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 0xd9ef9a69c86067f69abb10eb2dd1f6f889755afdbb2816247c3a66f3b0a1895a. 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/95bb8611-92f1-4a6a-9fb6-e1bfc1b7111f.json and https://artists.proofprofile.net/proofs/artist/95bb8611-92f1-4a6a-9fb6-e1bfc1b7111f.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 0x9148a9553a842d43666d5d200067463e885c4f9dfaaf04fc0435d6528d158293. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNC2189765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf23abba5e74d1117bd341ae7bee9d9828d4bd029749c2362ae5e64a7236de8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN32260036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac812f7b6f2e4b5a1e7ded0085fb8b6b0cdc11056ea3d37cd3c44e0e8a8cefe. 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/QZHN32260037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d4965f0dfd797e8d81d887e7e6d05bd3f67cb2d0dde73628f2909a1ffdf4d5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZRP42260120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd7b75324683bf20f395201a3897585103d88c6fee89f27c98344d37a6752ea. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTAY2204858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5018d15bbceb66b7aa35eb860442bf1cddef94a251c4d12f4f64fd2cf8f1a2b4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:49:45Z), 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/QZTB72271574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8475d4982dddecc9df2ad95ca8cba1a65ae5ab4cc9910bdb483736466c31c90. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42372244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0783241cc9341fbf86fbabfd1a94f2bf052d50d330623bc8d90a72023a04cb3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72333654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265a1d1b3b07da946e589370ddf4153b5fbf485e67b1fb36184766890477124. 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/QZHN92358804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2da94e4a10d3278f0d1fb4d107d8e22b6e06236f9ed21d67688d617d8d26c4. 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/QZK6H2360697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7b8237f857636c797d6db2d0fa8b4e6d7e5d95c5851e1c9f8d5ab8df4ef7ba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2340948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd26441315792c1f64377f29d92f1a5906c1b374096ca6bec716c1de35a96a30. 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/QZPLR2314910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43830ce5b6fd64f1b920e8c02a89989c3c07de092cd62448cc9de7a78ffaf1fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAS2321759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03877915bdcacd00d53d53e37bee4911db5790ab0314729b83b772d13806f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAW2367714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dc0793126e078b0f9c2509ccd2574003897d51378b7278bab64d9e80249d50. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:18Z), 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/QZWFG2301256.