Anna Cathcart (born June 16, 2003) is a Canadian actress who began her career as a child actress, starring as Agent Olympia in the PBS Kids/TVOKids series Odd Squad (2016–2019) for which she won a Can
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 0xf0309ed9c18c2d38425a56ec6887dcb2164cd7578d97694100346bd0316a7b28. 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/106279d4-980f-497c-8531-e373815f4f3f.json and https://artists.proofprofile.net/proofs/artist/106279d4-980f-497c-8531-e373815f4f3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Good to Be Bad - From "Descendants 3"/Soundtrack Version
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 0xd3f82b353bb8472da3c660a9c9ffbef8a27497b22a538b748bee264912231e39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWD11993387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271a74bfd424db89d45749d28c5ea1bec54a01ae94029c903a5159af80a73ef. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWD12096316.
Descendants 3 (Original TV Movie Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f82b353bb8472da3c660a9c9ffbef8a27497b22a538b748bee264912231e39. 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/USWD11993387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f82b353bb8472da3c660a9c9ffbef8a27497b22a538b748bee264912231e39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWD11993387.
Good to Be Bad - From "Descendants Remix Dance Party"/Dance Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271a74bfd424db89d45749d28c5ea1bec54a01ae94029c903a5159af80a73ef. 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/USWD12096316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f82b353bb8472da3c660a9c9ffbef8a27497b22a538b748bee264912231e39. 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/USWD11993387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271a74bfd424db89d45749d28c5ea1bec54a01ae94029c903a5159af80a73ef. 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/USWD12096316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f82b353bb8472da3c660a9c9ffbef8a27497b22a538b748bee264912231e39. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USWD11993387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271a74bfd424db89d45749d28c5ea1bec54a01ae94029c903a5159af80a73ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USWD12096316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f82b353bb8472da3c660a9c9ffbef8a27497b22a538b748bee264912231e39. 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/USWD11993387.