thumb|Cartoon for Di Varhayt captioned: "How the landlord pictures himself in the great rent war" A rent strike, sometimes known as a tenants strike or a renters strike, is a method of protest commonl
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 0xe03201446ce7f25aede46a906f10ed3969458631e754f2cb19d86d34507b73fb. 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/50cebe4a-ea8d-45b4-8b56-1253672ff403.json and https://artists.proofprofile.net/proofs/artist/50cebe4a-ea8d-45b4-8b56-1253672ff403.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 0x8daf0057d5df10b961a2d6295b73fb07c917cf49e5078d2d7d8039c36028cf8f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:05:47Z), 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/USDHM1800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c594468a08b4cb4537f278f8edcc4a0563c417dc0c50989fca1ae3dde7db3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305e2c1d63f83799ccce25a20bab881776a92da1d1a25a604a1871405c7595d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES72047438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff38ce87f3c2d187f478fd18aa2390c5ca3e1aab37ee15b78ec1f7de01e9b73. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:46Z), 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/QZMEN2102413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e1a5fac9283ec540acbed41c3e6c599c9bd8aad370d5dead08ce30007e685. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZMEN2102414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054211068a30ae74d8fb5ef4a2c664ae090ae0fa67b3a4bb2a55210dca1f2683. 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/QZMEN2102416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284fecc409a1eef7c62eed583380807e059872220270d502ec94f04fc0634b9. 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/QZMEN2102418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6090f00c69f31af6ddaacffbc3e82a2f400549a2c618a6360ea9d74fb4346fe9. 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/QZMEN2102420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a971c5ae4deb571670b29396dc6f57366b5e73309615bf4f3781cdca72694e7. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZMEN2102422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e8b81b2d0b5eb70710c286ed4fb5409d9db2955177be800f8c3eb5cf8ee2b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:40Z), 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/QZFYX2214029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e73500cd3c43194c940e0130c6293b4f61440d91e7c47a39b18ce74c65519. 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/QZNWX2406064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd2c67981f5406163091b23716bfaacd56d73fd854b24215a4222b2ef14d08. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB42484625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6a56aa38ccbb66e15e6146eb58d138f9b4cfaffbb5f82f2e914cf1baad5ded. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBF2488416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a09e3ad867c07efc553f22e717e432c328c06e8e7b9539fa9b5f36db022bf73. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBF2488417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72830f8a5b6a85fdfc3c08bea030f3451b496f39e352e004dc3b0c9364dde28a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAS2472319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bf3619d1e003b95e8727b9176497e31f932ba4f18240175a814550772e8827. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTBF2488418.