William Lee Apostol (born October 3, 1992), known by the stage name Billy Strings, is an American guitarist, singer, songwriter, and bluegrass musician. Three of his albums, Home, Live Vol. 1, Highway
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 0x1835638646735fb8a5f79d0906acba2820f13ebc76222c83c8a4cfb15e59dd1d. 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/39534a2c-2486-4353-8fd3-20bdbd57a85c.json and https://artists.proofprofile.net/proofs/artist/39534a2c-2486-4353-8fd3-20bdbd57a85c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cabin Song - from The Hunger Games: The Ballad of Songbirds & Snakes
The Hunger Games: The Ballad of Songbirds & Snakes (Music From & Inspired By)
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 0xeed060d0c90840c2a9a68fab43e437638c7ccb3f9037fee69f9b272cf759b260. 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/USUM72317044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd22bde8d9361b36ef3c1aef6d9579e7432099495d5276cc81881035ebe1630. 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/QMFMG2341006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bd731f6fe397682252e40b46df0a16f466f74a2f4ac85c895a49af55987771. 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/USUG12207650.
Full Set (Pyramid Country, While I'm Waiting Here, Little Maggie) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410faf6ef506f98c5906bf03046e10c4fdf0e9532d9913e3417da3bb3f1297ba. 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/TCAEY2054112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ffaf971efe9856e955ecaeb5d2a126c5fe66660cf5dfc2502387535829fb92. 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/USWB12403008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb686456ebec4819ad6328785f9e840fdbdb0cc895f9694ab13be4ef5a0851804. 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/US6XF2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bd731f6fe397682252e40b46df0a16f466f74a2f4ac85c895a49af55987771. 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/USUG12207650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b43b2947dfe3bf4919469727e0ccfa6a91a039e53aaad306244a55c56516db. 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/USRO22102626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cc22b5f25d0552844d4e12d8393e62e66c7224b8ecab0302b759755f453bd9. 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/USME32000702.
Black Clouds - Live (Cumberland, MD 5/24/19)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14531a95862684fb2d23f590a79f02ee81af02e44cd0e26c8f88a4fd995e3df7. 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/USSGI1936008.
Whiskey River - Live at The Hollywood Bowl, Los Angeles, CA - April 30, 2023
Long Story Short: Willie Nelson 90 (Live At The Hollywood Bowl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3378a4296ab5db406746c088df2a9798ed91f90e9d0b534c32514887cb2e23. 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/USQX92305717.
I Gotta Get Drunk - Live at The Hollywood Bowl, Los Angeles, CA - April 30, 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce5df18d9701cb160682a79ce8cd088f69989be403faed323a70a460ed501e7. 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/USQX92307225.
California Sober - Live at The Hollywood Bowl, Los Angeles, CA - April 30, 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783b469e1c2935945adb35e11759a508e8ca5faae8ee0c45b01c2d37a18a28a. 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/USQX92305735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28191e8748a667891abf9bcf28612a81fca31ea0a48b3b67d84cb634e88e24c0. 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/USKRS2300802.
Slippery Eel (feat. Billy Strings & Chris Thile)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2050d673bbfc7dbb44d7b12c6a2778b80846f67e967980ff382e68239abcd9fe. 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/QMRSZ2100783.
Charm School (feat. Billy Strings & Chris Thile)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2dfed7c410c7afbdbdba81c212be277c23328512ab94c636e384775d36f935. 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/QMRSZ2100779.
This Old Road (feat. David Grisman & Billy Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8507ce0249dd151820818536a0f88056b77da2280a0a5fbae109d50c5d847. 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/QMRSZ2100787.