Numberjacks is a British animated and live-action children's television series, aimed particularly at children aged 2 to 5, which was formerly shown on CBeebies and occasionally on BBC Two in the Unit
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 0x08dc6de438ea3b368e81b91cabb19de997e817e3d61e10bf884913681a77318b. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bafaa85-b5c8-4788-bff1-749179fa0235.json and https://artists.proofprofile.net/proofs/artist/1bafaa85-b5c8-4788-bff1-749179fa0235.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 0x938e0d442564d143fb1e36fb92c914cf1c5b551ea5cb3e86e3ebc78661434934. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/AUV401447902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf74b45c6a57a098f36061b667f73105e6c54abac62fa41e5c1a6b51c51b0ca1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUV401447904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c0ef4d7ee4def0f86ff3197cedb0067772a19cfc0a32594c52d76ce79f45cc. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/AUV401447905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5604a2ec25a947c9cbc73b2b698e3279037e5a1106e56fdf09f710b9e56c2867. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUV401447908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99beead1a900716a67af55f6be750237a623fad2cf0f2f22f32c9b1ebf969510. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUV401447884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe236367fdd61ed6b3ae27b3fde267938330d6755d081f04c4f09ecc72017d871. 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/AUV401447885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83d0eff036c981bce141d0baeeb6036403d366dd7d3657d976e5e7b8098eb8b. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/AUV401447881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a97eb38d23d2a3100da653f1c4fb9e458f5d4ac932f087f4736a3dda6c700. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUV401447887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968bbe236c283f4b2d2a72b914d410d0a26986e6db08c25de80528d89f34b299. 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/AUV401447882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1ab29f7dd20480aacfa86f374645bfcdbc041ad6b5b48c6e8e29238d52796d. 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/AUV401447883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd61ff49f36500529ce8409a979a8b5d8dbedff159347943a017d83fc4a5e70. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUV401447891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb918a75bde72f45baeaf60a8e83fb57ce031175925bb4aa9d6fc2f9f3b92f5ff. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUV401447894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb371fc9b189ed18a882022d768df8f7814be6828226a2c1c95997c00fd2254. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/AUV401447896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd2229e9842b76cebe51c1757c0f2c3dba65644e56e01ceb37ea4849fc53d75. 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/AUV401447898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0310f883917f992498c6d330dec80d6bbe068a45e2f7391e19b0e3230fe282. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/AUV401447914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8da04a483d0816ea8c538a9690c1bfa0a7e1f01e8c921b9860bc5ca67bb59b4. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/AUV401447912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31bfc0c6aebb5b313a4bad79adbcf242f90235b7dcec6d779484f96b7d9bbe2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AUV401447913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03174b9605e001628d011298c35017e70e893ad0e64e69e46fcbbe03444f60c. 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/AUV401447917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdadd5df773c56aad04df54a6441764c470314f8f5a62c75dc93c528430be14. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUV401447920.