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 0xabf983da4c096edeb90e73a1066454ea2dffa749df3730654de2339b51244a13. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b165d85d-e18c-485a-acd0-9725756ef97a.json and https://artists.proofprofile.net/proofs/artist/b165d85d-e18c-485a-acd0-9725756ef97a.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 0x4692898ae0daffc02501f203d33e12f27c4f06fd53037ac5f52e29f904a5648f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:10Z), 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/ATAS71500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6856c4ffbaf55c65304999d9c3fbc4b6533adca9c619b1a8f4ebb1616c27be75. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:34Z), 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/ATAS72000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8e50075e50edb72080f96ee14e8d7d76dd577b0b08e5b036f1a324abdc424c. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/ATAS72000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed3af8ca1ce9a6acfa4c63e1a971685aa01d4d39c790d15b34bceae119400ca. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CH7812221554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182c15360505c6c106f734cea7e687d73317ba80342e65d25c86968b7142a8b. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZDA82549038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b39f65d5215e66fe6effa0eaa6740bd0bba13344ef97876b90925b4eca17d. 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/QZNWW2501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71949fea4ef5d6caccacbcf15e4912822f995cedba1d788b6c30dbc38e8d4f94. 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/QZTAW2594280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b39f65d5215e66fe6effa0eaa6740bd0bba13344ef97876b90925b4eca17d. 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/QZNWW2501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f82bbec361338ac5dd12dc7b432274718876e1b7308d9a3d1835dc28a26d97b. 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/QZTAW2594281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f86ebb52c3be1d0c8a0bf713cf0450265d1b7daff0a3758221aa0f0584c01e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAW2594282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b762e4debe2c621441488b3219a0fdc8686dbee1a7895c4f847c1d8acffe85. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:16Z), 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/QZTAW2594283.