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 0x4d1521a8b15b95bcd1a3f5457b4305c6a0e55c6c937395bfa1c9a2cee9d1df94. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c126ea2-76ed-47f4-9bf3-10bb70a6c1b7.json and https://artists.proofprofile.net/proofs/artist/2c126ea2-76ed-47f4-9bf3-10bb70a6c1b7.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 0x195d7188c9db95df9883b4102e766e39efbbac5cf3cc0d1d8dc0d1ff1a9fc75f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:56Z), 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/CACWV1754021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328b0973d06456357273a0e95b89489cb61dc3ffd183666dbe28eacd65c854a5. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZW9K2268011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c301a0b2bbc5f35e244a9275852d082a4d807226bbda622ce0cdfc7c523cffd. 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/QZW9K2289045.
Tú Me Quemas (feat. Gente de Zona & Los Cadillacs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d7bc53e74022db7889d1ddff5129d4be277fbf51a6848c520d0bcf06e806e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71407509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbef7b615f95f80d1f7af5d4c8b2e95da354f2082b15f58ed9bcff5b8249ada. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71416545.
Adicto a Tus Besos (feat. Los Cadillacs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ae5c0da6072361506ee4afed939d9b21eef9db0ec542559f9f4526f61de7af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSD11500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbef7b615f95f80d1f7af5d4c8b2e95da354f2082b15f58ed9bcff5b8249ada. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUM71416545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d7bc53e74022db7889d1ddff5129d4be277fbf51a6848c520d0bcf06e806e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71407509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d7bc53e74022db7889d1ddff5129d4be277fbf51a6848c520d0bcf06e806e. 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/USUM71407509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d7bc53e74022db7889d1ddff5129d4be277fbf51a6848c520d0bcf06e806e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUM71407509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d7bc53e74022db7889d1ddff5129d4be277fbf51a6848c520d0bcf06e806e. 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/USUM71407509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1add8f85973fa453cb1acc571ec9952d64320b7fd3e17619d6232a7d0efec9. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHZ32004984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc9e70593c7023ca8977ea725d73e5186dcbc0d9db5bf40426813ef69bb7fca. 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/ESA011831898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb69c26b8d2fabbf8a92093e1ac2a1b6a381b7321ab5e3f189f8d08c03442bf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/COA6W1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4a1a4125c61e1b99b44f9147c865a31705b5ab521cfc944e6d0a63b952d0f5. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/QZS7J2343399.
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