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 0x34bb9907f39d3c734c6ab7006769147ee2354fb54ed3fee7acb4075ced7949f9. 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/86ec606f-1e39-4557-ba36-9ca60751cdf0.json and https://artists.proofprofile.net/proofs/artist/86ec606f-1e39-4557-ba36-9ca60751cdf0.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 0xdc5e951ecd8926ba0290f61a36315122fef6e4fc1228845fca60b150aa3d75fe. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR6Q11800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b7b316e89aed0c6d3962490792dba56ec62c4b9be27a3fe0d1330b70686b49. 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/FR6Q11900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe335f577cfa8465683243662cf6dd598e936d8bab732c334c797bc92029ed6cb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:09Z), 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/FR6Q11900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f6a053f03bf049e1524b0d6f7b880afb8c80bae77c48c8b3619676928664dc. 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/FR6Q11900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e1e90f39265f56a65635742af56cf6ef205fd628465e858306a99d732bb2e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFH2077376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1356e3b5cd82aadec3b69809871b8d54660ab74ac9d06fa9f9b258255cc50d7d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR6Q12000081.
Grand bain (Extrait du projet Art de rue)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a3d979cf12d3ec925ed5eda9243a83585ea128e20a35fa6bb18aefeabfaef6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:45Z), 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/FR6Q12100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d054ebc2fa30fa2002687c2b2865c1a5108ed883e25dc108e52fd42eafd71. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/FR6Q12100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ecc0cf9f6400c8f34f2a72185a76434ca3583491130ecd581baef8c721b47b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR6Q12300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897c060fe6d4478d4f2358c13a611578204e9dd9b1b1dbd93118a4fbac0808fc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:54Z), 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/FR6Q12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892c33b0815bcb660f376dff624b1fa2ac8956648401534f914bf4226ba71d8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAGS2217812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97b9d132ccf47cac8ab0d95bad3370c3528a1e5126654a882c5159939139db. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR6Q12300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd097d5c2bbfa14e29db33d56441dc3fac62d5260914377863e449633a68ae14. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:20:16Z), 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/FR6Q12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830eb299d7db41c2b0e74c25ea62b59b6cb20cc4c17c05949859169d1713bb9d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR6Q12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465bd287b6414899ac2e7d3499e32ec14a4238897813d4e9c447a61270918585. 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/FR6Q12400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7887ac2e226b0a3ec93ac18deb6a78240bf58691defd286d37a61e9b6d4e5e3b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR6Q12500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4f41b13b8ee9e436b778978b7bce5ffa3fca1a65f8b9aeceebc67e3da6120e. 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/FR6Q11900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b679378286ce0bc801ba30fe8829da826d79167c21c63a471415bec3268f40b. 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/FR6Q12200014.