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 0x32d293477745297283b6ff4d9b8a5c57490725cbe62089a4bd0a533189bd82b5. 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/39ec9b3b-3221-4aad-aeee-979cb816a61e.json and https://artists.proofprofile.net/proofs/artist/39ec9b3b-3221-4aad-aeee-979cb816a61e.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 0xb4ddb1c6d0547b1b9a324be4b2b09deef529c489dd02045e2146fca6302bf100. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZK6N2179673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac82c6a62cb90a06452a10a94605ecd2c7dd8e475efc017de88d272bd35f8b2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:27Z), 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/CHF032200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b274273ecae36f61006dab87fb7afcd7565fc9ddadfa865d34fd2adb5d7ae39. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:01:46Z), 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/QZMHK2262788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587f302bf18cd4459dc0b2353c4a27f8c177a0f5d902ad225fcb535656de34b7. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/DGA082287510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d940051d61ba58b4d733310546da64c4b5fdcff9739b3b3726dbbb5727cd810. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CHF032403108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8536d90d26fd40935fe2a7f7a5c2c6f687e3fe3e749b7195588d6490e73a4ed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CHF032407980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea87d4a4bb760615bd259d9bbac551ec0862f939f97186837f9e60ffafd2b3e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CHF032415493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aca23c807ec4afb2426b54d6757ddbe5410f8b7995215be0437edd48e5722e. 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/CHF032405309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c561ab8c55099744df03f2cf505953f28318ea0e21b75a8a640f0fd8e38b4d2. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/CHF032405314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6900e794c00c315b87456514fb9242881cee69bc49f7327ce1c3251fb9cf63c2. 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/CHF032406550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aca23c807ec4afb2426b54d6757ddbe5410f8b7995215be0437edd48e5722e. 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/CHF032405309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ed0c188ed35e295831935f166bf037790c671c284588c78f15330cf0eb39a. 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/CHF032350649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93940d8cdfa14688b52e0c38c3e8c159abec6f1fe2dd04923c8d3162d12474ef. 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/IND292218650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770ebc290fc472f66a04e2dcb56d77cac78ed5fed02db3523941a953d3953eb1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CHF032406695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae24838eb69f3f91368ae8f53132fa73cf2935aef84e5f3053e55bf3fa5143. 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/CHF032260327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae24838eb69f3f91368ae8f53132fa73cf2935aef84e5f3053e55bf3fa5143. 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/CHF032260327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbae0a87f55bbca23e35228c118dda32174176a4856fd1000cf03cc71ad3c76. 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/CHF032405308.
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 0x195d59c61c3dcda7bb641f330b70dd06b555eb83601579767aa93cdbb087e2bf. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CHF032405310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a487f425e1a824172b05add3c7f00581441f236d757fcaf72f1a171de8cad. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CHF032405312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d8dc225df361a2d592c44daf023e0b01f5b07eaef6afaef02100bcb2d7510. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CHF032405313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef4e9eef940e8357ae75361d08493b7e4eaa6e02ba89d9925d37cd71a53c28f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZK6M2330077.