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 0x3337c1c61f79b1ab62e42e7b4dca6ce84fa32e90e12d3468cea8ab9967cd6b20. 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/86d8b383-f5dd-4a96-9308-b9943f9e41a5.json and https://artists.proofprofile.net/proofs/artist/86d8b383-f5dd-4a96-9308-b9943f9e41a5.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 0xa208a4444f4ca800534d04dc10b3e084df2d3372e59fe0908ed9c439d3cf31de. 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/USHM21516920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d6f49793a3eaa6d338a8f668cd2245d241d54767775ab3d49fb56f5eb18fee. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/USHM21516921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7672e364b6a21502d65f3b077bda3b95c1358cc97bdd060c8fff9e7769df2f45. 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/USHM21648636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09b1cc3a8057719a0b65b82fe928af3152d4dc784a398b7d44309253d758bdd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1723851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c688056aabe0f2f8aee07c0b72b27fd3c9bd2bd00e3f1ee3958356209a735dd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDY41775841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc14bf1686dbf5b58c39c6f89997abbd58151af886fc9978ba6ee69354cb49. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:42Z), 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/USDY41775845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460e5d3b5700c20d4ea23e81cd36b748ac1f31a630d0d33a7d101be169d222c9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41775847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2f5d0caf150779e5d97f5824fa353b4228e768a90bd441c14fe638df7fbb04. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USDY41775848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8300e9899e66a4681a39aa61e2baa564f0261aa0b4ce82b117390a64dbeae5c1. 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/MXD781902539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf276dcebdbbc0b59f62377d81d562354d278c48036054b62feb935f6307711e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/MXD781902540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861511a2c6aaec91c76d6f9b44c3f51f1230b2ce1fee1f0b95a91e73d30583b2. 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/MXD781903381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf304dd1ff0b255c341d83851728cf1c2fdceaf8217028a86f0ba2e41818410. 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/MXD782000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36fee389339b6a0f8d3c737a6fb6b8e3c25ef70f41d2d640ce5bf9f5e36b220. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MXD782000621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc104ec151622fd737d71ea63a988efc1ccf4c61402e9abcdb9551a2b61396dbb. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/MXD782000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ebad2162d14e3277af1ba63606b4d93634d48dfa5942bc40dfdc3e16228aeb. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/MXD782400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac523236cbf0879770bebeded783889d6929dc9944ba5b9e67b9770055ec4171. 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/MXD782401121.