Cat Ballou is a 1965 American Western comedy film starring Jane Fonda and Lee Marvin, who won an Academy Award for his dual role. The story involves a woman who hires a notorious gunman to protect her
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 0x819d9f97719986ee8f0bc765b191225fed08f54987b3cea277818d4c2b67e954. 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/90786d98-8de4-4a67-999d-32547c09aa95.json and https://artists.proofprofile.net/proofs/artist/90786d98-8de4-4a67-999d-32547c09aa95.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 0x447db91b386cdff0b33a1bd5620bbacc6ab8600ee69939d8e1c10d99a3903324. 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/DED191200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b52b2e8c98781bf9b77b4716c99c5fc3ff706a3666866a52abbb6e86a2f5a1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DED191100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf051d565e5fb4d704b6b8f25f29acc2dbb9d4fd3d9712d0ec9916b568dd251fe. 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/DED191700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dc8db1f155f710a0bf10da1207a82c8b93fc7c0124c14c41e42218489b57e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM72205649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0535943e1aa57ffcd6832a9eb66b9963f2c4208c27414803f6cbb39496d7abdb. 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/DEWQ72200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9617928f100b699c5fb648d1f5f855dc02b05f54a806cb6052621dbcff2e23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEWQ72200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38461dffc87bc8e175f35f37c1775ffc47b3778ca8332a0ed4a8f44caa8d85b. 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/DEWQ72200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f70bc38c765ea12565aab27e9418f1cb6ed6d0f750369037e7db810a449fe09. 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/DEWQ72200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f81010ea543a209b138bc8624d930996159c7fc0ec632055834b7081e3b568. 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/DEWQ72200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a221a2cae11f2e62e35f1b64cbd8f269e9e2ec1cbea229258be6771f6ce9238. 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/DEWQ72200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d91a5d84a56133b943713c5e2e6820c3c7f1abc7cbd25b41d2a7d20c8ba415e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEWQ72200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c87e7b70f7943e0523ace215c3f90524fe14731770db3b66fced03b93494ee. 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/DEWQ72200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145ba6b09a1d0bc03cdc3f07830e5e8b61250ec3beffc87a65c71a8da95f11bc. 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/DEWQ72200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf788d5025dff2c451cff88102f0c5736ffefa43066a000a9313c021077a09bfa. 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/DEWQ72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3710c55ba85965d38221b699b49bdfb367c6f07ca52e1f5dd49550a487eefd4e. 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/DEWQ72200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0afe081fcd7b225e04123b1fb67b8bf75636c719ce27c84d79f1b85e5200d02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEWQ72200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949f9d3182cdc21c7d3d30e96cbc47d821bc4e9d6801b475e7cf22b76e494820. 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/DEWQ72200037.