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 0x492b7d1e57dbbf04cea11c067f699d1ffc1551513d24149bbb43e393dff7869f. 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/d66db505-4b53-460c-aa6d-9694771349f8.json and https://artists.proofprofile.net/proofs/artist/d66db505-4b53-460c-aa6d-9694771349f8.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 0x3caa997c7dcf015975d09c0584df620856ad6e46ed9e11dddd79022189b67a9c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:03Z), 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/FR9W11420494.
California Sun (feat. Johnny Rain) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e8ec72008698b294b24eed33df62abff82c1213259cfaedeef6f1df567069. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLE801800368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc2dd50ca7abffce9234b8edb367e991381e5aeaaf0de38de92039a6c13417. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:05:37Z), 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/NLE801900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf414cacad87cb028d96512d6e8191f61e257e7cf75c429c725bde6f83d7850a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLE801900730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81e11af7d680d559c0cfedb25dee214e1f1b6643f5704d0db2ab69da955059. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE802300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8c0759790b10d428fe00b9f5fd67c157c94fa0077a093b0ab417740f684ccf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:26Z), 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/NLE802400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681dfbcfc653372f1923e8d1252edc6ecbed66d7c161edf6b3c9d2686b8a2bbd. 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/NLE802400428.