Barth may refer to: Places Barth, Germany, a town in Mecklenburg-Western Pomerania, Germany Barth (Amt), administrative subdivision Barth Island, Nunavut, Canada Other uses Barth (name), a surnam
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 0x7c6eb32934c5efa54c34a01036bc8c985ba3c37a261ea14ed4aa232780761c78. 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/23835390-3b19-48ac-960b-1ac5dfaecc1e.json and https://artists.proofprofile.net/proofs/artist/23835390-3b19-48ac-960b-1ac5dfaecc1e.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 0x5d3f1ce6f7395b238ac7a9cf62ca0598b0c7f45bda4e50adac97acc296925c28. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FR10S1476080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8581eacd0d9afb80d70e181984322f66cfd3be526e5f1f4a61c6187964ff6d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:42Z), 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/FR10S1541545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c52ef89b55c5e8673482436e3bd7b6be4b3ecbf8c70982a3431acc0a908f952. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX201617090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eea7e6e4b7251468a5a6949363cbe472937651007949a8c00397b2db166a84. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FRX201617097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f809c16a2dba0e3b1dba159da37d132ff732d4a7bab0aedbad74d7b4acbbb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX201617101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49ac37ae8945bab54a3fffb616682f7d9d9e79390f182aa0d91cf14ef3e42a1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201617102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a82a50ca04242f67ae4a915d55a1ce49bbfa766a4fd7b2b16af641a69cf56a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201617103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b5701d17f1601eb641ff03d905d5c2526505cd1c2c62346fce4eb30a9400f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR2X41823621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891d4ecbaae4b0862b0563f6554e8bbccbdbfc26b199b8f6b80706cbdb8494d1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X41823625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9292a4ec70776691e4a0a7a92c37dba826f408a10f669364b57aefb6b15b44. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1968052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59139b4fac21622d3fc12b8ee59e96c755eaaa17a5e61f83ab416acaf1abce88. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201962838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981edd379750a27e1806ff5c7258eaeed95c3252cb71ee2b7570865ebbb20a9f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S2047364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c170de31ef44543280685865e4afbe2730e1ab2a1a39dcfe5c049b844059b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202052989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286409ce1d8afd08fac343e9e475a4735429c68ce01d713ec437bd01fd911858. 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/FRX202052988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c170de31ef44543280685865e4afbe2730e1ab2a1a39dcfe5c049b844059b. 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/FRX202052989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0e661f57bb438da6e28db6cb9b6cde3bbaf16f48012303e9e104ce83b83349. 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/FRX202052990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afaa7678b950b3a54cc4f8d54d1cef4abc7d38548b3d902f121c7c37abc88ae. 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/FRX202052991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6ec4d52ba199d814a0f0c217c0385e07da73f2755ef9c8a62c8e44279bd4c. 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/FRX202052992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81ed81eeb101206a756805c3a400dc52eea98c87b55d941a0019c0f4ca1e83. 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/FRX202052993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937c8f5224afe59b113bb8461bdaffb4cfb73d629986758a83e38b8af7ce7bc9. 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/FRX202052994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1601b32a7ab5b78fd6c01ab0470038c41e48393e5b6b327ddadf96bf7f4ee491. 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/FRX202052995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa565f91123e80ad93dd54814abd38e24b8a96f811addc50df306caf09240c8db. 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/FRX202052996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59139b4fac21622d3fc12b8ee59e96c755eaaa17a5e61f83ab416acaf1abce88. 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/FRX201962838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9292a4ec70776691e4a0a7a92c37dba826f408a10f669364b57aefb6b15b44. 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/FR96X1968052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183be43c8c7d306ad682cd2c2d587dabd302cff52ddb7d4f2c7fa51d9f80b9d1. 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/FR10S2047363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcaa060cad2c5bb3865a87ad7c32d938dd5f8c23dcee3e201e3996e9b403be4. 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/FR96X1999799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682384f76cabcec8e4b2df2f80fa20bfe89d76154df755210509671f4405e41f. 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/FRX202052997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccae92167e4f5c71287e024b50292e6f49920ece5a67039fc4352a5b888f3d54. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762159864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0962b873e3980c2b249f03e007c5103a6e29089a6c118695e4e44ffbf41464dd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X42354803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970f50fc5f612bc778dfa0c5ebbe28e2f52d8f2b4ee756144e990a2e93964cc5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X42354804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8623464d212c874fb54ad0f08f7bee0566a26d7a09d732429beae42645ec43. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/FR2X42354807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfc3ba32820a26cf8b2062cf8a6bdd581749525e2dd58a96d2745427a219ad1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDFE2300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a752e920f2e864cb48ff06c23773b4827616e11b15a1adedb99b013a2a646bb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDFE2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b79f8ecc504835ade9994b6c2e301bfc3b05c07006156ffd4ec214196f7c313. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDFE2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045e01618437a05f7bed4499f0f09c8d0b1fd4c1f21fe7185137098f0a9f18db. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRDFE2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc4310f9aa2d76ccf70c3e5679667ef287c1b4bf6048b77bc6d714761aee3d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDFE2400140.