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 0x9d6b5a9c846c0bd99f9e03281c19d364717f644e1fdfbcef02933d7086a31d31. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef0a05b6-0b79-42b9-a09c-dbcad40e15c9.json and https://artists.proofprofile.net/proofs/artist/ef0a05b6-0b79-42b9-a09c-dbcad40e15c9.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 0xb667bd4d54258a8723fda26ff8766bcbfc2e693eae9f32088940c94e40ee106e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAW2380220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b6af50fbb9bc533b276a3ebe8271e1ee5ef7982a85ea4d427be072e9c69eed. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:55:57Z), 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/QZTAW2381276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8053255211177c364030585c227746dd70254a09de00a65abbbf2db18378a4f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBA2342568.
Santa Bárbara En Vivo Desde Rancho "Los 3 García" (En vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea97d2acbf86c822a8185c13a8849509d981afd42b2d24c306625ed2615b7c6. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:00:11Z), 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/QZWFJ2335507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd5b0028be137513ce51c435315e7f3fa9e4c6aa731171c470106794360516. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFP2344737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11dd0f049a7fdd8c1b6085837405a12f3ed87d3844e7fe47aa7d2df6b3f5c05. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:51Z), 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/QZHNC2452958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04afcfbb9a320b39cabc93b4752ac17df7d62939111ab66c428fa185ec438212. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARC572403366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882abe2a4f6a133f8328963d3c72523e277d0e2574244d516728e6fd38a9602c. 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/QZNWU2465980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a9b1d436478d8165905a4f211e8e0773a382f0c064cd843086a3276cce8a31. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7S2466033.