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 0xc0fed3d9e7ddc05b0ea6a35c7bcc459e7ef74ee0f32ac912c40ed02e52b25474. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25a787e0-8f03-4be2-aa46-dae09ed41294.json and https://artists.proofprofile.net/proofs/artist/25a787e0-8f03-4be2-aa46-dae09ed41294.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 0xe0a1f3ec4d6d5cdb886c35961278cd6d1640e0884af2d9f7dd08ef6bf88c0b6c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:15Z), 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/QZPEW2501407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd73d9cd28701e6a21411e2c44e2697252579352c7cb42ed1939b9734fc9e62. 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/QZPEW2501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a55a87f8058e2ba505a6787e6ff16a6fefe78932871f5ee7b9423beabd419e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:39:49Z), 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/QZPEW2501409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a67bb3ee5534b7b27a1f3ae83831a831664c653922fe3cc078d6befcb8af100. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:12Z), 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/QZPEW2501410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e19af51ad5e9edb557904132950158b5a56089cde39dbb823e218baec97189. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:17Z), 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/QZPEW2501411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3e046d584f1b6529f56113bc76e827ed37585186f241af3e1fbdd61bb47a3a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZPEW2501413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ab79150e3121cc2491e405fc37175f63ea908c8666230ba4594b38ab9826a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:31Z), 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/QZPEW2501415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0166ffac0f4a907bf6f21c7a3431fde15ad68c11be63ff84eb8c2b0546b6742f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:37:55Z), 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/QZPEW2501417.