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 0x306d97264d728037f6259d80ce40033f1e107f16d83ab88ae0a5d544b08b1b04. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46bc438e-3141-4802-b16f-42de703113ac.json and https://artists.proofprofile.net/proofs/artist/46bc438e-3141-4802-b16f-42de703113ac.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 0x8162411002751d260ee42182d968beb64082153ef3c6c08789167a07237a4d3e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEP2032885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb04cc5f1b7038ae4d3d708689e248af0ffe9a1d919d05c5e5dc50362e4e449. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWV2090546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee36c4de1b39fb8c84bfaec1b55df9af0dc737170fee0be53610944d212ba6a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHNB2183352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de55397f950d2c045ef364b62f6d5ed5a4199e6a24948f61175d9ff6e151be. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN62233998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999847955c107c709ddf398c3cf424a5c09d43bdbf3f8f29232cc9525de4f0ac. 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/QZK6Q2255768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d581d7f35983dcaf0ca9fe15082e593ab7b73f024b501a1cb0bebe0a9b93bc9. 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/QZMEM2278533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10535c553e180415fcd974dc19547dcedc1f1e061641c4641c73f53015e9494e. 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/QZTAU2262792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b9d7105b90024919bb70e8256095a8982d857028ca1e148b363b3fdbe8104. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZHN42305250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772d0d5ffb282977b47bf4771a09abdeed80cf17444519c1be9e701c6f042855. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6N2370249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6cf288ffa91f5fa0d96b1c599248c3ca520464df4d0ffa89330703a90cf295. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWU2323599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112e3125625865431513da365adff2bffe8aecb422af116356f02c608bac4fc4. 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/QZTB92346430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8652e6d354229fbe8d2aa4008aabded572c1620c1eda4df6ba0480bbb20ba73d. 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/QZK6H2420498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0d5f360f06501272eccdd393b53b9a845c69203228d727953ff24b72357b8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMER2495208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1daffb6e486679fc18bf3b7d75c80c3c0a1ea005d26a113674e10fd968e111. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:42Z), 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/QZMEN2595230.