thumb|300px|Village square with statue of Christ as Verbum Dei. To the left: the ferry and the ferry house. To the right: St. Michael's Monastery Steyl (; ) is a village in the Tegelen district of the
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 0xd92af8b0808e321fba4ac0cf07d81d4677a3d27fc056a7b205712cd5fcc65fa5. 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/f0d2eea1-123e-47be-8377-58ec0b6fd0f3.json and https://artists.proofprofile.net/proofs/artist/f0d2eea1-123e-47be-8377-58ec0b6fd0f3.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 0x8a72287d68527caab7087e6b11a9854816b3b8e91a5b679bb88bffc2d011de82. 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/QZAMM2208296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee20073149f9eb2d7dafc414340f41e28784065dd90e13524b36f1148a69280. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZAMM2209994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7791070433c4d4f3b5fec146a2f59b9a04440b502cf1a38702d62d5419d0f9fc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZAMM2210888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0a1d21f7d3496ff3227f18f99c226e7a83f5df183173a21439a8fb6e4dc04d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZAMM2214049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a915941fb28d70d72683af4b05f4759485209478f8b1b2ebc91fa457da96fce. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM82497400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4882a29ec9d89e6ea643aad92c1e9420cdac3e43b352d3fadff80f667f53dd. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:17:12Z), 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/USL4R2442244.