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 0x342e7e98afe6cfa343015fa86f3d54aa6a47650f4f1ae114f24edb4461dcad1d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f80b176-8500-463f-a666-ba9bf314f6e8.json and https://artists.proofprofile.net/proofs/artist/4f80b176-8500-463f-a666-ba9bf314f6e8.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 0xe097c37410be79fc3a061c5de318b0ba60ab07b91eaf5fa04a5375b98baa8ec1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWY2499411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b262a3cc66672f84a20ec7360fd5c12aa1e110a82fa7bf1e9e06499d6ea7fc9. 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/QZNWZ2438698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2915ae4da90248512aa89f5ae50a87a6064638c07becbb2390020317d8127c64. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:47Z), 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/BEX262506101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a83cde77ef5e95087fc6bb734ae45198a46ca330a4453d4a656b2e22e3311. 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/BEX262506102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d8c3ae9c25f3ce26aa635113d181d57f18d6bed2614be02dca7f78adc22dc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:14:59Z), 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/BEX262506103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d62ea55ead9c4534145909f1adcb94cac7209dba56128c690b3a45572482d18. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BEX262506104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629ddbd7e5fb269bc1cb1e7a58a36fdf3a134b305e3db12bb9e86ed1046f3646. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BEX262506108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040105ee9464b7b5a13acc07ce32d1abdae4961107b7fa7a75d1ef9f89ed045. 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/BEX262506109.