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 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 0xaed57c6836766966904b15c4b286b9366b288b7434e21a67d922edead3764360. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58a8a30a-2e04-4876-888a-90921df81607.json and https://artists.proofprofile.net/proofs/artist/58a8a30a-2e04-4876-888a-90921df81607.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thriller Keef Sosa Trem Underground Tape, Vol. 2
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 0x34e50f374640d6e3042921f43c3e2a8e884d106847ee24c48ac255eab7086bf6. 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/QZW9N2223918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c89a59e8967dd1796e84ade58a9924e2be01ef29b01c8709b38f3673bbab2c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZW9N2223919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6d9b3aa319547e8bd9934a531b3840e3a543481615610cd1115e02d212a915. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZW9N2223920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db691869e286585b600e99361272d1ffb62fab4ca4ea1707ec50ba362731340. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZW9N2223921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb522ca7f68e18dad08f49f234e95db83cfe354804fb9f266f300949bea01e4c9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZW9N2223922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bcd9230972f96e749f280f501415742edfc5e3169dd410b9a82dfc507d1274. 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/QZW9N2223923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c0d4dff79a3da01a1ec476833d8f8bb49e19c3da35f51b485d6c992e3eaf4f. 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/QZW9N2223925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea8adb7d42843339c039e3b76b82d915fa490d774db9ac77e9d62230fd8994. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZW9N2223926.
Thriller Keef Sosa Trem Underground Tape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf547b901063d18294744db4fdedd4309a007d6514e0a9f6012dd7d3ec1f4ad2d. 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/QZW9L2217738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1932146a0aaaa47c25a73facd33697b5d3858b89df6efc7587dc42d297bb93a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZW9L2217739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f4eb0198f49b85b6494ad49b0c4939f4bb9f34551c0d7fdcfd5e4062926cd8. 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/QZW9L2217740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d55146e1369f11107b05691bcafe807e1051ce4dca79c5207576c67f4cc41f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZW9L2217741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73bde222b512d452222620af8862d78e6eecc198e1b0b9a0e06a2016de85e80. 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/QZW9L2217742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b7eaef94163d941908bbce7d32ea817339a545a5f1ed361dc50815b67438d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2217743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a7e8ec24e0996aa46eaee24f849dfb3a9d0f7d3898471d7eebdd41f9b4271d. 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/QZW9L2217744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fbed4b0a07696ddc6a7da3ee7c44767e1bda5ce38ecb1bc16e67a06deca78c. 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/QZGLM2313621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa710976fbb46d92d6db615df37b106e133746bb7aefe04e7bbc99b56d97af6ce. 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/QZGLM2313624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f287c6220b9f6887196d70eb8c9a5665c0991938283b38011ebe04c8641858. 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/QZGLM2313625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d948694a98da910a60628e8dfa7adda7e2e4368a95175b0032f80893f8889. 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/QZ5AB2369180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60301901d59f284fcf59704ebfab423da54b5200f61c9efe8bd3edf81fea0ab5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZW9K2297933.