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 0x6298b184dda825202d66af19de0a9c5fec691317ea527319451e724d263cff00. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11f7dd9d-9d6a-4988-953f-ae2a80c60c44.json and https://artists.proofprofile.net/proofs/artist/11f7dd9d-9d6a-4988-953f-ae2a80c60c44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Really the Blues?: A Blues History (1893-1959), Vol. 1 (1893-1929)
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 0x037c5f3489bd4ece7a9865578444fec111be53a8870ea07b3cc76d2b2d81b1c9. 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/USA4A0901004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c22dc92f6899ebcaaa430d30a050c49acae1d76dce61b87970d74687bcdf50. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA4A0901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa889651b826242e57b29b1ff80d75a7a2c858fc4d2e3442fc06f6c7b32822e. 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/USA4A0901011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26209deb2bb314bd676e57f030c2e186b84c2bd0f5bc71862b5b6fed68d374a7. 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/USA4A0901012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4726c23e7afd3c8480453a49e1ac4b984ecfd8197eb27fd3212b751fabf9dae5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA4A0901015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fe01a0f3acd7eff57ade18b0aab4fdcd81ddf39b703af9d1223562c7f0a699. 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/USA4A0901018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f9ec16264e2f4589c0ea818ce30b082f60109a6413a25fc0855861137432a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA561074088.
Mean Conductor Blues / Frisco Whistle Blue
Top 26 Classics - The Very Best of Ed Bell
The Best There Ever Was: The Legendary Early Blues Performers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495b013225480e0d6329eed346720c53a5e1c221d5db681739a7cc04d321fd10. 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/USA560548410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7903ecbe15ffda4d8e990c2ec0bbb037a122e385f964ffb923ef8b8c3729edd3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA560548420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa7e12bdf56132fede3924ce51887c9359f38a8f37acde3df3490bcf6ad7d8e. 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/USA560548424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb522af942087ef24a5b865406bf6625b4a6c349b178e0f29ca6778639854c3b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USBS90703704.
Africa and the Blues (Connections and Reconnections)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a186db461a5d6c1eeff34a1acc09034d7da65dbe0f2b374a587d024e38621d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEBL61267005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bee31081caf64246652fbfaeaefbf4ea71341d5f3f64645c8d6c500244b761. 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/DEBL61267015.
Times Ain't Like They Used To Be, Vol. 8: Early American Rural Music Classic Recordings Of 1920'S And 1930'S
The Train That Carried My Girl From Town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932a2d4b7e13c757020c619b68357dff41927a4ba8fd6cf6e7fa1e44f74810b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560553125.
Times Ain't Like They Used To Be, Vol. 7: Early American Rural Music Classic Recordings Of 1920'S And 1930'S
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2627e165927094aa07173d813f4b2b4b6a0a4c081e47ef1e60f9cb89e751c4. 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/USA560553156.
A Richer Tradition - Country Blues & String Band Music, 1923-1937, CD A
Rough Guide to Unsung Heroes of Country Blues, Vol. 2
A Richer Tradition - Country Blues & String Band Music, 1923-1937, CD C
American Pop / String Band Music, Volume 2 [1923 - 1937)
A Richer Tradition - Blues+String Band 1923-1937 Vol.1
A Richer Tradition - Blues+String Band 1923-1937 Vol.3
Tie the Knot Tunes Presents: Shotgun Wedding Song Playlist
On the Road to the South: The Blues - Volume 2