Dan Bern (also known as Bernstein; born July 27, 1965) is an American guitarist, singer, songwriter, novelist, and painter. His music has been compared to that of Bob Dylan, Woody Guthrie, Bruce Sprin
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0739116ee96979dab7492c5d7f52f894e0b67aac54687f05ab39cbd04e3e88b0. 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/d7d28c51-5edf-48a5-8f51-c971d7f5289c.json and https://artists.proofprofile.net/proofs/artist/d7d28c51-5edf-48a5-8f51-c971d7f5289c.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65019185eecaaaa8bd427d7f919866f131d9fb1330e685402da69b09e8ac34d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USSM19604042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78388451b2d6d9b4e8e78f194fa11dac6bfca1bc46bf291a85b2c9fb3e2f34a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USSM19604043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ef8f07ea682de6efa02335a08e85419e5f46634985c6b6939de938afa53b74. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USSM19604048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07a0477ba40a0774fb4649699e6555f83c4af1ca03896a41f57400dfef9f855. 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/USSM19703781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400fff2cd7ac441d9079cf7e4bca1071ff7a3290e9221ca70ba58dde881b2fba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US36M0400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97269f58815cb546b5f5b76305abaa72938fdabf753f0abc135d814b89b1c0ed. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/US36M0400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689b6b75a6147ee9b41f97028b0f6b783cb3fe84219c5ba64b7577003863b3b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/US36M0400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587aaa303468246e5ff8ccb82df0a6a85daf2e2dab7c932a8bcc92d779140f00. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USTC30700519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed4f94248533641bade1cebd202f69d4ebe7889691d5aa3fb5c7ffbe7f0179. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAET2007950.