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 0xc2d8df3b01124b64cc035b5265c1dcf473491ef3c68b415d6d2d34ac7add5d80. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ddb8d73-63cb-4ef4-a7ae-149dd1a020df.json and https://artists.proofprofile.net/proofs/artist/4ddb8d73-63cb-4ef4-a7ae-149dd1a020df.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 0x03f1d054b55aee172943a1e8fc2e5f893b104bbc3e3955a0d5997d42365f7a6c. 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/ES35G1200875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18db7d6e5689f86f9799bbe2789e313efded794dc1b7d0fa95dcc54fa6d5401. 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/ES35G1200876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b9cc9799f0ac3985b5cb0b29bb0fd2098c281daf5dd8816051ae15575e3624. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US23A1587876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e3d86052cfc142fcdeef1d29274af7b05be080b6ea17771e2dce2a8eccba6. 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/DEUE12503269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f96dc53791605382ba02e4eb9d65bdd7453f48d79e4a6ac7756acaaef85fb8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BXBK62400083.
Sans Vetements - Adam Sellouk & ORISS Remix - Edit
Sans Vetements (Adam Sellouk & ORISS Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3844a928464354750173d6975a7fa68e37fa726c6d57d4b964a5dfe6ba66b0b7. 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/GBKQU2403832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb5d05775c56120dbb4a326b5a7f96d3d9cf7ed9ec9f7e73eddac7e079f8320. 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/GBKQU2397312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9c0b69d84bed0689be783ed2147e6d09bf5399e8d508d4864aac9277540580. 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/IL1022112486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd40fee18750e1ced33f397d4eb0c4a717b02aa9e289ba79a985f893e2f567d. 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/DEY472476395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e3d86052cfc142fcdeef1d29274af7b05be080b6ea17771e2dce2a8eccba6. 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/DEUE12503269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3844a928464354750173d6975a7fa68e37fa726c6d57d4b964a5dfe6ba66b0b7. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBKQU2403832.