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 0xbc57fccb63bdb2195352848a5ccc09cbf0a09fff274ead5d620665dce7036db5. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a07f0972-e19b-4ffc-ba39-9b2e25c74494.json and https://artists.proofprofile.net/proofs/artist/a07f0972-e19b-4ffc-ba39-9b2e25c74494.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 0x219a5a3fcde1fdc8613bbda945fbc142a2d569d98c1eb2581945f090e0e06fc6. 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/FR9W12130832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219a5a3fcde1fdc8613bbda945fbc142a2d569d98c1eb2581945f090e0e06fc6. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FR9W12130832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88dd7728b8b136260ceec2821681c6ee9ed53eaea1e7aa3d20168f3b641ef9e. 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/FR9W12130833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bdc85dbdd59b3f7fcd57912b0cef72627d0b2ccd8b471feaca235a2ecfb2b5. 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/FR9W12130834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed341579034cb091ed718454ccdffcb57bbed1f2eca2c7135255586e446a2b66. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W12130835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46600bdb8bff1e57472ba21f4e9fa2e24dcfd7d30e8d79028488a13d9e731c5a. 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/FR9W12130836.
Tristesse originale (feat. 99, GG3 & Har2Nok)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd2321ef519bc54223acf3b5e6b8cb92e075986a34001959f0b160d8d71b88c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR9W12130837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2a4652ac401d80faca05a60c9e89a68dc385de64b0d5200ce973a133d401c4. 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/FR9W12130838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c96ab292dfe8119a31ad03d906f6ef500c7ea8c9d2710434af58fb36ae0b54b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12130839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b47d1264277dbd9dbf41d06d65f8fbdb8d815a9e449c4d4e194bbab5110d5f. 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/FRIDO2314084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61ee207925cc20d5209343d903ee52e7a565ae99fd7e9bca12a99bd62f9fdbd. 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/FRIDO2314086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6895faa91627d2f09400f4fbffad50b01847294b0f850db064df4dd7c5a38ca. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRIDO2314087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeccd7286cab7dc72a2a0a66e373aa548dc9ef8a81aaf647da14fceff9a38aee. 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/FRIDO2314088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441fa19554875bf8f2c212dda965bdef18ddce7a59f3dcd97a0bcca44cf86044. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRIDO2313829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b44cf8980f6506706c8a40974f860a5b3897c25b33f232bf5bd714266624c. 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/FRIDO2314089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94f7a2efd1181fd3c226250e2127160b9c7e4e1e227c92425fed19758c0584e. 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/FRIDO2314090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441fa19554875bf8f2c212dda965bdef18ddce7a59f3dcd97a0bcca44cf86044. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRIDO2313829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c96ab292dfe8119a31ad03d906f6ef500c7ea8c9d2710434af58fb36ae0b54b. 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/FR9W12130839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88dd7728b8b136260ceec2821681c6ee9ed53eaea1e7aa3d20168f3b641ef9e. 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/FR9W12130833.