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 0x436513d685a326a4de26c897d763c762cc683a898fb452137457418ef15c9db4. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd3773e6-9ffa-4c25-b39f-7c86c021203e.json and https://artists.proofprofile.net/proofs/artist/bd3773e6-9ffa-4c25-b39f-7c86c021203e.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 0x43543860f4e04f03f1c5811901ce0e8faa0cffb80e7bf0ffe881ff2c60481c8d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/AUBEC2434201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85193ddd9cb6d25b5e1d987521d1431a49e9e1a9b9d6ee70f540bf2dd4834f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/AUBEC2434202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3ab3edc01739831e1f380d124d2b5e1547736ad09d9ef3480d14dea49009e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUBEC2433915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40240bb94bc51043f0abdf588da93c4e04fa1dc17e93d71be6e1ba5df2dd060e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:18:28Z), 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/AUBEC2458474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935e9e8bcf822f9289201e000c713106a651b54d76b1284dcc0dcc293caff6d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/AUBEC2513641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77afb3bdbe89d4579aada4949c472d1ca336c4261fe834d35ca5927543ec836. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:40:54Z), 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/AUBEC2513643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977a5320bc38c72d4ed2122d80b0daef38e340096bf97e955a09942e5d4282f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUBEC2513644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc663dcfcadb6c8793479f32e29b32f0907135518dd491421a40aa215027294. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:21Z), 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/AUBEC2513642.