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 0xf830e3d478a6ff6a92cbac843910f1b419a88e56ead530c2c682951ef4ade1b1. 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/ddfeadb2-3dee-4478-ae32-7f5548b1ef6e.json and https://artists.proofprofile.net/proofs/artist/ddfeadb2-3dee-4478-ae32-7f5548b1ef6e.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 0xc6b4ab46fec2a1cf0ec878fcc091c4630e34a81c20b3e89fa7c573d2527706e3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX5MY2407928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1a781cd31d5b21042169acf77fd0937c43809a2b20c2603dd205ff4f21ea8d. 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/GX5MY2442667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027ab38d57f295504fd13e55cc556c385709beafa7c88d53cb9aab096fb8b7f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:32:09Z), 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/GX5MY2476159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96799bdfb90b2458cdf155bf77d970fa3e63ac15cec035f202790f109cb2286. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX5MY2490974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28328be189add900ddae0c29d4d919a23bc949dcf5e8ee0d9b1ffdf711ca40d6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:23Z), 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/GX5MY2405502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1382929449329e4f1f1bb847d0a98c51017e04aed815e8a57cf74998fbe638a6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX5MY2404677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc2f12e78773436dd41e70f2e0c18fc32e2b9a24515cede733af5637ef02936. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX5MY2442679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718b1f2a6e1606445e0982f0d22979212c243cf8698e47e83594bb6982cd0d2c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX5MY2437237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042387f65c43a5777279f4dc72e848234fb1b813ff5a43c5be2b5e9b9cb6d17a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX5MY2409341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebbcf9fc9caf1121c871f4f333c69984974886ef4b7259b3b1413365a586ccf. 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/GX5MY2451861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb708ef99aafc8c58b98d3f1896bf4a3de6100754d03149e03b302b1bd0a35. 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/GX5MY2469142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e4d39b63ecb0ed790fd4f76838e9bed7004ed25395072aac7767a65d3eddb1. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:35Z), 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/GX8LE2596416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd11d6447860f1adba790702189a14ff8d73b307fcd47a5a49757edb61af5ed. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX8LE2587345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab5461a2019b855e52f69334a6ef2d0af86d3b9784a4bdca3714ae3b81d5fd7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GX8LE2598509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50dd09a6bc82964651fac25f05299a6ff4979f689cac346b2abe7d05eb93900. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX8LE2585031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0df059d7998cedd939c01f9ade149547f25fbf2ca229e9c6ee84e92b0f0218b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX8LE2518052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1928c5634549ef286f1d39a86474f592020f1bea722a48324f1ab82792b0d54. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX8LE2540867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dde633cb7c2a08085311e45da1aaa6b9d927a568a8ff4c3f0f351b64dbfde1a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8LE2510622.