Jojo, JoJo or Jo Jo is a given name, surname, nickname or stage name used by several people and fictional characters, including: People with the given name, nickname or stage name Musicians JoJo (sin
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 0x5441eba68269b16301d7cfebfc1356d5c1cc593fe3b5042af4df6aa143979faf. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e311775-0c2e-4b1b-9c89-9ebbfbad5b1a.json and https://artists.proofprofile.net/proofs/artist/5e311775-0c2e-4b1b-9c89-9ebbfbad5b1a.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 0xab85574da3fc220d0982cef175fb3f7481e233eeca912b32cf2fae58f514b155. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMFME2255831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d03f7a940d342bc663a1cd7f326ad9643b0aadf3ee602beb952e3dcc085f729. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMFME2255833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6992b110ba32ee107f7d4d7085f34610bad7de8e5cf87767dda6251c7ce6a834. 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/QMFME2255834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd266f073be7ecb7bf346415584de68a94d13d1f2f59ec7312ee2d8ed37ec8841. 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/QMFME2255869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e744fff908d55a0a4fe2468ef9480e8ffd27724ed5cc8448130867fa6c3e23. 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/QZHN32469120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eeec9e9cee12750e58664a368b6539f1ac3a7fd977024808a493319eff8dc6. 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/QZHN42122858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a5041cdfbcf93f2f279345f6978ea41de0e8f7ff675cadf52aaacd86d6b246. 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/QZFZ42131299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf51366d327c7587418e4fa682dd245b94509be489620d32d0ef77a7f9d1b2. 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/QZK6Q2089517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716cef5dfd478bd3afaf5d22aba981f67dff26c5d92a97557303903d67230244. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHNC2024097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5510cdd0bc0a2fdfcc7f8ff76d790d5b2494ee3df3644b0ef8218d8c307c5c. 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/QZK6Q2089519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b21e760035920afcf2c2e99cbcf4ca0522b70ac20a4d251f961db1bc5a282. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHN41904110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aa782ac8aa3a7a1ffdb267eedf4dfd4346756ddc3dcde38ac09f836fa573bb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZES51946657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef553ffd39adfc8a08e7483f7c6cc39fbf29e3e809c16ca51d3fdd88ee3f69. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES71961513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfbae724b8ed9173c2cccd83bff9f0f5095440d6c1c61666a5618f137b3b945. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ7S2403870.