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 0xae8420b2a451426faae608b00b0cb9a7dea77591fadf1fdb54681ff5b0744734. 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/8723db33-22f3-4d78-b695-d7e5bfb3646a.json and https://artists.proofprofile.net/proofs/artist/8723db33-22f3-4d78-b695-d7e5bfb3646a.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 0x5f94d1f0f0b7deef719ddfd25361634c27c79a35095f3e0ecef11179f2c559e1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ART581101570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab88191cffe06416cb6211c4c7b80e36946a27818f52ac1e0dc8df84dbdaaee0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:38Z), 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/ART581101571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81b46990cf68c3ae5198f9dcc0742b33d1db2466229361b390eefdbb3dea536. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ART581101573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeabc44690acb39cbd63c80dede5e769d78e6c79130cbb14a557d4998eda6e8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ART581101574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5589710bd5dee3e2ae5bfd64b771bd0f282e21f62409dc27ba55a12dffd5afb3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ART581101577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb21bb4852a8eed5dc99f06e14f2554e544de5d19c8b84abdb1f1698f9ce56df. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ART581101581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f159907873aaa712b826bee43d01e4618593645c2171ceb23f8394319db98f. 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/AR2TR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eff8750e2653bcbd02e36e08840ba355c82a40e201b7885290c3c9983ac4c7d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AR2TR2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552b774aeb21a2b4161d3536d279a909b87ac6deecb5bba07deeb4ee568ff7ea. 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/AR2TR2200010.