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 0xc90d099d68cbac3c085b68e84654d79e0b7157e56eb4f75f554d00a938a171e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2cb5094-a5d0-466d-be35-ee728efc7624.json and https://artists.proofprofile.net/proofs/artist/f2cb5094-a5d0-466d-be35-ee728efc7624.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tierra del Mariachi (México, 100 Años de Música en Imágenes)
Popurri Banda ( La Culebra, No Bailes De Caballito, Al Gato Y Al Raton) - Mariachi Mix
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 0x6315c6de615c3934e2a6bb211e3527b1de07666719328a87fc018b370b829a21. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/MX3192001976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2a4e78f62fc4594eb3cd975e86bb9e7f7ad356bd2e24c4806da6fb04677ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MX3192001979.
Popurri Banda - La Culebra, No Bailes De Caballito, Al Gato Y Al Raton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6315c6de615c3934e2a6bb211e3527b1de07666719328a87fc018b370b829a21. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/MX3192001976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce9d9ab90491cb114f8dd35a0bddc13946c53d63f36a77ee46235c22c2db8ea. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:28:19Z), 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/MX3192001977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcba00023ad7802f6bc14a1f034212712b98a78b91c58370c5b57c0623d4b73. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/MX3192001983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31044a91ceb222e5e2c38366915ec8ea30c3f736eef011f9634eb5403a74b9ce. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/MX3192001987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2a4e78f62fc4594eb3cd975e86bb9e7f7ad356bd2e24c4806da6fb04677ee. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/MX3192001979.