Robert LeRoy Parker (April 13, 1866 – November 7, 1908), better known as Butch Cassidy, was an American train and bank robber and the leader of a gang of criminal outlaws known as the "Wild Bunch" in
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 0xda340a631d7c2adf075f3966f1c12ddafbc3a88f7c70ebed845cff6aec4fa38b. 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/d3ccf942-aed3-4012-b072-778b2efd67e1.json and https://artists.proofprofile.net/proofs/artist/d3ccf942-aed3-4012-b072-778b2efd67e1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5708a8fcdac1bd5f01d8cfa231557da99899f453377fe5cba31878c45b31f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USY3G0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c81a25a3d1d71d8b86b368280c4d7305b693fbc21ea593f14c267e976aaaf2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3G0700008.
Chillin' On The West Coast (feat. Pr1me)
Snoop Dogg Presents Death Row Summer 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413bbff647bdf8d02b6a2340ec1e2548dc867a1c0e5d2f8d21af039567b9b095. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2254845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a0e3655a09596613470ae8e25fee01bf7db7983279b5dee64e1e02b8614361. 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/TCAHM2326200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baad9ecdab2d5ed9ea7217cfe1b94f7815bbc810289fe40a30052c782f29608. 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/USJI10100543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe12c2bbc4ca1b3b8911aca557497ee50fe93a8c349ada4c275d87d4f880d994. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCA21000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5843aa8d4ff99fcc3f6c6586920835b42a1a54d93cae785d02a9eb0aa0816399. 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/USPO10001092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc97abb77fb9adc2c627261331cdae5acba398a696293f33e4118f94d55e10f. 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/USPO10101098.
Space Boogie: Smoke Oddessey (Digitally Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cc9125931b5f63905815d19c2ac2b580d09084e1a2a3d444ffd9e1b4eea01b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USGZ21243252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aabe5fcff2d2d7a26d7aedc89568749b2e5c6e89197e973815c841c6c1637e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USGZ21454285.
I Want You Girl - Malibu's Most Wanted Sdtrk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0febce5b0974a13665cb20a247390df4e30d0896c8af7f4ba424341c92f9ef21. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUR10300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9749d08d77918948505e02a16a92ac618f03b72490dd458842a251795a988aed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USPO10001122.
Day The Players Took Over (feat. Black C & Butch Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8032600e3af86037129b390a32a46c1dec1d2d286fae508bc117a0a8c4bca3. 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/USUYG1560375.
Bad Ass (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce2f07691fcf63269f8ee58a59b57a897de2ec613e24a618f284828f67625b5. 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/TCABD1234437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06187fa6c773b1a55a275c9742182723ec09726bc5024338667814ed9433e3ba. 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/USUR10401211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f327a0321dff39568c353a04227a40e93614031ce4e34fb3511f2f37c14b5a2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZDA51877218.
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