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 0x5977858b3b411e2bd7643dbbccd99a44719839b4ef455a33c0235347986402fa. 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/ce128cd1-4e98-492a-99aa-6728e68cb542.json and https://artists.proofprofile.net/proofs/artist/ce128cd1-4e98-492a-99aa-6728e68cb542.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 0x8b1c752c09aef5962a1eae289b093a17dbcfcd77e9c57140c046deb7a14df4df. 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/QMAAK1806520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c355d29b053ddfa186bac037a798033fec0e17f36610a0c519271a7269fd0e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA62043379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc936a519a5a22074e8c43d4beccce5a58a2340108d7b49713c5b32f514c76cae. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:26Z), 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/QZES62062417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39958450cf5935d93f06be01cc85b9d3317d60ba0ab3a80dbbf3e5c6ca646d. 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/QZFZ72078872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c355d29b053ddfa186bac037a798033fec0e17f36610a0c519271a7269fd0e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA62043379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c24eb23945c121bdcbad5af0dbaf0050040da6dc1cc771875864937079ef8e9. 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/QZHN42018572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d6cf8feba9fc78337ef530acf5a9ba250d7cb863b74740c1c6da59d0f57457. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHN42018574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d59e8235f48ab256e0e1af987ba620e5e17b37386a3b13962696b514f331c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZHN42018575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515234c54f5a733bc25af9dfd01959b5a3586b970aaa1193f05a8259f0e41a5d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ42273180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab724efeb2793c9000056f55a6527b3e1879837098998ec048b0dd3e14630e5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN32254137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8c6c386fcd16bcc3db3ad8fcc585bbe46f0274ffedd57633f7d286a5a8c94c. 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/QZDA52231228.