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 0xe9012e2bac068735e502933354888a1de20e6fcd383acfa62a63a4c80ae26596. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4ac308a-06ae-4d6e-ae41-47405adbc7c5.json and https://artists.proofprofile.net/proofs/artist/f4ac308a-06ae-4d6e-ae41-47405adbc7c5.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 0xccdbca798bd5bbbf029f9af3fccf618b44b18ba680e2aa5b48c7b80171f4a6b3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USLZJ2465299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a16a0b713d0e68729ccce349728c36a36b828f1a66862104f03fae32ba19c23. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USLZJ2465300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e6da8587f1a0e785c2555b9f97eb776fb6b296426cb0e53959e81031ad7174. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLZJ2465301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a523fca4c1ecab9dd26f1cea49d8a1a08c5fc8aba926e150825d4f136e5fbb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:34Z), 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/USLZJ2465302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7fc2ba1e32b3999f0837a6fd05d675ab0b1a236dbad35e538fd5c67883cf1d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:32Z), 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/USLZJ2465303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a16a0b713d0e68729ccce349728c36a36b828f1a66862104f03fae32ba19c23. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USLZJ2465300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e6da8587f1a0e785c2555b9f97eb776fb6b296426cb0e53959e81031ad7174. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:22:51Z), 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/USLZJ2465301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7fc2ba1e32b3999f0837a6fd05d675ab0b1a236dbad35e538fd5c67883cf1d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:44Z), 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/USLZJ2465303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3621950fb0d88139a9efd2927e446f6b02af1b8d5143a85587dd0406466e821f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:20Z), 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/USDY42500353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276d2a250e035f1b724da0d8526d7b69c4519c4f6469eced7c0d3b83d9be061. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM22541643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66152d0e33ef4da443fc1c1ded8d9703f35c56ff8ef1ad2a05c6da84495c69e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USHM22541645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8910adaa134093cac91d99749c5efa595343efe4ccf6a43b794630d011198. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USHM22541646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f9a23d45c7ecdced98550ff7140c880c70322c5925dc20d92330a67b3138a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM22541647.