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 0x0af54954dda31d77d0eb0785b712adec9424212fd56f55f1a5d1db999f6eb1d4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15333aeb-95ce-4192-a602-61e2579a95dd.json and https://artists.proofprofile.net/proofs/artist/15333aeb-95ce-4192-a602-61e2579a95dd.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 0x740d56bc53fde99adac028a8589b7b64f7a3255960530108ca37f33bfb253906. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed409e450290f8db93e87c582af4a3151e8c8eb7ea1b016230707c91b942e854. 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/QZZ7T2504758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59065a2bca4eca9604a8a411a3fc53bbcbd3c2bac062c8aca37347307580e6cf. 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/QZZ7T2504759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea628b474d2fbfea68016b981269dd2439e823d6f08ecf2404793c95bf0c19d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad26ea6c6e4b5855906b758f2f71b124493c22f6213bc5355703c44ed2cab5f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222e24c39a0dc4aa2b0e05ae7679551bc7b16b6f6a03d33d896bbd1c68bcf511. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181e3eff988e166c0505280c3848f9cb69e9d4e43fbf6698cb01c634ca978a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb219931fd74d395b1142ddadeefba8b4bef8f8d02b7be2d2a852ce1b4fb12a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8505588320a9218290d0116df2dfce8e1f905b3f1faffb6c92b96d058ceabc0d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2504773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e08fe7c2b2073c4bd5c91bdebde6df7161d22c92e698050cb5e3ba3941592d. 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/QZZ7U2501048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aa6a595ecd5e06c740cf7a1a0af87fa199dcb899a7a781143db32f34ff2a77. 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/QZZ7U2501051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9f2a2587b5b3f22d474e0c581806e8a61bc7509db93026d9d2bc3700e07488. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7U2501057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae6ffe3aa4bfc1376f03c5ba0e100bc20f289a67ca2e6e8c0fcc63728b3a80b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7U2501058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1728a193d3657e91cf366ac7655a15cd17052f80af2c5bb5ba88d7f4bb6a7b. 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/QZZ7U2501061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376ef2648f1aff79447757338f1c7a6d87f420290f1d627e24457299d288ffbc. 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/QZZ7U2501062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaebf81a023a74fd853b359c9dc627a6974d3b8f7c2fb190cc6ccb83fa01dd0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7U2501063.