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 0x6bfc4703cde529bb1ebc95804e61ff458cbe94e8a96c16a43b4eb845b63f3f9a. 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/453ad2f7-dce1-425f-9fa0-63d75c33dfda.json and https://artists.proofprofile.net/proofs/artist/453ad2f7-dce1-425f-9fa0-63d75c33dfda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Middelvingers (ApresSki met Mie Anthem 2015)
Bökkers - Annie Uut De Bochte (Beatcrooks Happy Høken Remix)
Bökkers: Annie Uut De Bochte (Beatcrooks Happy Høken Remix)
Mooi Wark - Zo Geil As Een Bossie Siepels (Beatcrooks Happy Høken RMX)
Boh Foi Toch - Hee Hoo (Beatcrooks Happy Høken Remix)
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 0x5630512f5f9b8fc72ef780c6a53c5fb576058330ff9dd8d6b9fb78f130e48e3d. 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/NLSB72300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a1aaf3024823b86444a2610512cad9dd172300804e13a415530726e2792b8f. 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/NLSB72300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35894e17805a6ac6c7e5f100a7174f4cb129786b7b62eee6203f5fb32b67015e. 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/NLSB72300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9a577b78cb52ef21d1e015d0f323f0fdbe77008e32d78786247fee279d2665. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLSB72400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1b45796dd3c9519b3b88a3d5699a142be814f2bd2eddc3fd504971030c9ba7. 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/NL9HH2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ac0ca3c8cd23af870136709bceeda60390bf26961bc86b5b8685d04ea9aa92. 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/NL9HH2300032.