Punch Brothers is an American band consisting of Chris Thile (mandolin), Brittany Haas (fiddle/violin), Noam Pikelny (banjo), Chris Eldridge (guitar), and Paul Kowert (bass). Their style has been desc
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 0x1a8292f9f49da9d5109808cfb0b20eb0b601c354d82dfd7b24d548478eb2d1cf. 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/fb3c4487-b83f-428b-a1d6-758bb66887fe.json and https://artists.proofprofile.net/proofs/artist/fb3c4487-b83f-428b-a1d6-758bb66887fe.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 0x58b7b50cdb6d6d35b8cbb14fca8bb8a2f120689efe82e812fff6f85e6cb485bd. 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/USNO11000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d04c03f30a90b8d6c84b0fb6ff44f753312935f892244b3e751b23146a29b. 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/USNO11100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868df14d9037f61e177ba3bcf42cf2d598fc4aaf0c701a9d043fa98897577f4d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USNO11100438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eab14b1333b9a0a527fa3982626be96b0cbb3aeea4b14dfa548f48d2d5bc5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USNO11100439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a150be9c17a14f94b53d18c99554197d91d491f7444bc8944bf4b5aa24b487. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USNO11100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9319f8dd32231ffd830cf3670702c17df17d8df9f1d395cfad9bd7bd086b93. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USNO11100441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e8eaadfc51934ba582bce594ee0a1a7ce36e96a78807f6809059fff979af37. 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/USNO11100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe887c7706ada35167584e848e1c6d7386e05abf86e3b054f846451fa785c3da0. 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/USNO11100443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63770e05c4dc8f3d4af70d25f3e6fcbd423c0f1567160f95a37afa8c1fb4f090. 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/USNO11100444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506c524f21077cd214173a4a71d084b8fcceb096ffd331eb7d4db885211d014. 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/USNO11100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf7f0390a52f15228298dbd71f651a091cd5626c89fc0809f103a239ce758e. 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/USNO11100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94bd1bbafd20eacd0b5caa27f0879dd837cf0e9907f55f45ed1555c3f4440e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USNO11100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cf82ceb7288aac19b2e3064cbbef62bb25f74b7431e51ce91e06c735167879. 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/USNO11100448.
The Last Thing on My Mind (with Punch Brothers)
Inside Llewyn Davis: Original Soundtrack Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b5887b7d70e9c96e10dd38274e085d1aef4cb81c4e2048a121e9e918c23fe. 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/USNO11300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1fc89a9eeaaad2a0a32dcd6b3d95fa41eb2b6b19289ff5fd4221ff8b1d6107. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCN11000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068fde8cc193a9893bb0344ce28c955e614125048b476b91c85037fc91a659ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCN11000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0ed5d4edb91b4a0e858e3492463a10d7ce51869b97ab90dd6e992d399918ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCN11000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd72995631eb091c1c920934bf1e8bb0b48e2cdd8c594cdb01df91df9cb18e. 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/USHC41200305.
Die Tribute Von Panem/The Hunger Games: Songs From District 12 And Beyond
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f42c25def62d496cbbbca930e4fe223fa3514cb582f22c783ff08f3f9ffefa5. 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/USUM71201807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4ff645ce6381e903d4cb797bc0ec80e6f34e038e83964fd8f5a2b5136ccfde. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHC41100173.
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