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 0xd3326e074bbdf85411d45ba5e1477bbca91d713979a839439ede14188ffccd75. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8f19573-8f02-41ce-b6e6-5b405b6ffa63.json and https://artists.proofprofile.net/proofs/artist/b8f19573-8f02-41ce-b6e6-5b405b6ffa63.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 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 0x2ec97cd7752aa743e9b3dd7868434bee7863d284038547edc10c00466fb5a7de. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PRQF51100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d8d3ab5a24c33f243f727983e95a26b7c7261d3534d7ffcbcc037651696de7. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/PRQF51100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0167d72c8c8381b495459feb5dcd2675dfa20ab94f511e32a8c4fdd196352c2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PRQF51100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42b4ef7be24b1150ce4e50e35042363472e77b4f2757d6c253c554db8118606. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/PRQF51100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c9200ea339b82bb3166bf734af92d22ec70ea5f42af02caeff4c423aa2b02. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/US25L0900363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcbc9e4dd0edde6df212fba84e9ac78557d99b6514b81df2bc77b85a2e28192. 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/USEYH1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7543a3a80b9311dbf425f05f1105779a1bd4b7320e9a66c3d1dca4241678b45. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USEYH1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797470cffe871202c98fd8f88139c7c282d645a4385cebb69a7d396ac2dc8a71. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USEYH1100010.
Al único que adoro (feat. Natalie Billini y Eric López)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16baca49e5ae6d19e8d985cae879554ec7bca1ff739aad56dea8b0dd7f74118. 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/USRMC0610462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee4064f8d471358d4a2dfe391d3116a7a573d635721430233666e3e3ee01a51. 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/USEYH1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c9200ea339b82bb3166bf734af92d22ec70ea5f42af02caeff4c423aa2b02. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US25L0900363.