Eric Weissberg (August 16, 1939 – March 22, 2020) was an American singer, banjo player, and multi-instrumentalist, whose most commercially successful recording was his banjo solo in "Dueling Banjos",
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 0x62a1dee1ada2cea2360b653a01ae2ec94ac2699980ca46e4bd34c38aeba0876a. 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/64a3a466-7be9-4f44-a7cb-1239323f1570.json and https://artists.proofprofile.net/proofs/artist/64a3a466-7be9-4f44-a7cb-1239323f1570.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dueling Banjos From The Original Sound Track Of Deliverance And Additional Music
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 0x5dea30ce3d46741ffbdc67a9a72c4ded1d6748facee54d35cbc51ec7a09b9af4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USWB19904170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef573d787f1f083eaa8d6a459a93d02373c07fea7e5edbc4a029c4e55ad1041. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USWB19904171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a194b09e07843df50e2a43a5595e769863a23d1547dfae305a3cdd7a40a8e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USWB19904172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eead01f08c561217e2b2b1f233858c999a81b1e241f15d33e6713f23f50718. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USWB19904173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b92f64da0deca6653f8f083fc7fe0ea7cc2c8940387323316a3c8338873c2f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USWB19904176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530c873f25bcb44fc2935f7f5c75e02182fcbf2b094540eacc8726ac1a15394. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USWB19904177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b8e82fc1563a7d47930771537f818c3c409ca5ab560fed3827a47c5a37ee33. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USWB19904178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a82da4164cb2c63ffba666f7f463995f4c841a4087daf4d6c72703d129a95c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USWB19904179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bc9588fd7e6e2972209cb383d51e09409b92b00dc91b47950c919e4c25b4d3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USWB19904180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa683895cc4b2d5c471e3fe728c2394866f35b393565bd7b73d47ff89afcf6b6c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USWB19904181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627abc8fcaf7e24c207806e5fb0035a2e11976fdba5d3c1212df8df2ab8ef02. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USWB19904182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaedfd3b2204604ae1153d0eb1feee0961b58c8570b5cf786b274cad48da76d0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USWB19904183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d11f4b46f99833f6bf49a3243a913b4bbaa7368a1f8f7126e58c5437402470. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USWB19904166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b3d33950b86e3578481a911d0bce669ecb8d7309c594fde1b9325e7b440461. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USWB19904175.
Feuding Banjos - Bluegrass Banjo of the Southern Mountains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16ccc6d5b0be046b373ff1597be7cdb4e4dd3a4bb5c3899bbb44a23091ee084. 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/QM6P41932563.
Mountain Breakdown (The Bluegrass Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38871889b4e72c181fde2cfbb27814a2d867d6d35aaa8ee8d6fa5105fec09417. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3M50232103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d11f4b46f99833f6bf49a3243a913b4bbaa7368a1f8f7126e58c5437402470. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USWB19904166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d11f4b46f99833f6bf49a3243a913b4bbaa7368a1f8f7126e58c5437402470. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USWB19904166.