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 0x24b398190eb5c3a12a818b8bb26d9e737dfd489f6f3dc9b4c87a685e9508c104. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21bb14be-2d09-4f06-a68f-7c3e87f9e6ea.json and https://artists.proofprofile.net/proofs/artist/21bb14be-2d09-4f06-a68f-7c3e87f9e6ea.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 0xb64ba4e57cb87af842709763108048b285c2df5fb6157f4e9f2a81644ec3b41d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:22Z), 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/CAQ8S1622477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001dc9712032362a33e75905b1140bfcfdfb09488978bd519ea509bf919f1daa. 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/CAQ8S1620215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808721bf8c13b124afef6e5ab9e5190509c47cc197ba7271c39bc473eddbc22c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CAQ8S1620201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445f262ba6bebcb65758bef5a2a2558f19d994c3f8ff89d76ddc308c4dc85ba5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:49:05Z), 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/CAQ8S1624395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7721d2fece6072af74fcb28cea7bab8420626b7aabc72920a33bf34ddf289aaf. 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/CAQ8S1624396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a7c86d6d8d09f7b202a2107fcf7ee3b0bb59941c687b10c39386576355d7a. 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/CAQ8S1624398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e420201caaa17d38b3a03d50f4e2f5604f6859cc20e5c997056c9b621b52e20. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:20Z), 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/CAQ8S1624468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc569963fa864dc128e40931f84934285725bf163b1ad10e8544a330ebfc3a2c7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CAQ8S1617883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7c9d55e8b572cdc7288b47dce2ca46d8513220d71b1c451fd7a61c5fd0e7e1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAQ8S1624472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae126189225600ca9b9ffe291ba42acf7d1350f26cb87a691f9da6eba94ecc4. 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/CAQ8S1624474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a39719b314da7b81fd56c50c52733d6854044beaf6a91be083f0544bc9b4c9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:43Z), 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/CAQ8S1617868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6916559474ac289becbc177eb6f8e6742040937f456e460517987aaefb98109e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CAQ8S1624475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157073e99ca11d117095fedf5c89c3b41d50cdd893e5089906065943b1c70589. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAQ8S1617852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda08e30102020e929d4d2d8b174bd98afd8e57fa36ed9f2852ed0e07166e55c3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:00Z), 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/CAQ8S1624481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547758a57104703ae1c7d1925c82a2475fe86576e71e906b5710c1761808a22. 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/CAQ8S1617892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1407ce320f321d9b2b1214779e88d96f431bb8c88d8eff071837bab9d9673f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAQ8S1617851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01977fd1440aa84594de3b1ca05269bf3250938b1b1b43d52770c3f19045bcd6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAQ8S1617885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9d147a8b8714c6979028b307125b7c4349e065cf613860f1d32b9ba4e1f5ca. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CAQ8S1624486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390ead09b12c26ec7078a5d1bf5e957bf1542c5eb6f73cb366fa3446fd60027a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAQ8S1617879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb0fef511a60b7028863f2d3deca8861d4be9479e82f835cb1578b58997a5ff. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:05Z), 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/CAQ8S1617846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeb7bce77b10832cf74c15d896ab7b83b92eab9a8a82e790873aa1e5f2ff413. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CAQ8S1618610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e2051f0fda48e006bdbad1d50b0cc915d51580a25f13328c84a050777c74da. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAQ8S1618605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6706e9427864b6b98a6b148dab971d4de06a1d231fb3e7cd5757af1861de2d6f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:46Z), 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/CAQ8S1617873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bbdb11ec5753c935915f36abbe10e5687909c07cc3d203b34cf28f445e549e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/CAQ8S1617838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155d9804e87c5a39c0ac92d753538a14d67eff007b41a84a51af827f47d4feff. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CAQ8S1624501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7eb8e8caeb5def57f8a7cfe088cdf95f479c0ea1a30072c60f663638a88d9d. 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/CAQ8S1624504.