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 0x76947be3a0ab46522d9220e40995d29eb6fba5060d85e58428158e9cd3a74725. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/602967ff-f104-4c07-8625-28a530af2558.json and https://artists.proofprofile.net/proofs/artist/602967ff-f104-4c07-8625-28a530af2558.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 0xf1076f1dd77ac436c75e4b90e3122bf4b5d29867f910233a686537178a94c5ca. 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/QZHN82567031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd255bf0a44005b2873cdc5ce4e4cc05a9f5ec7ef4dcdd640aacdef7d6af8026c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHN82567007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc7a7e4c14aaef6d681e0d44919b85259198e5824db9cfc6f6bb9746c631049. 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/QZHN82567012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd863831a1ff617c594b3ea523e6bb9408deb4cdfa883b62fad190f165f790de2. 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/QZHN82567015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536ade548a50d10ea8f08d9244388f17ed45d5e9a54a4eb9f4987c04fb930695. 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/QZHN82567026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8da3af6f8cbbc958a802aa42ad416b70dc02bfef69960e807f6127c2e05905. 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/QZHN82567018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d71e5046bc520e598b60bf636cd2c3230e26ffc10285c6cbd473b9e701edc. 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/QZHN82567016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17af8ab66d727d7e74a45dc840016df2a98887c23c63a87b44de1362a31ec4de. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82567014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172c565d5dc07573574bd7604795ce9385116c8e4756996e8eeb501679561119. 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/QZHN82567009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1f289fb2563dc912adad5a461cb7487d832731ae9c6ca4772c820c0ebb3f99. 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/QZHN82567021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c826239cc603e172dfbc53c62ebc8c73d6636381556f49ada25ac4806b499c4. 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/QZHN82567017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65206ef3f8d8ad9fee9f8a25bee9897bea0eac2bf32861d7a1a4ba089be0b07e. 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/QZHN82567025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa47c650b28d01c7a61421152558fdde660d93d098165848134cf5d925bb76a. 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/QZHN82566239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c986f7073ce674d72022a18f222888d842d4a12dba79b37c295b2ee14a9e761. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZHN82567024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8546a099ac786e35efd06127e4f16f53d1d0dda549195e54ee025d25d856c6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82567028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be49cad820f7583f0b2aa3725e74ac888d9b0616990dc38d463413e26d421d5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:48:58Z), 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/QZHN82567023.