John Christian Watson (born Johan Cristian Tanck; 9 April 186718 November 1941) was an Australian politician who served as the third prime minister of Australia from April to August 1904. He held offi
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 0x8938d63ac27d9973c5f9a99ae83ac09815364dbf560659c12fac76d7670a5c1a. 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/b0f7652e-caa8-45b7-8f83-209fb6167e92.json and https://artists.proofprofile.net/proofs/artist/b0f7652e-caa8-45b7-8f83-209fb6167e92.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 0x7a0abbfb1fa408308414838084b30c19c414ff847a59a894d7981a016c8b5931. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKPL2001876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f90dbe06201fcffe8649e909d420ada409ac91456b0569b3c9cc8c85ae1932. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKMLH1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cddf73427e781b45bad3079de915a80b7d002720da34a2f061c194888890964. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/UKMLH1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16360991bfdd719624790f7eab2281f3cc0c81fe9b44e2302da2c368e8ae0b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBKPL2007797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92ef7346d9c62c8e4dadf1973bfa577656fe0166eb5acb38ccb882dc981371b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBKPL2004894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb8c0b36012384964d22c9cc2e78e3be79664589da0225d9d24d44e80d5fb9b. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GBMA22157689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8107847bce8643f3f9d8a4a27ffa607fc5dd167302f49f16aa44d4264746c930. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GBKPL2165866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b36c2e38b0a4d74d7168fd5d32088663a9564ff22a73a23ce83a69d47652dc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBKPL2280493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c358eb3dcd7ca2c0ebcaa15fc3608f4d34cec13953feea5e82412b54fb2d4f. 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/GBKPL2215687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e973aa828df81cdcf283f56c6b24ddc1a4dec3b7d034490bfc4a7e0545fa5c9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHN32378996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72266ccf5f7073a75fa16c79a76bd870adf109f566f43b5e3ad690220955b1e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM8DG2480512.
Make The Crowd Go (10 Year Anniversary Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c10f13be240d8eb51d51645283bac1b8138516144ef9c6b47c6832ed2ddf03. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7L2480569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243413456009f49231559916ca42758dba8e735917d7cc31ab33c5890a56cd18. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTB42560277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0d5ff1a229af3adc54eb86018f8ec8e99b3e0f616d9cd2879e6800270b1ed3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7V2520487.
Thank You (London 24th August 2025 Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4def5b4508db14a5c8f7048a22295e13da6c53907fa5d6195713273751db36c5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3EZ2586608.
Walk Right In - Chris Watson & Ollie Weeks Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ec7440981499285570bfc06747702b2b89e5a5f0c1bfcb3c8f9f8be06e414. 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/GBKPL1972031.