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 0xfa154a43ae101032caed86be459e95ba275aa9e90e792a582b33903ed65ec1c9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e83e88e-607a-491e-b2e0-3756109294f9.json and https://artists.proofprofile.net/proofs/artist/6e83e88e-607a-491e-b2e0-3756109294f9.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 0xd443a0e826785ef0d7851139561b467a66a7f6a0f880e950d8e890a92a4a706a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB32562184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ebec3e61c1315243ba1d71d5a8604f2829d4d904942db86a21cddc8bc1a192. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB32562185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672de2d2b22f5a123f041c69e3b27479718e9d3701f9df735d874076db3e4968. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB32562186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd86a459b52a9482dfae2ecdc1458535dd0b264275ce66ae4cec733db64d4f4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB32562187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c97cc8c130a52b5acec560683cdedb6cb075af0647c30aa8ece9925cb29b9b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:22Z), 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/QZTB32562188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0362298bff1b6a5e6fff4f8927b59af1ed4277cb7cc92700072e9630ad05a1. 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/QZTB32562189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0e8533eea12d18049e93686e7bc7aa2b80d44ed475bc5daa1e6608d9c41925. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB32562190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30454ee831cdb5dafff490471df5d2529a69d6dbf63fe5729f868e9cd2811c4. 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/QZTB32562191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aca313a3a03ae31ed3e16863f49437f3dd987721265185f8ce19f5edb9185f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB32562192.