Mark Singleton may refer to: Mark Singleton (actor) (1919–1986), British actor Mark Singleton (politician) (1762–1840), politician, Member of the Irish Parliament for Carysfort and of the UK Parlia
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 0x6c7ab45ea188e9641242a9199ef3836d386e2fbf21915f00bc2c2478780fdb31. 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/5e2b8630-dbb6-441b-bdd5-d65d8cf01b6f.json and https://artists.proofprofile.net/proofs/artist/5e2b8630-dbb6-441b-bdd5-d65d8cf01b6f.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 0xb03e86d6cb0a7e5cf18feda437b25bb9d273c4dd8fdfc158847c8a7988ba00f8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TW2031482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595eb601900deca53d4b38409653088e2aa1f44e484b78d341bbda940e3f194c. 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/QM4TW2031483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844ca0248abd5ecdf34055ce3efc33b8f0563dd62f9f61245c024270ee4378e5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM4TW2031484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3aba3fc3973af502cd8d77963006fcccfe14e7700e88ba9238ac32d42a7fc6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM4TW2031485.
To Seek Where Shadows Are: III. In The Bleak Midwinter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ca7c4cc37477b3282d4088b18dc685a1afa90060c2ba5a1a228a0d0aeeb84f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW2031486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6717bb3b8e084861577cf9319c73df04ae950fc551f1c76168786448acf7109a. 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/QM4TW2031487.
Now Sleeps the Crimson Petal: IV. A Spotless Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95b1f7215ae9d65802eace6f2e46c121ac6acc365ce99435fad71c4b8f486dc. 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/QM4TW2031488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b836c89900262efea3d29ad9c8b100372886c3eef3bd47c158942aa8d2874a. 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/QM4TW2031489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470944d1205550257d2b0a609b28571ed447765b5c7892aa907d9dda9b4bf34f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM4TW2031490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94a74be68588f443343158c7567426d3c433f3658b18fa59825e96d3f21b195. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM4TW2031491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb399b1c0134176b61e46908ec42129ca8a6a981f8650940ff6accba649de5aa9. 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/QM4TW2031492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8fe565f9dbde1b4e47401cdfb108dd3c012fdeaaf8d36ab3897a6ad906d8e. 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/QM4TW2031493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6a3edf20d6c6ed9d961d0a195ca79f1fde022bfcdfff99494722a934fab81d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW2031494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ccfde70bb2845171dd484ef3a1085f63e455185130d51df969ee855a8aa13b. 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/QM4TW2031495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb646f376e6332ca11c5cf07c0aea2ab5899246d68f35460bcf63b234471acbe. 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/QM4TW2031496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300d851690dcba87a875e4b14cf3802726b095feb5b91d9fec02ea1109e01bf7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM4TW2031497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ede8f4b6ede7ac7b72a00b983afff27ec44179374463f1177cfd9b7e69a88. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2031498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ede8f4b6ede7ac7b72a00b983afff27ec44179374463f1177cfd9b7e69a88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2031498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595eb601900deca53d4b38409653088e2aa1f44e484b78d341bbda940e3f194c. 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/QM4TW2031483.