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 0x2dcedd42f0c596bc1bf36c1e96f5dcf4ace2f17d02e4f04dbcf635cf1c74ff4c. 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/5a80b88d-9585-482e-b9d7-1b732ddd02ef.json and https://artists.proofprofile.net/proofs/artist/5a80b88d-9585-482e-b9d7-1b732ddd02ef.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 0x45f90c21f60f15d48bc23f6043ca394958b933408f86312f23fd592621ace1a5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBLGL1038368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ef34e22d3d63ae9dc3323e7df8e04c86adf4bed6b06c2831045a00bf35738. 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/DEXO52495193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d1331be2c40d3c858c40712c3e890a0869a573a6eb500eedd24977588ddf4e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AUXN22363160.
Old Buttermilk Sky / Yogi (Mono Version)
The Untouchable Sound of the Bill Black Combo
Twist Her / My Girl Josephine (Mono Version)
Twisterwoo / Smokie Part 2 (Mono Version)
Upside Down / Piedras Negras (Black Rock)
Don't Be Cruel / White Silver Sands (Rerecorded Version)
Bill Black's Greatest Hits + Bill Black Combo Goes West
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dae13e8472b37c2d5a5d2bb73b13b8fa8f113accf1ae970a018a7eb5ae46d7. 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/USCGJ0500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef4fa01198d81b714430e15768dd32d5b8ce4128abad1acac74b13dd0fde1cc. 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/USCGJ0500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b96435394c451a470f24f9a97f4a0025088f143341dd07d76070ac0dde4b62. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCGJ0500519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb7abf9b796c4192fbe362c01a9e6a6673b22dcb89b9d886e8d8c383dee76b. 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/USCGJ0500520.
Bill Blacks Combo - The Extended Play Collection
That Wonderful Feeling (Expanded Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801b002a736ca9f5b1c437f5def25ac03d05c4c507a97ccf8ba8c9245f234ceb. 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/US2HK1333407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc854c59dd3111cb464c4570ad63ab99e07155b4359d19817bed51d82aacebb7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US2HK1330002.
Red River Valley and Other Western Classics
Way Out West :Cowboy and Country Favourites
Let's Spend an Evening with Bill Black's Combo
White Silver Sands: The Singles & Albums Collection 1959-62
Essential Classics, Vol. 1044: Bill Black's Combo
Instroville! Hits & Rarities from the Golden Age of Pop Instrumentals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93044a2fd165599bf7a7918a3d9f5c1735e68e1f05b26b00c00ba075dc174649. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSUW0730363.
60's Instrumentals for Dancers & Groovers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e7abec235351d7307b7dbac7dcd23b48ca2231f34511b934ee2e6039146fd0. 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/QMBZ91332207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9c70500e386478ac875acb7363d3a0adc4fda92286a9e8f6a515b497bb4e9d. 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/QMBZ91332228.