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 0x0c9a99778c485ad34ba0561e24ce55560a73a5d06fd1c13565a783d8d8c3380a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c5eff82-065c-4080-820e-9f461ec45ed9.json and https://artists.proofprofile.net/proofs/artist/9c5eff82-065c-4080-820e-9f461ec45ed9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Enganchados 1: La del Moño Colorado / Ritmo Alegre / Un Pasatiempo Nada Más / Ella Sólo Dijo Adiós / Dime Dónde y Cuándo / Fiesta en Misiones
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 0xabcb0d966da639c6ac5e677cf41236c1dd26d64848f28db68f496a766c11be69. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:13Z), 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/USHM81849727.
Enganchados 2: El Pipiripau / Mi Carta y la Paloma / La Guitarra y la Mujer / Triste y Solitario / Oye Morena / El Mundo Es un Pañuelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7e1ec708a6191953bea786e07c9499c7fec1170be6fbb74126512096dd013. 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/USHM81849729.
Enganchados 3: Quiéreme Más / Te Me Vas / Y Ahora Te Vas / Las Cosas de Mi Querer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa10a479d7800fc2d0e1717f0c67a4e707693d44a9583d435fb42107b6899c. 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/USHM81849732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb111b2fddf8e7cbc78d07e035c0d99d10478b607a9ba19aab121272f0ecd8165. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81849733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa929cd2e0c45a6e2ebf39784aab01ed6283de90dac019b11272dc701e1487ab0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:42:25Z), 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/USHM81849734.
Enganchados 4: Paz en la Cama / Entre Golpes y Besos / Baile Sacudón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb508e86c1b924e70cfa62409ce86976945c44d93b6fd23b3d45b612ca8b143. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USHM81849735.