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 0x33e881cdf3da12f8f48e813f01756831ec97b0476fd564c3af09c8806a97748c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d28232e2-0933-48af-90da-66b069c01ffe.json and https://artists.proofprofile.net/proofs/artist/d28232e2-0933-48af-90da-66b069c01ffe.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 0xbf75d796403f85448baf7c9abb00844cde18f9852f0e7ade0f0401804f23c284. 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/PENMS2301805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389ec0bcc94a7b47a0c59be28a1732b96f40f09c58206e60ec72c014a1ed9f21. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PENMS2301806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae6e61dbd8cbfc44bee3864f2f9ed61da23e2b1bac1a5256828b6d445fac81e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:45:03Z), 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/PENMS2301807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a141af116cd8b668be281141a672ec4db6c857c413bc9a4c24df3958bf2d22c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PENMS2301808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde27571b3f8d36d41b8ad582a51abdcce8922a799e84a46b9027348fee19ce1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PENMS2301809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d21792fb44dc7d9cd1efc485efd66d5301d99f0c86ae9020a7a41e17587a83e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PENMS2301810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47b3cde4699a707f26a0df7fa5963a55eca80e4d606352db258e22198b755d2. 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/PENMS2301811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5226ec45a9fa1a62bbec17bb6b90b154db6789a663e3c5b69f06dc2a034b8022. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PENMS2301812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bc595882ee1275bd016dc3472d8e26dabcc1e2057ec824fad6dcc20ba55868. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PENMS2301813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86178f69890f5878576320b124171c45b90fef07622a7db9ee5dc006af064732. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:58Z), 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/PENMS2301814.