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 0x37b60846e235c9246c9c42dca6ec7f6a1320b5c5a382355cf40da585ac126fad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d55d440-5ca4-46b1-8261-960a9c724a75.json and https://artists.proofprofile.net/proofs/artist/2d55d440-5ca4-46b1-8261-960a9c724a75.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 0x604549e1e5b89e51076dd7392af862ed50f315505ac53548e17c02a03d2f932e. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:28Z), 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/QZHN52114897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb695a73ee52c522246fb6412a524e2523625e49679b3e11aeb6325cd2b0bd391. 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/QZES92269517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a5ddaa899615b113315a809955114fe71fdea0ccf0d9fa25b8ed174a1d3763. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZRP52214544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d9bae2702442ebfbf4f91d85cb50b121eef9094d0df96c725a0967725509de. 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/QZHNC2352795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53defdf2eab7be5836da9c4b074881e7b2fea6341190139d6ae33ad61f38b4c4. 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/QZK6F2306534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d6ca95ee927d9a95bc74d8246a3d37d196332a73658f69b35187d10d68c4a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6F2428185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76292abb65bb3a624efc8a98c36a9e2a765b2d47ff664756e754e1d5a8c6bd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN62515347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b21927cfe504c08a698b5713dde127a320630989e13bbb48d532eec4e22e3f1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA2548429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76292abb65bb3a624efc8a98c36a9e2a765b2d47ff664756e754e1d5a8c6bd. 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/QZHN62515347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceedbc9cfd522a35b8e14db2c6ae2fec163b5d8b1af68345927bf0b40526f37. 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/QZHNA2548430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2993cc93b243da1c2894769583c5b57c695a665fb54637696cd35ed9dedc7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHNA2548431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd34f97b9b8551151584a5f199d83decc65fc6b1eddb62fba27a58baa077b95. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:58Z), 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/QZHNA2548432.