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 0x2a38e7a57d402b47e94bad527d84ff124653b8b1e318df06c2b7ce18da012f8d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/572bbe2d-d747-4250-a8b0-47a4b749078f.json and https://artists.proofprofile.net/proofs/artist/572bbe2d-d747-4250-a8b0-47a4b749078f.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 0x8fdc200499e9fcc16d0a043e8753c3a46bce2814e8c045c5b11792ce5bf32491. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRRAR2025622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3826e8ffe7c6a300fd8cdfdf5610d042d912a58ebaacf8eae25df188649060ad. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRRAR2102047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ad7ff2112ebc14c5d7d1dc7a9cf1b76535176348dbcfb7e372ee84d1839cd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/KRRAR2102048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b941894d3e1cb088cbce82b8aedc73a58b084b114a239f1945764f6d535d094. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRRAR2102049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816cde9b064a31f3689b1e7ad0945593856c631309c59ea3fd5112de392800d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRRAR2102050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f76f218798dcd7c3f9be3a2e06b0c4ed9a6c4efb013f2cfc94f6747653c1a3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/KRRAR2102051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0863689c8cd545eedc3f297ec32049d31988821bb75185395e206f3ffad6ade9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/KRRAR2102052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0139d0a5bc95f763feda371e091d29e90ace275e5df5ea0606151ef917934c2a. 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/KRRAR2102053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f168863cafb581633f4823f6d87ec85e56452f70a77a18f0ddfbbc0724fb485. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/KRRAR2102054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f73994aad3013506b0544ab8d2c314977d506f6c9656b880f30bd13317155. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRRAR2102055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85842758c16acaa2298c6f01d9f67f10d39462e41db7b10217257323e1c0ab40. 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/KRRAR2102056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6af081087e05f947ec24d706c91b34b625e2d93c43ab98d3412ddd6a622fb2. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/KRRAR2117114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81be989c6a6c2fd2c2a8989d97293eedb00f609d0013f0034133f00a0e5e0c19. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/KRRAR2117116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3e5b3c3649eb04200f45e597e296824d4c5974eb3f46280aedbe53a750ec68. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/KRRAR2117118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ed468c3022831d082b48697b5e2f51a8f50bd7a021df2ba942de121e595fe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/KRRAR2117121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffa03a0f29292e8e67b2bd226a82679f26f81c60c2ef3fd10c556e7bdc2cb7d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:29:46Z), 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/KRRAR2117680.