thumb|Fragment of a flyleaf with the title of the Gospel of Matthew, (). From Papyrus 4 (), it is the earliest manuscript title for Matthew and one of the earliest manuscript titles for any gospel.
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 0x0020d8d57a52a2fd6a8ed6a65988f3c7d283e58efbadf59e209eea56a107796e. 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/d9c6be89-faff-4acd-ac2f-215c4c37f6f9.json and https://artists.proofprofile.net/proofs/artist/d9c6be89-faff-4acd-ac2f-215c4c37f6f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
And Redemption Fills the Emptiest of Hearts
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 0xfaf33ae80dd78d387a1968657c7104d70543345d7d33d208b3e6a6f64d8ee30f. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCABO1357385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdae39bdd9bd939a3a27ad845fae3a91ef06a7268b8a3a54154e52925b26fab6. 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/TCABO1357391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a622e270cf41a9977e635583f24bf6bec035bb888c5d99bfa3d87158e284e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCABO1357396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7fb602e509062f103a5d65ea4a00a5295a2e408f33573815e14812b760e608. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZES62233202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917725dd41d910a44eb625d403bb873adf1b1d429e2a33265c062cec864494aa. 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/QZES62233203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd788e6bbfe6ed011b437da3f28c7c31714a24fa781fb314a9e4b77ca2f9b737e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES62233204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03935553946ab62518efa5aaf9f2aed2c1a6a634e2fdefaff3ba5256c5e1ba57. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZES62233205.