"Taxman" is a song by the English rock band the Beatles from their 1966 album Revolver. Written by the group's lead guitarist, George Harrison, with some lyrical assistance from John Lennon, it protes
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 0xebbe4f476eafb175b6bc883f18e3b401bd0e50e16d16cb24d8ca42d4a0e33ad3. 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/6949ead4-a881-49dc-99e7-b8b9093dd614.json and https://artists.proofprofile.net/proofs/artist/6949ead4-a881-49dc-99e7-b8b9093dd614.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 0x58f228571864672de21c41d955352e1f262135f8286c7bed1e88f1676d95ee3f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBLSB0800146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce8594dc6c7852b767a0aec92225ee49c572a0ec134faeb308596a6c9d6e01. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLSB1300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4078b06a401f77e67923a44cf2eff3be629eaaeda37e2f1d9865cb2d6bb1dc. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLSB1300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d3eb3eea953d94fd9f1ecd355b0d135ab2167225cb09f10dcd8c3fb1df57b0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLSB1300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc459594e1873b0d5b745d9c8ebfa3458eef13fb3ad28012455374d0177c94d06. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLSB1300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca302ecaf5a403cc7b7eae1c0c20748738c00f8a39a7143f16d840c9abb17ee. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBLSB1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10225336b097163d9d1de6ceaa735a2236573d8e2e353504f62f3c8a02895c25. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GBLSB1600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a420059b90ebe102e7a817c68e3f421ef19fe3ec14428758ebd10d42be4aadf. 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/GBLSB1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb08b4b5a68eda9cdeaf2e96f733b2d545fcc0417ac00e655e9d91631fd3a5. 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/GBLSB1900045.
Scan Darker (Upgrade Remix) / The Circle (T>I Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301288950f657fd4bd79bb0bbe569012178caf7c6c496f9476f9234286cccbab. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBLSB1900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ab1d6c480769ad4e04cef78d7bb63439e10106e9719bbe3a3a6e75cec63476. 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/GBLSB2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc2b26f1a10486d67e6d1792859be91366ff92b7d6514415c9f03d46780dba. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/UKK762362001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746c182a102cb45cc3c786a65bd1cf80a4b4efbeec7adb155ab407d40016ddcf. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/UKK762362002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b271ec69da0bf2add63b55a1b334cba9a22bab3341baaa1fb740e82c6bda2a8. 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/GBTMZ2401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85563a1e04b787bb80c0a129a159bff0db1f0900ed4e516ae05eb641b83b9344. 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/GBTMZ2401252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc515cbd2420b45dc6d3f326f7ca19eb5c4fc260b9de591330645643d15c8ae6. 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/GBTMZ2401254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48183ab2bc639d129a01b67f3b570aa5774a63a3336eace6b7ef9e83494a199d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBTMZ2401238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bbbd86946842b45d6f95a59647cd3ebb12ca199eb50aef2240e29b67394a94. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBRD52400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b5661b98ec3921f43b06e5c58e2440417a298578141d5e85b455ea8f41c3fb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBRD52400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6222d270befbf967ce46ef8de5afb2a1f04241086d18b716de8fb4de47ea7d91. 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/GBLSB2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5f7fe66f9a56623805217cd3984ab2b9064c0b59e5a0e8ac7927543b16b0a. 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/GBLSB1000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ae961c7a4f18d89ce2ea15c09ae3fefd193f8abd0de6ea801312c100a1b4a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBRD52200154.
Something Special (Taxman Remix) / (T>I Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a6f151b4c4b40db176684440c0943c26eb109979dbe102951aa1e1d9d810e2. 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/GB8KE2402490.
Saigon (Taxman Remix) / Smooth Operator (Sub Killaz Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7bee4ab6d50876464d4befcdbd16f9576b90511b9f97d2ab44543fb40e83cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GB8KE2158382.