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 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 0x677ac47fa349d1feffb618037a9ec168fc154f8362ad44890960537671a8b820. 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/a1376f29-527c-431d-8874-9fde46d77c0d.json and https://artists.proofprofile.net/proofs/artist/a1376f29-527c-431d-8874-9fde46d77c0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The New Hawaiian Band: Hawaii's Greatest Instrumentalists
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 0x3d91e2343b8f7d577a64dad5eca71976a0af60234bbd8111f5c0af453135c16d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USAER0710125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac0d69678d0c87b77604512e3c83a70f913ef3e72671223913fffb670b8656. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAER0710131.
Ke Kali Nei Au (The Hawaiian Wedding Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc66a8ca389d8ee8a6dc98b65bf54c38ff09256186ea8b14e208dae90a2b4ce. 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/USAER0710123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec150c68c5e2215e9cb67bb64157fd07eb6f7612bbbe08240df6d293189279. 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/USAER0710126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72b7d8881bc68077fc7405b5b8535bae4cac9ed41c205af9d476c6e9f1c07f5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USAER0710130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0975a42604a420336f1c91fe155831642457fe8972f1ca34a640957fefef8836. 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/USAER0710127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d96c79856142546a6781101ea7cdab9eedca0fa1b655444a31a733b2a7179f. 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/USAER0710132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685869600bca43eabd19b9725fa9627e8f110a1e0a87934738ac2a20769b7f14. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USAER0710133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6690cad58b774061caebd168d94ebbbeea884d1bb3a9b2a5ef91caa10b26b6ef. 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/USAER0710645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4758d703a1786c22cdecc9e3abf88682849b6f28dc568818b3f57c4f259360d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USAER0710646.