Mark Winkler (born 29 January 1966) is a South African writer of literary fiction living in Cape Town. He is the author of six novels, An Exceptionally Simple Theory of Absolutely Everything (2013), W
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 0x30ab1b6c67639fe5e83d8250fd559699acb524261399af4a59546104036866fe. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64a58f1e-596a-4f05-a178-38e9f6404250.json and https://artists.proofprofile.net/proofs/artist/64a58f1e-596a-4f05-a178-38e9f6404250.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 0x233e4b4801291541258015c08d536f8269bb534405d25ad1db50d292e5955122. 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/US9931301076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ca22990c0e757dfaafc62ca2c1df8aea06247fa2e105c881fd4a38b1bf20d. 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/US9931301078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5d419d9a096052ce7ae4b3f138ce55287e5f88accb2039e33602cce4ebb0f3. 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/US9931301080.
Route 66/Alright, Okay, You Win/Straighten up and Fly Right
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510a7560a46f22831a88a2c0f7150d2662e058e800417e3c7c127bac67a8a627. 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/US9931301082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ac51a136044394e062a730e440969ee78d26ad37de2a7ef5c4f06ac5dc8c2. 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/US9931301083.
This Could Be the Start of Something Big
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f6b35bbe16aa77f3cfd19fa97ac71acea337778eff5212c67713c09a727dec. 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/US9931301085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d348799a01bbb48e18df4f5a8bab2be8a1490380a39195df5bbf4b2eeaaf9f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US9931301077.
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 0xe38508dcd44c296794825a25a685dc6b91b31001e1a8b8e970cd10cf242e5d02. 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/QMEU31809846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65440eff0be649a421d9f718ab33a3597223ef569894059d7838fedef226a83. 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/QMEU31809850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3976b733147835b05ce8127d97617d6b3cc2a9d91ba8deb4bfc30a4520af98. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMEU31809854.
I'm with You: Mark Winkler Sings Bobby Troup
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6c74c24387622a1e9d71f7bbf74d74a6545de9dd1b79d4fe2e11720f2ea3eb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:04Z), 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/QMEU32027086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c81a318311d0ecb8dd566e789135c06c50c940972d7768ab6bb5fd740c6f6e. 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/QMEU32027087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1781b63af5c37d39c49bb285b40254f08319b854e8c8e3336e10e7e678d1a7c5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:10Z), 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/QMEU32027091.
I Could Get Used to This (Bumpin') [Plush Remix]
The Rules Don't Apply (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2e296ca746a5f4176d73f1ce90b48a0f839616df0a0a29064d499dad8edd38. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMEU32403471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4560678539d94c4f96cac9c7cf11a73e96a9f1991094b1186c8b541e207b242. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFM2451847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911add61a63d5c600638b520d7ec038c804f10b2c38648bb73e03fda7323edd7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMWSV2410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192295d0bece67d99701adcade1920fb201165ecd3fd810804cba82635c39430. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMEU32506959.
The Devil Don't Want a Saint - Single Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb343c32388cf9f79a81165a918b35f0861b2a4b9a764820faa7dd7a7fe3943c9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QMEU32512848.