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 0x27e5c28b8f1eb70534d4eed2f5a6be3bc3a15ec7b2bebde3a44e254d8452854e. 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/db039567-5642-4320-a22b-8ce709c49b24.json and https://artists.proofprofile.net/proofs/artist/db039567-5642-4320-a22b-8ce709c49b24.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 0x8912ce3d094ee4a098ddbece705ba09cc567637b4ef2f240e8d7762921cb45e9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTAT2248076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d9e26eb367c394651d31e9257c9bd000d616a9756434d46e16e4c06dd508ce. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:45Z), 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/QZFZ62356752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3b3c53318f21b314f7f4d3b9459852a403b83dd396d2d050b95153050bc07b. 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/QZDA52393009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68208b91f25821678d3d5613948d527039642f18222901264ee70e71c2bcaf8e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZK6G2421691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7761cb969d9b6011594f32ee3cf7fe17ab491772b295dfa9f53695c74ce9233. 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/QZK6G2421692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dd435630cdbcf8585390a8644d69b74b2655f80ada40bcc6cd4c593f3df9bc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6G2421693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728c4977c291a45113df83dd989efb5ce5251455b81046bb6d71ad93e6443c47. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6G2421695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0549af62ff04a1e7430042a966f07e06b781b60ce0edc16d00bb502adf948e1e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZK6G2421696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160be099186f25e5f71c2d4361c84e0af50589d525a50485103890aa7d6f1a32. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6G2421697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fe8586d24cbac8642b1c650691af419b32b1546d0333bc140c8b77aab1bcec. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:51Z), 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/QT3F42425018.