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 0x29d360a43c0312c36f445c425774aadc186fc184a5a39ac7a9e52a7e7e7920f2. 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/07df1a1a-5493-4a53-9035-434e257f76a6.json and https://artists.proofprofile.net/proofs/artist/07df1a1a-5493-4a53-9035-434e257f76a6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Elvis Presley at the Roller Rink: Solo Hammond Organ
Grateful Dead Workingman's Dead: Solo Mandolin
Saturday Night Fever: Solo Fender Rhodes Piano
Willie Nelson's Red Headed Stranger: Solo Cello
The Replacements' Let It Be: Solo Blues Guitar
Carole King's Tapestry: Solo Wurlitzer Electric Piano
Bob Marley's Legend: Solo Country Guitar
The Clash's London Calling: Solo Country Guitar
Solo Mallets: Arthur Lipner Performs West Side Story
Top Hits of the Beatles: Solo Wurlitzer Electric Piano
Solo Country Guitar: Ben Hall Performs Nirvana's Nevermind
Solo Country Guitar: Ben Hall Performs U2's the Joshua Tree
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 0x4f1aba4b88137de2870e8158c29626a34d5401a97818e91ac080c4ef58013e9f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1600123 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcc3a88f77416f80ecf924a72b5047e374eb560062096ac723467670c677f66. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1600130 — a six-check JSON result.
Solo Harp: Johnny Cash's at Folsom Prison
Solo Piano: Cliff Carter Performs Top Hits of James Taylor
Solo Slide Guitar: The Velvet Underground and Nico
Solo Hammond Organ: The Big Chill Soundtrack
Solo Wurlitzer Electric Piano: Sheryl Crow's Tuesday Night Music Club
Solo Wurlitzer Electric Piano: Miles Davis' Kind of Blue
Solo Country Guitar: Johnny Cash's at Folsom Prison
Solo Piano: Selections from Ryan Adams' 2005 Trilogy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daa2c0bd6b18e95aff4521904f2b5886b5902fb3b1f86863a98f081ab510317. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1500088 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a0aa861f901b63d7063d1c3fb1e1e76ef9ba47dda82b7830c6843ac831b581. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1500094 — a six-check JSON result.
Solo Country Guitar: Top Hits of the 90's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdcea55e7841dcc9c3e4c6bb4799460ca349e10e1e4b4e6663dfecb52f2051d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1500115 — a six-check JSON result.
Solo Hammond Organ: Michael Jackson's Thriller
Solo Piano: The Rolling Stones' Beggars Banquet
Solo Steel Drums: John Coltrane's Ballads
Solo Harp: Leonard Cohen's Songs of Love and Hate
Solo Wurlitzer Electric Piano: Steely Dan's Aja
Solo Pedal Steel: Top Hits of George Jones
Stevie Wonder Songs in the Key of Life: Solo Cello
Solo Saxophone: David Bowie's Space Oddity
Solo Pedal Steel: Top Hits of Hank Williams
Solo Wurlitzer Electric Piano: Peter Frampton's Frampton Comes Alive
Solo Piano: Rolling Stones' Exile on Main St.
Solo Steel Drums: Louis Armstrong's Hello, Dolly!
Solo Vibes: James Taylor's Sweet Baby James
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a900e2cacde609d403295a7274b461fd78aaf9c486a515836c549dc0609dc55. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700261 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c03fa35be44d9fe6aab4720baf2e1b4915e69e643908108d435e93878f149f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700262 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dfefa34ddfefacb1810d756c2c2c891cd05181dbf00aaa596582d5d9d9bef7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700263 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22d26de75140ad44e6922275e9ae8838dbcd758eb2e2e043c77f141e2c14c89. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700264 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe265dcf43d49d231c676e1c18ae3ded68561e37fa035fbf4761b20daeef0c201. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700265 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc802430a32024fd93044f111896df588f3b7d017efee965ae82f5d56130cd18. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700266 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a9db6686935a0681d3a7073a3654ae7bfeb40d2495610d71e57855b5d33779. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700267 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b316723c1724bc84e00a038d4e3b219dca5b4a1de76534d9087e970b7c148. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700268 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41466d8afcfdc0ee1d4530eb9806903f1c89213b40c4da3a07fcf4da2cd4a82e. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700269 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342d9d426f8d128a1bed4c93b1c668aff4bc37ffbd48710ccf1897999a37e993. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700270 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba970ff34e6844abb01717ddc24bf468e74f4b39c2b353c17469334d839186. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700271 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84c846833ce9a29eea700ed14c5686639d5ed5346da33066d9f2a809714cd8c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700272 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0a1c0fc27f5bdfb6c1b19958b8e0f0f9b2ef19986ad5c6c3419a0fce0ee7d9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700273 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a96edd65dd13eb5534b37cea0d162a0a28df33dcfcce917b541531557ccdc1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3HJ1700274 — a six-check JSON result.
Solo Guitar: Pete Kennedy Performs Top Hits of 1964
Solo Hammond Organ: Rob Arthur Performs Top Hits of the Beatles
Solo Mandolin: Jimmy Ryan Performs Top Bluegrass Favorites
Solo Piano: Cliff Carter Performs Top Hits of Van Morrison
Solo Cello: Trevor Exter Performs Top Christmas Favorites
Solo Fender Rhodes Piano: Rob Arthur Performs Top Christmas Favorites
Solo Hammond Organ: Rob Arthur Performs Top Christmas Favorites
Solo Harp: Katie Curley Performs the Nutcracker Suite
Solo Slide Guitar: Mike "Slo-Mo" Brenner Performs Top Christmas Favorites
Solo Blues Guitar: Jimbo Mathus Performs Lucinda Williams Car Wheels on a Gravel Road
Solo Cello: Trevor Exter Performs James Bond Theme Songs
Solo Mandolin: Jimmy Ryan Performs Top Gospel Hits
Solo Ukulele: Pete Kennedy Performs Top Christmas Favorites
Solo Electric Guitar: Eric Ambel Performs the Christmas Song
Solo Electric Guitar: Eric Ambel Performs White Christmas
Solo Vibes: Arthur Lipner Performs Top Christmas Favorites
Solo Blues Guitar: Jimbo Mathus Performs Squirrel Nut Zippers Christmas Caravan
Solo Steel Drums: Arthur Lipner Performs Top Hits of Drake
Solo "Vintage Vibe" Electric Piano: Rob Arthur Performs Stevie Wonder Songs in the Key of Life
Solo Blues Guitar: John Cougar Mellencamp's Uh-Huh