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 0x0da4d3db76e5dc8fed468a48e2e9fc34f5104a30296a622baa41f82b80571cc4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ff0df6b-2fcc-4fee-a959-670bbb5c1e77.json and https://artists.proofprofile.net/proofs/artist/5ff0df6b-2fcc-4fee-a959-670bbb5c1e77.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 0x6005ccc16d561a04dba5223f183493b44954bdfd3c8d273e456409f1338c0235. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW272200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6746ba4abe261fc2773bc6b019ffbc712d27f7abc81571b39111edb9c38600ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW272200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941ae3ceb29feaa7ec23b6a8eb8be8ae2b46b4be566edfcb914a6ad1dd6238bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INW272200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20b334c6832e6c50ce5f5b8e85464fb38530d33e3989830b83198ee64b30442. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW272200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996c1b40e993b670d2fb4ed44f179c3d2e942d0a4de8b4313941776261ed8242. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW272200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f75370f29831ccb136b3e472538e9d9d6a8a343ffcfbe86568078feae28cd46. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW272200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0af23dd4cc4c1fa0edbc01b646c5cc74c90a4be2e4c1cb3571f8cf181372a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW272200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b968caa4e73b13231c2bf12b9fe55745aa3004fd1542a5a4c85769833ca41a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INW272200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644594a6c018200372a2dd6799cc902da5e90a8f786c17641d8088309807aefc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW262318579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33a22d062a4ed54db4a6ea3cf9bdf9dfd736bcbec7c05cc57bc2a5cdfbd8064. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ING642203414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab9fdd0c32f666daec4e3f92a4aae0d2d5dfe823d95103a3adea6499ebed934. 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/INS182300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338413ee958900f6ed973b0de283046d6ea7afbb6309893b3b7041012b89628b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2454307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdcad2428ae178764f7d99441db6527a77b5aa2eea5eac86fc7af44c481e81c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7536f167397808dd93ac66f361ec41ab124c172c813bb5d46171c31c7f16e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INUM72100091.