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 0x35e0661246ac0d4d26a0e2f785bd69163ba6b977c745669bd9644d475bc742b0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/975c88f2-13f3-44fc-951b-562f20b573b5.json and https://artists.proofprofile.net/proofs/artist/975c88f2-13f3-44fc-951b-562f20b573b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choupetta (Extrait du projet Art de rue)
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 0x64fdfd6d59e49b6ff1312ca9aa966cddae6f9b04624f186ef0d6dfeee88d566f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12226233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58006002f98898781bb5561af644d65425c42d3426f80749435c3284fdf6a467. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR96X2556389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa4ebec71730986901234d4f129d69d114fff6459259d629c156451416077e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR96X2556390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0544785a860500e614396e47cf4eb6c176b958536091724bdf3e5cb6007cb6c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2556391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2029b8691049d9964c1988a1409c20a30207b42c3a6d53f037471317605500f6. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FR96X2556392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869e1c27230fb396a89a0140dd8a285b20c4500a859861ea9b579e574916bf38. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR59R2598572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92907c17d21efa00f2ae2aeec218bce2187f101318df8d6d757761d79561965c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X2556394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2083d97291f1a32e6f7e5495ce01c6b0813c04406e508ea2451c45ba76871b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:11:06Z), 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/FR96X2556395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d33b9025d4fedb102e59bdc839618bd4e77305061a5c9025eb21457a857c5a5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR96X2556396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1219862ac02aa79484ea4102541fca17c8c03e7ec6e95bb56dbdbd0df46ec60. 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/FR96X2556397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8131fb6a3802f83abbb40a36c955e040c0bb8c2f74b43a3f2ba13fd78f1baf14. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FR96X2556398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3941f55684abe2cfed83523760157ab32695ea6bfaabd5c30706764f0b44b2b. 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/FR96X2556399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1acaa080f3d43070711d21d0d68ff03ba00715cacd8323a6bd5db7abc922c1. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FR96X2556400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2f363c83ce039978b7c60ab548ea41ed7779eb4afb633041b8388970bf0b43. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X2556401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb18c16c2cbc380319807ec073536224061ce79150fbb40ea54dbe0755ea5fd. 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/FR96X2556402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd171647da92e6dee4bb20ad2ed452ca680d9d66e1a605c761d5446f6c0f00c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRDFA2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd171647da92e6dee4bb20ad2ed452ca680d9d66e1a605c761d5446f6c0f00c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRDFA2000020.