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 0xf27d5dbde8f432f245d0210b1130447a9cbb2c8418754f69c2f233d4ddd0f445. 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/a210c87c-7579-4421-a240-d5187772de5f.json and https://artists.proofprofile.net/proofs/artist/a210c87c-7579-4421-a240-d5187772de5f.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 0x40ef4a0d353db66c75e63de1afa3d03c90e30fb821fa5e1e5664a41e17f4872f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:02:32Z), 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/TCAJH2569524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3762e764f966ea129a1855fd4e999b199ab1782abfe192818c273eec27ce28. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:00Z), 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/TCAJH2569534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d92e7552028c08f9ce9071f263c31c60c79e704a3d22698985b94b1c516cd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJI2569560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d9b2db0021893e1128c4a51d95ba732f6f2e52e7a152600550992752eea11. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAJH2569565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2753bbee1607453635f9cc3837c493f1417037aeee8201d85d3986d72e67e317. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2569568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde39b238a4d547002b27c95205166a875b963db4f1365c028a9a239895360b9a. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:36:23Z), 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/TCAJH2569577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1643fa9078f3dad34331a37acaf46ca5dcb3c0357304300feb05c0b1e33dbc74. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAJH2569583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c5aefd260fd10b8bea8d1b976be421630ed66886980242dc4a33d992dfc041. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJG2582538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee0f07dae2c6c362ec3f2ea9a57d5507052dca28be85d1dfa45c0fd4260913f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJG2582552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6412c8a217eec2cf1d47d737c0e3e41aeb69b9e23d71d8876960a1dac8fc81e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:22Z), 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/TCAJH2575927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7db25516b46b555fbe0740b8f0de7e3e16dce26e45293c96dade68b090e020. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:42Z), 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/TCAJH2575936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2756a72aafb3772cac3dc505a4cb51f236474ac9cd3248adeea2dc78e1f04. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2575988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba4a64b360154502a0ddc8f34f84cd03e5e6742527ebdd8a111298f947d5f82. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:08:55Z), 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/TCAJH2575995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d247fb3543cfc678ad0ac95f29b048419fa277fcfb8c132835244bccc727a07. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAJH2576016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a98259e3f134b86cda51dd40784c61069476953cab3ce950bdcb779b5243e0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2576026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f46cefd5940f2cbc0bf21f69bf9d1253a983dffc76d1ce9d1c2eb2d2ebdbc2. 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/SE5IB2306527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341807e32530c561d060dd9ca0907d9487ad48a370029bbda6f10294d40793e4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/SE5IB2323987.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350c36e0725e6300ae73425b60b5b6936c80386f91652735b0c8decb88ae323f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/SE5IB2261105.