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 0xf7b55f267a775ba6cc3236d77a5de1d00c517d65fb059d137c82a53ba29e090b. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f5372b7-2cd4-4257-9284-a175e63ce0ac.json and https://artists.proofprofile.net/proofs/artist/5f5372b7-2cd4-4257-9284-a175e63ce0ac.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 0x31552f29eafbb6819f993f72b0ac23f04258cd217b97fd3917c04e8d199514da. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ARTWQ1300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097826d290ec56829c23d1cc4ab0261762749d2ed7c3273573d1e629f73bc803. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ARTWQ1300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6318e8e8b49e3f8d6d007217cc4e2ceeb023cfbf0471d0be198d10d5e0fd1eb. 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/ARTWQ1300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763f7e10dcf00cc3f2ae3cd3d8d25bd35c77ce20b2fea57e13cd22e3c48c2187. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARTWQ1300413.
La Casita Blanca/el Año Viejo/Dale el Biberón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea09c5f2f2d14b18fffda347d0748a7fcf32f34df56dfa4f0528e22cf0f75b9. 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/ARTWQ1300417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748b16133229ae45cb05a044bed0b2178510e5b5e9f2e7d1db29913442251fd5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ARVW52001587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58c4efe3ef3fe4876c8001128507276aa1004a411ad020dde1dcf5ee6fd06e8. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/ARVW52001590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748b16133229ae45cb05a044bed0b2178510e5b5e9f2e7d1db29913442251fd5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ARVW52001587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58c4efe3ef3fe4876c8001128507276aa1004a411ad020dde1dcf5ee6fd06e8. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/ARVW52001590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf597dfab69602172af4138e95fa667b0872887e0f96e540d1afe50b7d8ba4ad. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ARVW52100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf597dfab69602172af4138e95fa667b0872887e0f96e540d1afe50b7d8ba4ad. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ARVW52100332.
Cumbiones, Vol.1: La Negra Se Menea / Cumbia del Amanecer / Enmascarada