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 0xb0d73ae0c1edb4a2582479f7bc27a98eeff5dbab0ecd8add1d549a32f7b48e36. 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/8c9cf25e-53d2-4053-bd34-49c0920415f8.json and https://artists.proofprofile.net/proofs/artist/8c9cf25e-53d2-4053-bd34-49c0920415f8.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 0x56cd9b73f028a841397f195ef99e2b0e48c12611d7ab7ee9d0db196aacf97eec. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHM2027983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08fdb10d9eeb6e1e90e6856b9fd9ea338eb02edc262b66d44de5a5b577f1218. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM42K2164199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf2353cf4bd0127f3681e10c6fed93710346f82477e1e5f630f9d9ef3b30b0. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:44Z), 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/QZKDK2199477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf8832e50e19313f427a50fbfe728553afea963b0b01a18995f57e56067df5d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZS672174200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e308519befc703f054031e8c536ba4d71a7dc4cdafccbc91035a6a4774dd497. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMHN2003823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9bfc669ab97853393d6664797eac8ae9583afcd3a8a07e97bf2b0ce1ce582d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZS652384331.
Chettonsford Quarry, 1953 Soundtrack Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29046f03df4bfbd7b77b29444161d5bf5ea37a19bd83589c109df240216f1ad. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZMHM2414668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8cd900c27e27dc54207cc157b9a14e94a60a1ff8960d1f4d67bb36fd3dace0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMHN2496072.