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 0x454c1013246811dffb170271a84ea402982f9ef25fe6884132688cc955f61d6b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bdc4fb0-9b43-4bb5-83f2-4a7f80ae8720.json and https://artists.proofprofile.net/proofs/artist/9bdc4fb0-9b43-4bb5-83f2-4a7f80ae8720.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 0xfa4e44a35df4976f373c5b130277557e4f35cee010b752a82362973d04da3747. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ2ZY2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a98fe8e8ce3cc2fa55cd3fad5e05b811b5a01f38bb6e4ddbd0590f7944b5eb. 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/QZ2ZY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298547108151faf3805399a016b48675cc698e75fabec8f24e3492e96d2a6d1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZ2ZY2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef12ef7ed1087abba6f04917357f3e3802ace4b67e36b2f5d1bbdc2b0e2409. 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/QZ2ZY2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b139b89591bed78a2597ff56fca1f57625449726b4a1806bcefd5d3d47f27a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ2ZY2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85f305d72ba1ad9ddb3973144f4370c24d9f9f2fb43d3cd7d5686bbc1bd3aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ2ZY2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c1ee110a145273f7bc6b6086c334f261c1e377c65485438660c99e24c5019. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZ2ZY2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f67b32429cf61d918f00cbfe61db84cd03f4971952123997f4aaf22bec3c23. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2ZY2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cce3a53cf6f7489601f0cdef4b49883c176b980c779d382c5d7869b0917c3d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ2ZY2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991e97a20e0be965018411bb3f89962cafb701b86692f6eed905e24d0b97d72d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2ZY2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8137c15172b9ac531047eb26b367bcda95085b83f6b89c217811ad03e7d05e47. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2ZY2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c5b3e1567cc9fd532a0893af8e9689a122381654d0bb63342a63aa61b31b88. 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/QZ2ZY2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc3e010180c5379fd9a5eb0e2d3af17e11f26258bff94fdecb6bdfcaef5430. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMLYB1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298547108151faf3805399a016b48675cc698e75fabec8f24e3492e96d2a6d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2ZY2200003.
Jam in the Van - Tim Bluhm & The Coffis Brothers (Live Session, Paso Robles, CA, 2021)