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 0x121f12edd7766fe9694b25da4507573cc5a82058fda9a9ce83def0d62ddeef85. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d6c83f3-2180-4521-881f-6f83059910de.json and https://artists.proofprofile.net/proofs/artist/7d6c83f3-2180-4521-881f-6f83059910de.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 0x767b1b206be2327d23f6e21c42bdfd258771d2cee52518d3c9a51a61316f5c68. 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/USA2P1358527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde804fed39a53a513766d6f64c4bc8d1b1b43afda90cfb83600c8e61b4fdbcf5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:26Z), 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/USA2P1358530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee7c96af5c5b764974c2f1d6448558eb05bcea75a8c2bfd70d07561858f9655. 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/QMAAK1607374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214840383ba50d10feb22e4c3d13a52b9ecc5e4efdede0a0f264dc07301bf7d9. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:21:06Z), 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/QMAAK1607378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe7c6c79aef1b1642690b6c8e3a7ef1a14a91703ac030bb5095a687a5a704d. 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/QMAAK1607381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501f37c9b3d51d360fe813a207fd546ebd649b05a4704ad4a3d3ae7e2a1b09a7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMAAK1607382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28f7785c83d7dadb97ec3e38e4244cba8743a2896cabd57df89e31b778eb02. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USY251978519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3a55dbcfae768c8682a1ff4f29cb956d594b1801c1797014d6d43b4a1eeded. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USY251978525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b660e0836ec044e4216bac3c28cbfdf1335a1a3a81e62bcc053b29a3f0140a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USY251978529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa287131f0c5bfaa952d163ae91b8e03293249bb1e3baf292c75863c54515baad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USASD2000192.
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