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 0xd34d97dde8592ebdecd1a4929dc6e2012cf83b1be58d683040ba1aab8e03fb22. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8cba412-4497-46bf-811b-0bb6b4eec7b6.json and https://artists.proofprofile.net/proofs/artist/f8cba412-4497-46bf-811b-0bb6b4eec7b6.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 0xad5a9c9c7c04540438d7a6c3e55054495318c6ea9a33641cf794ef68826befee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA82252751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207f2777a9ab6f5a952c537ecc138f98d83e95ac341610dc3ba6abfff34db96e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFYY2423129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046af1e2290cd53d2beaa0fd866878ef230d0b0df38f4eee0e5f0812a41ce1c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ72475809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee48481baaceb54fed5f552f400e9c608ea77ac2d622813747e2da5a81a4760. 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/QZK6F2427015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bac0a085f954f0731957b2b97a56270fae414dfbdcf01a1e27c5aacd551634. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USANG2475996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b1695a61f16b6f5a8f3d4557aa32bb330371f8f521172b284072f848071009. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USANG2498628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8186b6b2995bcf7c916c36a40af7804ef83df4a48c0c8418159104148e27ad91. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USANG2492735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a1c4c7b138477eb9bfe953220028145b0983f0838cc256623b568facb8f6b6. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZFZ22506948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde588b10714be30aaabd14e3ac4d001d1d1bae6a730db0b5f9237ee8672d7e07. 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/QZHN62530450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afaec743d174e2e1a17ed80db16b6b60a16b884f7d0944c1da7961d75e7ff51. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:36Z), 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/US3DF2568625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1825831db5e93ccca76752386940126ed40b9c6786612835db71f9a0d4a950b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2458965.