The Backyardigans ( ) is an animated musical children's television series created by Janice Burgess for Nickelodeon. The series was written and recorded at Nickelodeon Animation Studio. It centers on
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 0x72c84dfe02f85c7bb8a1f5ccc50b71897a366415e54bdc87f17f10b96642694e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c1e4ded-f216-4fe3-b4a5-72e0ef09735b.json and https://artists.proofprofile.net/proofs/artist/9c1e4ded-f216-4fe3-b4a5-72e0ef09735b.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 0x3d246b1adbb50961403cbf7d5c6b993b17864e6abc4754b17d06c6d3d0b1cff9. 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/USA820500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99802f90fc6f7e52a3bcdde8747ae201f9706640ff74041d225c1aaa0f5df07e. 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/USA820500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134de8b896da7c33703a13cc840b980556db0985d880e1eacc48b100b05f6db9. 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/USA820500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d694830d41c186a8d299550ebbc6b8eac3e674fb951e60c9d76518d591e3614. 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/USA820500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccb68e43cd14ae2b426790c47433851c79bb9b64116e9a44dff320320decf65. 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/USA820500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ea7f0ff31d87f6d1d93eede8efcaac03559ce1e278b2416b4d9376360b072. 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/USA820500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e030f58ffe32058c3a7fa02f821a90e69bef305e7bfdf6a928d34e42e09b9ed. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USA820500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d14a8bb921d14593525ca5153827fb683cceef7cbcc1bc4d716fb769bc34ede. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USA820500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84019227211cd7230e0d7923af2bd8065dda39452ac30c57a297bfbb31128f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USN1R0602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50fedab696a3a062d1c14a7ae5f8c7421b13382817e3d13e1fcddde9bc662fa. 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/USN1R0602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968c9cce8bb30a2cbdb70b40411de55615e45be130a7463822dffc388aafe26d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:31:10Z), 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/USN1R0602003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd823ad22bfca02094489fcfe0b05033f9a78a63e6c2e7c684f1e9de288efaa63. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USN1R0602008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba5b0f3f5bd7ebe6faf797286d43d3b151c43521132c6e0cbfad135fcdf8412. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USN1R0602009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbac40b7f7ea3c22fb4070c4fd4bf2869141965bba99042894eacc79571e6373. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USN1R0602010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ec1b3ceafdfebf238edb1d5db98ec4e1442e1ec060dc2d6580d5e51554ae9e. 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/USN1R0602011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5e63cc351bf72a7811ede9956ceccd357d397e83748086c461e3adbab21c8. 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/USN1R0602012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97504343ba777bf00b099695707269f7c7f8b79805841fa6a70204dddc0e8920. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USN1R0602013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934531c88658f52fb167763887766508caa48fd9fea38708cf1e0447fa1cb818. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USN1R0602014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b856448267bb3f0e8a20ed60abddd4c0b84ae61ea0a854bb90f965b496fbea6. 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/USN1R0602016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dba30d7edfa105757cfc346c581c0def3193008e75bf23530de25bd2d3bea37. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USN1R0602018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3488f4b562149def1b7ca1c11fe465fedd0ffde6907898f71899e26e6bd85. 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/USN1R0801004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814950d2cc2454125fbc94d0a01f2a46711b0ade788c28ff2a09c849cbb3bbe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USN1R0801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2098ae9e1d2bf91d1fe09db31f60ad5a71e1652005aeed73a82417ca8cfe547f. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USN1R0801009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244f71e090b441d65fdc8d3a9b0f54c29cea2850ed5ae97dba0f4fb49229226b. 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/USN1R0801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb1f94cfa041a0269fcbad50b12234a3d29d8a0cb7e106bf3222ffec8d621b8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USN1R0801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08722018cfa6966214591ca4d30759679b2559be8c3bb63d9660e8e6220934. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USN1R0801013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9bb268bfda407f796b0cdee676652c27331e7766a9bb117dca052e2d1903d4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USN1R0801015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0763466c6495dc9158688a7bf42619a5edb168b586f8de0ddf7af0246e3ce9bc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:41:28Z), 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/USN1R0801016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42677a69ea8d3ac7ee74eb63a111577b100fb5e5ec184a33eea33d4caab10ad0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USN1R0801017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a5689081032ebafb8ced45055dd7b6329b7f6215029b18e5a7a6e109a6f2e. 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/USN1R0801018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e22d5df47bb0315af1195f4868f59b33d93c9216ae4ac5bbc59333fcd9b19. 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/USN1R0801019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf7b308ae4a0f869754b0dbf87a1db07f7e250749625598a0c0624b668b70fa. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USN1R0801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbb121b941450f9b501964c7956890fa3f7a621ab8b24eec5b508d151eb8777. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USN1R0801021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24993d860b19cf7172ec23b8c9e150eaaa5722195cbec111bb60e3ffbb4b4952. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USN1R0801022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd97b828b09d8f87aeb23fe2cad0dc9055261064eac3f7062c2c76f31b6039dc. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:53Z), 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/USN1R0801023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e36baa69c25efcad4120f1c34d0d1f2256461b9ddac520bc2f0d1fb7b11c2a8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USN1R0801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d49f74e84e2e623613bbd42d25d23760bef71fcda46e4cc3878c08d756be1a1. 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/USN1R0801025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4456c6f96eab92b5c8b8a5633271ea1c66f4d495e731133f9ce1b96c0c7db1. 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/USN1R0801026.