J Mascis + The Fog was an American rock band formed by J Mascis in 2000, following the break-up of Dinosaur Jr. The project released two albums; 2000's More Light and 2002's Free So Free. History Aft
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 0x4d39243a97ddc3e303846e428ad8955e2dead8cbf1d2b5e41fa73ef53bce64f1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61488f27-6b16-4f40-a78a-01e7e3420f55.json and https://artists.proofprofile.net/proofs/artist/61488f27-6b16-4f40-a78a-01e7e3420f55.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 0x286c82a626f04721777888656d0523d5baebaf34cc8539dd8e9fd57dd7e90073. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US5260099901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2156dd940ed86ad563e27ce57d4c6f51ecfda6b6b4f913c72a618d94dcd26f. 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/US5260099902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341d80f956764835ac78b56ebcbf706f369c6b2a3c96cdbb69245f38f005a891. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:32Z), 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/US5260099903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9349a84a1df81b40067a0331c01894e9317962ef5d35b19fb110ebc42c154765. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US5260099904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf1412c7ff64e06d7e35e6893938f920ec3d7551364ce09a609ee547c47480c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US5260099905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e68d725c6d900fc4a4fc9bf35481c993f03de92b32c1a215b677707ffccd2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US5260099907.