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 0xa0bd913dd7fff53f0407d198d26cf3190bfb06dee697b380333a88efa78db371. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70a6270f-29cd-4584-ada0-dfc17fae5fc7.json and https://artists.proofprofile.net/proofs/artist/70a6270f-29cd-4584-ada0-dfc17fae5fc7.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 0x584cd12c2089c0e25764a27f88c2672afcf952c643ef4ee95fc2a2885345cd56. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:16Z), 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/QZGLM2326697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c8f9717068a94a553d31b0925220d6602309d7bdc5f436c949d4c6d63092a8. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZMZ92353278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959f2b182fba66b3110b8ae5da4c52bddcadebbf74ee02362dc9423af0e7e67d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZMZ92351746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da9352be9276fcfd6f3d66c0e6a567541620c535abfc44fe3f0e6a6ba41e914. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMZ92351846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370cd66b6a9f5427389485304ebf8e3b204c1633114a13d924398c2f037ce204. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJX2357498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d650703cbb629b95506438d83cf10397d3f482378eab78a8bb211dd313a08d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNJX2363435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4960c6ad61d248e651d484fe3c6f626f4e3e87e2f779cb1fd3321f8041e122bc. 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/QZNJX2381345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24612b160f4899b4a9c5a97b9f8ea0e699b0b8c9add92ccd5b54f80406b91fb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:38Z), 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/QZW9L2330637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6a1e3b484e09f9dfd1a48433bfe64bb295cc3fab188018af3aea97010abfc8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZW9L2397183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e115f4534ceb16a2dbaef630b6e083c0d7878d46d9d433e529b5e3656cbeda8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US7VG2430189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21bff810b5749c1700357a23151a2403b0b48cd7f429e1d36394f10fdd6e974. 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/US7VG2430417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10204796b4071fc68cc910db057f5bbe336e8b26ce4070f0a41c4e394f5548b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9M2463528.