"La Demanda" (English: "The Law Suite" / "The Demand") is a song by American singer Romeo Santos with Dominican singer Raulín Rodríguez. This is the second single for Santos' fourth studio album Utopí
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 0x11089ea0aca09e15d6903ac05e8fb6f142eca4847d9d54d2e6da8964cf043eda. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2c362c-e6bc-4027-9edf-df52f582cc13.json and https://artists.proofprofile.net/proofs/artist/3c2c362c-e6bc-4027-9edf-df52f582cc13.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 0xdcd07d9f973126d84e036777a51ca6ee1319c921d38b118b11b4df732c2cc2f7. 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/QZNJW2098035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae64899dbaf4251ca31a34ea061eeb5530884ae429aba6c0a33ce4820720f3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNJV2141456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b68208e07c29e7327ceb3303fd57597f9845fb7928abe57b4ffa1df1e368d9. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:41:10Z), 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/QZK6N2278585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb182354b109505bf1b730871c6bf66b3e814bd992adf3803b683266e7172b642. 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/QZMEQ2266406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9301a901241ed1dac6ab1781b04840dafe1cfab5a979d04618bce5e0338a9a1d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USDXS2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e40f8a9cb8443736614530f187959c4d3a5d4268a622128d6ac78ef11a7916. 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/USDXS2400879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c07f774495dc9da8636e889841ffcf0e5b95b3c1fa273a37c67569ac62ea788. 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/USDXS2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c711bbd8b8f767273b82a76c4ad7e25e10765ebd42a0d245005829164afef17. 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/QZ9QQ2500181.