0x0bd00f815242f96cdec86bd67f11a8b396fc1a16a773a5cb711cc1a38530c48a. 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/QZR8K2360009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c95875e6ce56c32a3dd9fee76f821265fddc390f95d1293a785da9efd342ba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZR8K2360013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50efd8c414ec52e753c07ee3ca359706302ad203f9ef3fcf1c57237103056eb. 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/QZR8K2360001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca6ad1ea9ce3d58505aecc4d9bb8c92656b80978094640514686485a9cec778. 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/QZR8K2360003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268db1a9b6c795accd8f10c382ad05ced5814bb5210db8dc00472948700c1404. 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/QZR8K2360004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c2e43d56f9c46c4c04a161476745a73e2df7705f1a9ea55a4c56152592c4f2. 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/QZR8K2360005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89fa5d065dc6e0da153c8fc9a5f5063849225c490e1db0ddc6636745cfac13c. 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/QZR8K2360006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe242f6c9f9eba664ebacb7f0db2781639a9eefc4477c1d0556e0bbb38b2dcba1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZR8K2360008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd00f815242f96cdec86bd67f11a8b396fc1a16a773a5cb711cc1a38530c48a. 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/QZR8K2360009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f65122c3b13002de0749b5a9b276b789b34089c8f931fe41a54dd0fc55a6b0. 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/QZR8K2360011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e33dcf64a62fff28e79408d075c7d3bf2a0134f341850fb215e002f0e37cd7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZR8K2360012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c95875e6ce56c32a3dd9fee76f821265fddc390f95d1293a785da9efd342ba. 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/QZR8K2360013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0d03d60b9dee42c7a0a20d395cc26ab771198debe4cac64a98dd5ce8168b4. 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/QZR8K2360015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fe42ddb268e94ef9141c0685dc3337e9f7949c9b6193a20ce860092392100b. 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/QZR8K2360016.
Woody Guthrie: At 100! (Live At The Kennedy Center)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224e71b75c09f36250b80901a3c9f5255a3d81b49e37ba0d10768e0330525986. 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/USQX91301083.
Foster Favourites Medley (Ring, Ring The Banjo - Oh! Susanna - Camptown Races)
Ashokan Farewell . Beautiful Dreamer (Songs Of Stephen Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacecd42ac30197e5ed9b500ca6c4d7081f4b3609e04e8f3cdb7a58dc07dbd14. 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/USAR29201097.
Old Home Medley (Old Folks At Home - My Old Kentucky Home, Good Night)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf802439ff5a6824513f020c16e2f062e911177ab8d0ee9be816335cce3c7b. 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/USAR29201101.