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 0x3e643f1eb660ae528ea6f1e347a3d8fe655388d5654d12caa06d16430a9bf0df. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52d0f3e6-e46d-4226-b847-be83ca6364e1.json and https://artists.proofprofile.net/proofs/artist/52d0f3e6-e46d-4226-b847-be83ca6364e1.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 0xcc0e435fff6a043916aa3f9c779244a226a766804926d6d54784a1023e6a2540. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/MXF369934717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c06322f8859cdc43b7789bea36c71b090f62e6389d63c979f4e457b55586ec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:28:47Z), 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/MXF369934718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f0df88bb25972fdd28a20c869b939e1b0aa1a4dca40f9700f78ea3256f2557. 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/MXF369934724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a5f9b95141df824a2e61394eff25285d483b479f89d8503d44e634d2c99ac. 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/MXF369934720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8960d69d87788e44fdee0c0efe9a3096c90f1b1713d6fb2af3e0c06124a74412. 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/MXF369934721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5000b7359756b0a04b29ccb3366d89530967999b83b2b6ae8a6823a1919d409. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/MXF360035113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a023dba32ffd8588cc17a1e0dc66b8f0dadfc938ae2402bb5f1edcf206977c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MXF360035108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bcc02d5c95c39bafc048a3e8fc6ab898ca80a945303d290ea010d42e0035b7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:34Z), 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/MXF360035114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52142e8bff7e74ca475f522618ed41fdfc6b98138ece8e9235769323cd328b4. 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/MXF360235709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfcf954e72513d49a0a6bec760fb5078902ea5e7995a0fffd963daa82d15394. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/MXF369834384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298c25a4494085583323bcf44aa43141e8bcac7b53034ea4412edc5075e8d466. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:06:47Z), 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/MXF369834383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503531792cd55984fea99cba5d9cca18e959ee0307deb42d065966d530e97bf8. 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/MXF369934719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239759711a976065bda028a5e8dbe11b374963084574980bfed194eaedfcae9b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXF369834387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc9f55dba2b989441817e408a45b19b62313eac0341659743ea1a70dc8bda2a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:31Z), 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/MXF369733915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34140c0821ae3f5cb98548dedc76f9237044de73a873a8abfb23927e28e22949. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MXF369834388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd711f61e530fcfb07b3b21e89f03657076c0b78bb8cef03c211bfa9938922e. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/MXF369834380.