Jumo was a social network service and website launched on November 30, 2010, to index charities so that people can find and evaluate them. Jumo was founded by Facebook co-founder Chris Hughes. On Augu
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 0xa52dc3c36a0f87b0e6816145797a649cbbac35c6de83ca180ac003642f6d720e. 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/9d1dd1d0-4d86-4e08-a2d5-edef56565038.json and https://artists.proofprofile.net/proofs/artist/9d1dd1d0-4d86-4e08-a2d5-edef56565038.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 0x87b58f3b38c06c5b5ed7142dea4f7e9ba3b2957f5a1538e15e364d2808cdb288. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR9W11418898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5bd051c59a5db89fd464bf0b4001d4f10026317cf2b3e659e708b3647de109. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FR9W11418901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8337b0e67fb70e1376af1e437cfa1ba4346049cf60a47d642617cbd2f6a32c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:05:07Z), 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/FR0Z41601000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17e3b293173620aa9e49a49756148ce29849b3c51bdd1c0b6c7122e24a35577. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR0Z41609004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab17cbeeaa218111a3052e8e2893459dfc4d353a2a2d507c7516e5a5c33ba75. 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/FR0Z41609005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf029f84c2fad01d4d022aeb760c97cf3026067b5dc9d62f41b6415e5e4892b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:18Z), 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/FR0Z41609006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a09ff8c8e2970477d1d50e273cc50ba3e72acbabe2368c0cd1cb2ddabece77. 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/FR0Z41704000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4749a131a5e6f4e8c0cb1da8c96123f86ea7849b3f83b85581327e32a9f0510a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR0Z41708003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262e23000bee1f66fba4955b6c0c2068560c6510161bb1758d4de3a5c5821a9. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:43:28Z), 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/FR0Z41708004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d581f03d002b57b4842fcf0899060a46c5deaf415e500c2bdbb97b70dfe3133. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR0Z41708005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5235c7f2f9431e7d88dc552203e07c9e572c5160d4ff41b04b907884199a7a. 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/FR0Z41708006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034adc0e921c003da06e30f4b03008d033d975aa2ba269894a5e1c22c6302178. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FR0Z41800660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c119882aa2c44b077fe7adea279e05330644bf42af051f001dd96a8ded3aedc. 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/FR9W11917592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d3b4a3038e4aaa505c4badf7153862e532ed38c86a6490bcd6b21c6cf78f6. 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/FR9W12003304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b43376b0c3c0321f98e7685a82b4baa18024a37378aeecccd941baaabb8f8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR9W12003305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948359b98d39e1fbf3161e647f494e355baa706c2e816f45d4c8a048285ad84b. 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/FR9W12003307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd1e6bb0064f05bc804e46dd3a52356731ca6d08d5b51960c52010933b08c8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR9W12368002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821c23e279b94201684e05e5caa76ec0155e2b2cd8957b24513015a5a3a8bea. 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/FR9W12509861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1a53f254c3f56c8e0399a67add779b4560442e6ab9a3b7c1015b5b39a9340. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR9W12509860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30870de4e16d4b248aae61feadf8a0b521b4c38b3e910f9b014bbf225c9aaa76. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FR9W12527785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d862f2e156df65e87341e123eb83c42dfd45f57ae23604d0553a43fae34e570. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:26Z), 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/FR9W12509859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821c23e279b94201684e05e5caa76ec0155e2b2cd8957b24513015a5a3a8bea. 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/FR9W12509861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1a53f254c3f56c8e0399a67add779b4560442e6ab9a3b7c1015b5b39a9340. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR9W12509860.
Electro Classics 2.0 (House, Deep-House, Techno, Minimal, Electronica, Future Bass and Many More...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df8117d69636e757e460cb92112c84c779cff6856e9fbb61c833a99c8ca52d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR0Z41609001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c170fe0c51bef3ffed0e0463d7d1a2a670c034cdd519884f5fc791eb907c839. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR0Z41708002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae97f1b9d6c9740dce516092fdbd419e39a9eec51314da79824ff1018675c7e8. 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/FRU701800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9a2327dad488db7440ac813fd81af41ea65f8d582b593000bf47bc427e6a55. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR9Z61800162.
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