thumb|Joe Kirby circa 1915 Joe Kirby (October 5, 1863 - February 8, 1926) was a self-educated son of Irish immigrants who became an important figure in South Dakota history. He helped shape South Dako
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 0xdf2aa7a268232cdc7283b1b079ed5ff19a5edb6ef915e363a809f4624b59b43a. 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/7de4905f-74ee-48c8-873c-caed7c88bd04.json and https://artists.proofprofile.net/proofs/artist/7de4905f-74ee-48c8-873c-caed7c88bd04.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 0x552ace6d3bc3e68b7a15799ab2a4d788753c474e8432e67cee74a6ba9b2dfc53. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1583110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ec0c0fdc74b789d7ff61d49c9dceba3cfcac9e759551e5d3d2c83b60aace8. 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/US23A1583116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d16c923e6c32fb8bb84cbfa8e9ec3f5e7b7855d38550a56db2938e98a54b9. 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/US23A1583117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ab7572d3c67109bb545ebd4732a67e5d3471110495062c4185561b55393096. 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/US23A1554989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362b5dd4f9eb03d52b92c1f397b74a6a1acdb234f1411d08e5ef6c67242c61f. 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/US23A1554991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fba8907eb513ca51fc460cdef9e5dfc5f20760a2e1c729b5ce3ea9fb9c57081. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1554992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe313cdd0bc0523f9aa393f2e9689cf5174b86148e4841d460d7981d896b88c31. 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/US23A1554993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3031b10f73d6d280e1510b20b3acb152c60a6ecec70c9881900df64b0748ef. 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/US23A1554995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72433ea2bd6db6b1ba885726e87ae811de2da79ec07d469fbc7d92eff68f430. 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/US23A1554996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe962e860c9cf5c7decc59539fab24c2deb491e6a8e7e3f89e85029f09cb03d5f. 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/US23A1554997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9263cdc50d1a2cfa20264e9b5eb3bf3917cde0eb3dc2347ea8484756264e1095. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM72202698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025f666585ead71b00eef76a63a66c084fe6b7c7467c42ed137e24bc59c80e94. 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/GBUM72202700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da242d64310f73be0194ec8221bd94e66c6f682b50f394e029b4658148a9966. 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/GBUM72202701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa637b7386dbf1d08be96a0ca39d350ab914cf2824b156d9ab5acbee6bc8d2. 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/GBUM72202702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ac83e4c3dc69f2176aebd8d1e3c2b79bc8fb3160568b0d6587934b9ad6c6d. 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/GBUM72202704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ec0c0fdc74b789d7ff61d49c9dceba3cfcac9e759551e5d3d2c83b60aace8. 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/US23A1583116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5fb1229952eea98cd44d42f5d3c60bc5985f0949515d7dc944a0c439f132c. 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/US23A1581162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0570fc37053fe19897f5b963d287dcce2cbe046618799b60de787ec6f36a3bf. 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/DGA0R2303664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39baae06c010302580d608c612b30f33ec53435a3ebbacd45ab9b25636ba2718. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0P2304181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7317934ef25edac3b4dc02f9af96c8ce56f9321bfcc8c3b0e8538e47ea102b. 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/US23A1564444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0807f95069f6d9918519ee3398bf37396ac2da1b42aae38580abdf017904b5. 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/FRX762395811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ac6d2e63965fad551f9fee8ff48ea3371732844a03ef6686eafa149e23848. 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/FRX452308755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe962e860c9cf5c7decc59539fab24c2deb491e6a8e7e3f89e85029f09cb03d5f. 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/US23A1554997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99ad04d29bda5f70f434984936ad46664f1e4e74dadb84da1d937c10044490a. 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/US23A1545439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aeea7fce0526930de73c186864de72ffcbf44527046de2f46dc63d174288c0. 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/US23A1545440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2746df3eb0285b538822658e65010c4495fcaf704da40e60ea10f4fd4b1d332. 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/US23A1545442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569552bef3c427524e5ab20a5eb92a9dbcee1f0bebed3753c00469120bcb15cb. 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/NL4YD2100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34806d70c5d8cf5cc235f6afe36daf2902f87c2a1ffad9e3b6c217c54cbf059e. 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/NL4YD2100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30235b455a47f68b75a2745d70b5e48e47a5627619526da84eaa75baf3dfd4b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL4YD2100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe977e68420fc4b77796412b84b658ea7996b2f1eae07c54d113844a41cd32d88. 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/QZMEN2130415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471fe2a73c67e293ee9c3847aa959edf1a29c2c35c33069ec85335a41383a855. 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/QZMEM2102342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636c7557323d97796f94ee30304fe8b7add17bfa801d5ac192992db095944bc. 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/QZK6Q2165055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ef7189612c981fbc96cda5ccf388fc66d67844575aeed619db83b2a77cbe79. 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/QZHN52127109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0168e4ae635e69ea252e2e7d296cbe31a261f8b8ef9d6f8a391b9f067a2a66. 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/QZES62128211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4be1f548fb58557e1d56295a5441be1d806771cdbc3292609b1d7a0454116d. 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/QZFZ52194533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02ea05032ae0e67ed532c2ae3958ed9b087a74ec47bf2d79db29565b277e35. 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/QZFYZ2118392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6350951e6fa4be892ceccd8b3ab617f3b561de247368d3e5893aa92262532c1c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2093550.