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 0xc879c62d84ecd26f190ca1897904c6829ff41aa4cf26d599e32fa5b11ec8085f. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cbc6cf0-ba36-425b-a17d-0f5652604636.json and https://artists.proofprofile.net/proofs/artist/1cbc6cf0-ba36-425b-a17d-0f5652604636.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 0x936bbd77cba790ceb36b3a69dfc4425d21fa9444a3c0ee44b5d2ddfdb25ac22b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:37Z), 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/QZZEB2421091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8721d5fc2c967997277a68f82b7696b489bb61ceb155616edddfaab82aaa02. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZEB2421068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09bee93d32790e1c7130e78e1f24671d30504e82b6fd6f039a3b204d4fd185f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:05:45Z), 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/QZZEB2421086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2387698941703674e030fbd29834abf2fd8c328c4cf075bf69915d1164a1b67c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZEB2421083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832dd1c9a2777d03d7054d77bcb84310478b1e69433317f855c4d652d73e7085. 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/QZZEB2421081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa124097f1a2c1ea348d534ac5a0c11e95647a5ee1ad7a735f10f7ccdf5cdae75. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZEB2421078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1996420d9e817a1b06f78724cab97c092df4c5ce5c817ee90248e10b9cff17bb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTRX2556844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48479424d316907e6478a2b5ce91a737d06626be1bc9775966eebc302115fb4. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZTRX2556862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9194e87f19369a29c1cb443ead6f210677f6cd604f794b005e10be631485cfd8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:59Z), 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/QZTRX2556864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966be6cbd228a697c56c451c5271ab4d6830fbf2f417242183dd50f08dea644. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:58:11Z), 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/QZTRX2556865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0d573806c8fadaf5380f482c7ca683f0e05fcaad52fa8f0edeb62ca24da27. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTRX2556866.