Peter Ostroushko (August 12, 1953 – February 24, 2021) was an American violinist and mandolinist. He performed regularly on the radio program A Prairie Home Companion and with a variety of bands and o
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 0xabe8b95c0a3def33955f14f2e3dcf6b54b59e904f028249cc3f97310648f8f5e. 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/f824cd4c-ccb6-4aea-b5e0-106eabcd7fe7.json and https://artists.proofprofile.net/proofs/artist/f824cd4c-ccb6-4aea-b5e0-106eabcd7fe7.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 0xea4f7911cc2099822756f10280f0ace79558508b994f198bbdfb8ec71979595f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:07Z), 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/USRHR8903012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2690a5fea6b10a65ea319b2507527f1f7f33b05ead4b658063fec8dc4909c0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:09Z), 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/USRHR9507002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0c2ad41b4cdebaca3b13c57b45725d45f5aef6bafe4c8e50d46ca20aea085c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:59Z), 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/USRHR9507004.
Dakota Themes: Kasposia, Pioneer Waltz, Pigs Eye Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a37c8a5a7bee9cbe25cdd20045f665a10c7c0af0825a882a2efcec4eb85abd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:48Z), 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/USRHR9507005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4909a916e42459375fdd835064b153cb5aa74b0429d4ef7b31fa3c1e6598d0e3. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USRHR9507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96886d44b028a95eac7b7179f238fae5a8ad44203980bab80cc28c7a9245305a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USRHR0014009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141e9f5f7c2fa39acba583a3bf001f9242bea9450876b7a447ba6fa0ceaf1a9. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:33Z), 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/USRHR0317001.
Heartland Holiday Live at the Fitzgerald
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4046561ffc3d080750001d49ecb74586d9fc5e93ae111bf46321c43b296f4680. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:20Z), 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/USRHR0518504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038f2cc7b73657942acf444c983badb147ac4a6933d4dae82c231be339cfc8a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USRHR0518506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf5a5ede5e18afc6c4b812c8e215dc255b46592c4c22678262e8f7500db1934. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USRHR0518511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea5bbeb4df711ebd019dd743be0d8965123d6522d3accba9dbe1827d07d0444. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USRHR0518512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fffad7cc3b2c231f8a4881382d302cccf8c24cc41dffef0434bf6392c92431. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USRHR0518515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221d2decd9eac34e42a988df88e15c6bcfc25932f4f3e57960ea104d7f95f23. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USRHR0518519.