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 0x6748f32f22460e20684df7a3e86f1a7107a15a0bab9d9b5d69785be9a44aa08b. 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/ad66c952-852d-4aa5-a522-793d14898ef5.json and https://artists.proofprofile.net/proofs/artist/ad66c952-852d-4aa5-a522-793d14898ef5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Happy Hunting (Original Broadway Cast Recording)
The Boy Friend (Original Broadway Cast Recording)
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 0x1274355065061c414c26a5b55e60a2a2b899e3152d07955b3c11593b78c42822. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBBM9302014 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6223b6b9b537aa6145fae370463cb7700dbcb2fd037bca921d3bf484bfe2f. 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/GBBBM9302019 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25505d41abc7ad1097ab210394135ff83cdf9617c0919d98b9c0dcff143d9917. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBBBM9302021 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352866512c202ac1772ad91905db368c046a5f1e10fa332b0986bbb7f107087. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBBM9302024 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8f54df927c5075cdc8dcf445bbe513c09ed48dcfb9cc301630e9d7076d3454. 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/GBBBM9302028 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2ac97dbf095a352851a7fd091d11411865e5a813f5ac0f529faef4e37ecf4. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBBM9302029 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe589cccd00e00af410aab6d9967d84bd4dd2be2bac55e7e0c6d9b1ab39837ef. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBBBM9302030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b06377eef76d5ee54115402541b33a585469e6dc46afc35d981ce48e03a7401. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBBBM9302032 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b74ff8c5fe9fe663cd94cfa4a9392e883d253c9900b11c94e528fd5bfbc628f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBBM9302033 — a six-check JSON result.
The New Rocky Horror Show - 25 Years Young
Sondheim Tonight: Live From The Barbican Theatre: Complete Recording (Live From The Barbican Centre London)
Forbidden Broadway: Special Victims Unit!
A Very Merry Unauthorized Children's Scientology Pageant
Hair - Actors Fund of America Benefit Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3544f7a96b28aef569a25a19532893fab1f6d234df9fc27f78db88f2a5619062. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBARL0601770 — a six-check JSON result.
Jacques Brel is Alive and Well and Living in Paris (Additional Bonus Tracks)
Jacques Brel Is Alive And Well And Living In Paris
Loving Repeating (Original Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cf29dc07b228289b58ad751aea4d878cd23a876de60e65283f723585ec497f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USRC15607677 — a six-check JSON result.
Noel & Cole - Let's Do It (The Songs Of Noel Coward And Cole Porter)
Imaginocean: Original Off Broadway Cast Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af9c7ef8fc0e7b88fc4fa9b56172e6f4ab847ab19a77b4e93c610d01c035229. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBX2B1100007 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a46271db910dc18d6c064584bf788a87c87df66dbd7bb17f5f43a566ec3bbc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GBX2B1100008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c87a6c38f0a56cf1d369f885c37f9ab4add088a834561f345574371a494ffb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBX2B1100009 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fb8d501f2e612c9e6fea1d044f7ed1c9d14d6bc80f510814162600c17e9605. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBX2B1100011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f846f18f704cbef2e2b3f5099e29c72d695b47cdd85b9553f555ded8bd93d34. 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/GBX2B1100017 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94796604733343f35624ee4fde5a6ef3266f431392e1bfd0755159a74d3cbaaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBX2B1100018 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc81f89383df6a040ee3c46468e3e42a73cdd52f30ab087b16b46f4cb8ec405. 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/GBX2B1100022 — a six-check JSON result.
Unchained Melody (Dance) / The Love Inside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd470cd734eb967d54128fc5e3eb9ceaf0232e7e8f575661d973ed3b8b224b3e4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/GBX2B1100024 — a six-check JSON result.
Freak Dance: A Film By Upright Citizens Brigade (Original Motion Picture Soundtrack)
35MM: A Musical Exhibition (Original Cast Recording)
The Sound of Music - Original Broadway Cast Recording
The Sound of Music 1959 Original Broadway Cast - 50th Anniversary of the Film
The Sound of Music 50th Anniversary 2015 Academy Awards Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09850fa41b113bfdcf2d5c84560b4e8d278afcd47b7daccdcc73cc33c6640d0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QMFMG1513824 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e6b459edf91dd55edee2e144e882ffc599ac05b2267cd195fe3a54e54cdda. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1513827 — a six-check JSON result.
Iedereen Beroemd (Original Cast Recording)
! ! ! Piano Covers of Movie Soundtracks ! ! !
I'm Not That Girl & Other Musical Covers
The Threepenny Opera (Original 1954 English Adaptation)
Charlotte Sweet: Complete Recording (Original Cast Recording)
Scrooge: The Musical (Original London Cast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2220938a06fbd6379dcbefc835de47a3bbaf35853219cec708eb2d7a82bd76c0. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/GBDGA0301737 — a six-check JSON result.