Mark L. Schatz (born April 23, 1955) is an American bassist, banjoist, mandolinist, guitarist, clogger, and hambone performer who has recorded on albums for and toured with artists including Bela Flec
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ae113aa4a4e0b46618e5aabfd4c1f763c7d0d78279b2cf19893d42fcaba6b2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7413e38-cef9-4c11-8bc9-84026dc03cf9.json and https://artists.proofprofile.net/proofs/artist/c7413e38-cef9-4c11-8bc9-84026dc03cf9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736a7bb6ef35a3d08d37d859140a86a44fe23b7c44830eee03b09a9b0083c47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USRO29534202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba363988386a9886b484ea01f196ee7589a7fd3e6c32e3c00bdc309b0856968. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USRO29534207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095210822016b1cd2cfbf2e70cca8ef5e2119c98c47db31506d3315a34ff2b41. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA560514937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6e010aff82ec0d475b169080fd6b96827e31c7cdf3aa99aa3e9eaafcd38175. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA560514941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbf86bbd4193a2e71d1cf7c16b9b105b63bd3beddd23e204f95497dcf68fa09. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USA560514935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c50971a05c87540e0445dde018953e0ee7ce324496ecbfe0f105abdaa19de98. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA560514936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf55e07b4ca8ec7416eba817d3336e483f0c559d49c1de90fa52f21194de860. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA560514939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90cae29ec703117d3ef8507434c3134847bf5780aeba135790d9c483a7d064. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA560514942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605ece5f77b397d7ff4995f59e670462ed75fb50cf003b3f5e79db4b4f834d0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA560514943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0100b51f04b3fac029621cd473bac5a938ce908031a49329faf01005e6547915. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA560514938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17685a9f1962a0f2aa4f9bda6956facd50abd536f146a9f825eea15d34e46bd8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA560514994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa044b692a5f3255933901a85200520850692803875dd53d3617920dec999e9b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560514998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa328e9d1be690d0de326911b4636dd386a588e8549f73ba0e8e7ddc940f645d4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USPR90009703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1372b1d4004c9902a789e8021fd0217b95a7fe71fa7586fae892dcb5ca7a2da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA560514940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bec90649a8b7458180b2c1bea33ff437555fe96bc696d1858a13ca7fb009fa2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA560514996.