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 0xc1946abbe504c6299483ddd4586475273e7efb1142b6abf740af59556619f8cc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed82c959-6b54-4339-943b-3e0254fd94df.json and https://artists.proofprofile.net/proofs/artist/ed82c959-6b54-4339-943b-3e0254fd94df.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 0xa4f668f84e84ea32143be405097074f76ba996436c48ff806f18f140020ef97a. 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/QM6MZ2328144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da235567d1cf31fbed33c32663254c2385146166005f7d1a34334c70677ab6d. 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/USDY41828855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9239045d3bfc0d41bc98e31384ef58cb482ca5625cd2458b7ad95a0be6b29f. 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/USDY41828873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260542c89da884c6cad47a5742f941f3b48f22a1e464f8954ebbfb425e5fc099. 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/CACWV1967750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627eb3ad359b7222e91f0d289caf6ded1e971c4bb13ce8a883a001e1de475fe3. 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/CACWV1967752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdfbcf928ebf054e06fdac5e31fddd9142cb0f60d3d025e0bc1373e0d84670d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CACWV1967755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf691f8fca6accc3ab5e804e4e746387972db14dd6fe7eeb54f88540c05ad330a. 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/CACWV1967830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f668f84e84ea32143be405097074f76ba996436c48ff806f18f140020ef97a. 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/QM6MZ2328144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f18233bfb44733a0c6556a08a63188b40b00d967ea3c678a5bcf1fbe5bb00b. 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/QMDA62283343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc1e828c376a710c5b251198aae2e78f117f4c31664374f528a7129977e3d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAUM82200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113fc145e507748bb4f6044c0563b9fcd0e4a6427b3b594571c6201c7e0b43c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2294761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184131a8c9582f8b617669b241c068634daa2265aa8f068250b0f829766332b1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL2171146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa060ee4cfcff0268356d527563585d50f60dc71c8188cd6edd6b22e6dc136. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2160404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0999d42cd25901842f3781454722ee0abed31509350b069a0aa0d0e4b62e3376. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2154715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403331e1dac3df843edf610132bc7140b3c61341432632b6e2d416a4756b3f32. 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/USHM81689865.