Christopher Karns (born January 25, 1979) is an American turntablist, who won the 2011 DMC World DJ Championships. He has also won the 2002 WSTC World Championships, six DMC Regional Championships, an
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 0x799ca43739ef8ab1a8620e74b98f3393614796abc69a02329351348c4fe22d7f. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9a28633-8ad6-4008-aa42-9b9adaeab22d.json and https://artists.proofprofile.net/proofs/artist/d9a28633-8ad6-4008-aa42-9b9adaeab22d.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 0x5ef95fbfd141bde620e0a10eac909caab462b986303271d65fdea561b2761991. 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/TCADT1801163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd55e28c00db9e27f38c667ed3a193a01239021a0ab2a9b5ce806e5c4456ff34. 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/USHM81947334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b72ffb066ceee2c0f336084033f98254abb8aa59055627269ca8780277a282. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6G2067123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d21736260a2a3b20191e97dcdde4c7cd8260e44d9d17775c505a73c6acd888. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNC2253168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af83610fe494feeb2397b0af469ebe33169a5cd88bb176d10d51cd5fecbab9c. 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/QZHNB2397029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087b80a348a98cdbfa543e5afd1f1b9c44512ec66b4d1f52cac0c5977b966833. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTAY2332569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a97dd8907ee3a994f87185ec1bf55af6934343b2ebb3373919ff7a66f29951. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTAY2332570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edc2e439bf94f126aa439aba7f799f2a844f526d95c1f0fd1f9a7ad0b162612. 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/QZTAY2332575.
Love Makes You Cry (Billy, Sherry, Bobby, Marsha, Baby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed36c1ffc764b0cbbbbf38f9f14dff077e2c144fc09123bbd077d7a2545778f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZFZ72552927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064b7a6b3f78bc0bdcd5fda31aafdad56176d77ca81ac8912e07b395250bd4fb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZFZ72552928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd913fe79261fc9ae70201cb27c0df9dfbf2a8b4a8a5c2ef79912d7a3105b5930. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZFZ72552929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ed7eb83b401e52a6256f4c11ab80367a1edc7d16e5c53083cc832126ac27d6. 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/QZFZ72552930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6fbf2ccac781797b9aba9835821d735c9f942ccd12f34b8007eda9b9888fa8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZFZ72552931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602df30244c58d0b9aec1969849cdf60f763f7dcfee06e49692da8089101d246. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6P2524449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9f9f21e88173eca5cbaee58b54448e001717f288c759d0efe97ac92d371ef7. 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/QZK6P2524450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7091599fea13ee821d7307ffd0dbaa4ea3a96bc2aeb86c2718e4adb978ae71b0. 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/QZK6P2524451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c79fbbcacc804ba803b85c827ebc88bddb20479f577d12a571928d4eae760. 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/US25X2302147.
Drop In (feat. Marvel Years , Chris Karns) - SoDown Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766be417314600989542e2c82595c945cddc9de9951d9411f287222f574f25ef. 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/QZ79W1700013.
Drop in (feat. Marvel Years & Chris Karns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0518806cb046deaa18b50ba72c9d810570d65b889d0b5dd2c056fc2f389904. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZ79W1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcfcec3126979bdc3ef08f1ccf3b78ecfbc1e79ce1dea732c420907ec07991c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL1897187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e727983a3a9ecd29bffd1dc38561fa4fd07f09636949c8049656db86fc069f. 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/GBWUL2273981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c0c40175e2bfc33f70e543d0d64f598f031c1f3dc600d3eb6f55b76d3709ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P1901523.