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 0x8824fc37362865af0b5bc695b88115aeb1adab44e52e7af57f8fa76777e1dd56. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa62c0be-10d7-48d1-8f6c-5d1d037db601.json and https://artists.proofprofile.net/proofs/artist/aa62c0be-10d7-48d1-8f6c-5d1d037db601.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 0xdbf3838527d5493a774b6f094bceaf324ea556353949d625e9a738bbd77bfa0d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:59Z), 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/TCJPB2490600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2981872c5ac6e48dd325d112f0ba91b3e5dec447cd3284b61d2bd3f26b050c4c. 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/TCJPB2490608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621faccb2e94d14ee089264e109a141e49bf9435283b3007c0704b7c8531819. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:54Z), 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/TCJPC2411719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d679f2d218483a64b45bf598367fcc6ac98beadcd40801d05bef6da9e32e3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:44Z), 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/TCJPC2411720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3028e119220be7ec7dfeec6da652f7097ce48fc3e5b51324b2d7325b65aa5f5. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:46:19Z), 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/TCJPC2411721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9037f623961d5bcd0895aa5348dd9e39653c0bbc01b13b3fac7fa09746bdf4eb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:30Z), 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/TCJPD2576774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aca727b2643d0beaf157dad3ec4f4bad20aa406b9c0ca381a5ece30b49a9c5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCJPD2576784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8561bbc8103f9ef2c65602393522def38f55feebf394e14a8c9b041f3ab4c2c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPG2522967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9c8d6f899c3d90c59742bfbda6e4160890334a0977317662f7569ea6c43366. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPH2540574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6a501257dc8270ade9fb23c7f388ed128552368f52a52598c4d6ab113fb72e. 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/TCJPI2504879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ee605c432be857c240263c2527ca0e653325fce385be222c370753309a3d97. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPI2505057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c166d439e1f4d51d3a8cfad206d8f9304ade148a52570f8094c512957c5ae2e. 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/TCJPI2505144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13037dca263ca9cca87433fc24c9c7f23ef6820fc52f573858ce80d48cd0de37. 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/TCJPI2505246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e066fb257f24b05c0794fc9977a60e2ccac60612ed7183f54a6b8f771c44f8b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPI2505361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1a46ed10c5d3211254b069cf4336824c79a7c9aa00de628fa5cc6bfa8c88bf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPI2505430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475c9df8aa9a2db35229701f6ba7a8950a31b17db89dbee07fc5ecb13a05183. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCJPI2505659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbd9d8e896b503b3033f93cad25b135d6a73aa57a8a069d8fde309d761e03c. 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/TCJPI2505666.