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 0x78029e85aec741fb49083f5eb2508cad53db87de7d615ac40de304a9c5fcad43. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e6d5cd7-a6e7-44b1-a53b-1ec38c640381.json and https://artists.proofprofile.net/proofs/artist/3e6d5cd7-a6e7-44b1-a53b-1ec38c640381.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 0x1d60c100cf08d1a883acd55b2a77aec22364948fa47d0a625627558e497d1af8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9L2275918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f7039e206c74dc2336ef0739e5525c185b5ab907228d12a0eaf5b37769a29d. 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/QZW9M2337935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ae5500e0432362df06178756e485523fa7ff7074e815cddb996a719b9dfe9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9M2249203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f9885aa8bdca83a537608b9413b8cb1e5098897b014ce93b805d4413f355db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2291530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd829ce2765f2aa8e580953717870f5fdbbd741f0f8aa3dccf95fcfedfcd313c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU9249238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec928edf1aa3fa4f6c427228ee7705b47433c84301b92cc6b26c088f57d0399. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU8711467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92907522aee61204e4e1b14e847a743b9debfbbaf3bebc888bb45b72055a620. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2235229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577dbf30a4a901b3c1b5670010ed88fa3d041ddb70b675ef45ecb9e971f4113e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9K2265656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a698f9bd588ac3fe25266d1d4059db549b71860521f5c91647948f12e9aa983. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU5142305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d296e18faba0f7d37c4d90c9304ba71a140c94500c62d44cadaf31de233a7cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2287598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de2363639d68f4ba1732b81883b9af8060a1a41570902bd2f91a789e26dac63. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTVM2266231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379ceb0478557739baa7c788a23ce81a92b4042f952ca0df0a020ee18cd70d4f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2235137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02c13b699e2ae1d4b8ab1ffa4fdd8c2714a5a5f082f0d5197be5364e21dee4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9L2257950.