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 0x4a77a6c8344948fdd335a89a5f66b4175f3c08228d868db3fb44752369d523ce. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e7e63e8-4621-416a-991e-efacd2451cf9.json and https://artists.proofprofile.net/proofs/artist/9e7e63e8-4621-416a-991e-efacd2451cf9.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 0xdb18d4d4d845e2f90c729301c674bd1691690eb6e00c5ebf6128b92e76303956. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZMEP2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00491a9a1152b224c98b737648760162f7fb55148eb47c2e637227ad279a878e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:24Z), 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/QZWFE2528335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeb4e5de1a6da7e18068993bab6b882e1540ef91fd9287762ff68af78856d80. 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/QZWFE2550529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec08fff32eff2233f88629384b9e478ca4902e7a92cab10f6bd665c76aa685. 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/QZWFE2552379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d092be29def9c25864ef2b930c2c7bab7d582a2d2fb43571ac730c6a7097ff. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFE2548568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7ef122b9f27b8f01a71a6b9ed6bb6ed1c8025b4fbe74534e988bc8003588e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:20:42Z), 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/QZWFF2503684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f8229cd97cc9ba3bb1fe4dc07ab85f1627501cfaaa0cf43e7e78188e2dd445. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7X2578069.