Isaac Griffin (February 27, 1756October 12, 1827) was a veteran of the American Revolutionary War and member of the U.S. House of Representatives from Pennsylvania, serving two terms from 1813 to 1817
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 0x885eb249d3c01d2154b1d0e2a1ec18338d3b2f168c7368613377d07ff95b125c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f892bcb-d8ce-45ab-92a7-9366a00b9032.json and https://artists.proofprofile.net/proofs/artist/4f892bcb-d8ce-45ab-92a7-9366a00b9032.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 0xf1bdd9660a688342588aa4afac305cfd22b420bf60428f4211d37cf55acb8c76. 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/QZMHM2517250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f2d24f486f7b38a1a7d8984d40893ec4095ba06fa47925a1c93fc794328c3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZS642520737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6d5454bf7ca3dce96578f51aed06fff9d8eea44ee49128c97949c7a61a0e16. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZS632596034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed9952ed7202530af712980751601f4d396e60f388b80e3a5e7adf62384a9d3. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMHK2571112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6414d1a34764114f3801382843c8de9083c06ac865a821435e38ff99a93afa9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMHL2510275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e9e0faeee35f612403f8a62b32ae59dda9cf181c26d2886e0c5257e6f41b84. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:37Z), 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/QZS632548192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25e7a5030f941fd9d9a95d959f5de0c4fd39ac5edbf2e2dea786a3d453451a7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMHK2508050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07c3fbde38bb4b952f2d97b37167995d18264a90c80a2f90e33d4295537e8a1. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMHK2547057.