Sofia Camara (born May 21, 2002) is a Portuguese and Canadian musician. Her debut EP, Was I(t) Worth It? was released on Universal Music Canada in 2025, followed later that year by her second EP, Hard
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 0xad7466a21b24b91cae9f35b4ebe5341216b953572b1637cc42795c23426deb8b. 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/57ab6b06-133f-4285-884a-77906ec53a22.json and https://artists.proofprofile.net/proofs/artist/57ab6b06-133f-4285-884a-77906ec53a22.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 0x01eaf5267dd3d99022a1bf11590f98a064bdd70a12569e9f7b9789320310f6c3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CAUV72400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db5c01669bd189dd06d65bc8ceb998e613cc9c86f6d81acaef5e747b37407d7. 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/CAUM72400201.
What Are You Waiting For? (World Junior Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81395b751ff81885d7b6864e5e013cbcbcc62f23a7a5265948038fea3fbdffba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAUM72500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96413afc77108d94202527884cbf521e7ed427430160abeb72b40f9fce09f818. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAUM72500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed7c409f85a1762aa24b799c77d3dbbd29a4eeaf17807f1a18c22eb16de7cdd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAUM72500466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1187416d8135abeee404ff4380fa39166a755e0fd8d500353354d5641f14b223. 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/CAUM72500460.
Christmas Lights (Spotify Singles Holiday)
Christmas Lights - Spotify Singles Holiday
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9489b79c64950dd10b9bb1793cf4dbeed04b3718c8c7d14ed34f22e240cc8c. 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/CAUM72500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8415354f692ba15976b6411a57b585c3283dbddf690529a946b2531622586c6. 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/CAUM72400022.