Torre Fuerte, Hector Hermosillo & Heriberto Hermosillo
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 0xe7f2152c54f72fc0d08c562187a37c1bf1e92f9ff219d8bc3616affb7f17a685. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1fa182b-5e1a-429c-96c4-3b357c185104.json and https://artists.proofprofile.net/proofs/artist/c1fa182b-5e1a-429c-96c4-3b357c185104.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 0x0a7da2645d79fcebcc7500dd6219e8ee692467e5cac1322e58f64ae282d4dd02. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM81305972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65db29a7822bdb70b99ad2c935513dbae06786269b89c3392335fe02c2cc68f1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81305973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6e45c89ef621b55a7739be76db84edf3678acc44c227a02847cadde3dedec. 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/USHM81305974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706d54d52f525e4b95b55b3706b3916ec91f282f4770077b071d5e11fcfd3c57. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM81305975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d897e99f589c2841caba0964eb722357a229e1be517e0051cadddd79b79469a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM81305976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ca29bff39a72edd06fc293443d0c8b903966ba1175dd3576e889e45650ecfe. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USHM81305978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e2b0cfe6123141659ee24b138ce9289ce3d0082299df39a207b23e65b38fd6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM81305979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ec944a6da14f4915de640c1fbde981e2f2f273b99daa815401e89d5b430f5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:14Z), 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/USHM81305980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793b8587ad938f0566590129346c27809ede5b0c334ed0738c2e07bec905ffaf. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:43Z), 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/USHM81305981.