thumb|upright|Portrait of the Scribe Mir 'Abd Allah Katib in the Company of a Youth Burnishing Paper (Mughal Empire, ca. 1602) A scribe is a person who serves as a professional copyist, especially one
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 0x7a5c8ed1e07d507df543b2bae84a186b38fa7fc0f7bb4c57d7a9ddbb35a3a60b. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c06b7bc-299d-4f72-ab67-f605cdcc95ab.json and https://artists.proofprofile.net/proofs/artist/9c06b7bc-299d-4f72-ab67-f605cdcc95ab.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 0xad630b921ada6bf692c9e2edf8aaf8213399ce96b515ad03728bdde1c8d26103. 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/INO131300616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254cc958a290e214d20636417dfc726340ee2463f744d44aa289de920d108de8. 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/INO131300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e8f943735ff5ca8c07b00e58ef602a2219d02f8071533ecb3190f0d508adee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INO131300622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5d4c277e53bd79e558a3f792814322814b29e1effd45e1e1995d0231c25cb4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INO131300623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ca78be651958d42577d7a242865018031844cd08f1c13c8127dfef7333c778. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INO131300624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12789a9bc6e17fec0498de82818545da111be5e4e5c4e34950c097cd5f1fccd9. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/INO131300617.
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 0xf8786fca518bce499bd30b6bf0bd67861a89f22cac7fe1ef8ba405e38984f62a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/INO131300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee63e4c9bc706dc3c2fa4da84403c9be81d2ac9197a0b86328a1a98c2d73188e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/INO131300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4410b9f647d589abf6987a1a972e45884609cc5e500022c36c6f8641a22d965a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INO131300621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70abe26144a01d79c9f2a03d5a954c675414f8617724713c184ab108f411bbe6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INO131300625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0e37961074af13e55f9a61324896dd59ebbce13cf69541f90c2c7f341bc9fa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/INO131300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b0018ec2494cecc661e9a3eab9adc1941de9a6395a1d8c1275a6c731cec403. 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/INO131604947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a362b1036821878ca30e56540a9a7feff943cf2cf11f0c9bc0aeb547ef8b28e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INO131604948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3b5bacaec022fee057e2358906dc0110c8172aab663bf65be3acfbe9d895ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INO131604949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725592ad805d938f33ca63d25bb792c4f9a3898b3daae36fc1cc1c0b11002ede. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INO131604951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f626cf77b291a520aa3afac67c6eaebb41698c07b1b6a877498a762a539e81e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INO131604953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22062ea2b5185fb0d52a6a9d70dc64e2a90822ffa136a52e51390dd3540a6ed4. 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/INO131604954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27faa3b49ec5629e48a4f059209e4b37e7073ae7dcb949041adb1bda218e0ef9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INO131604958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626c9e2d632369302ed7d0bca5158b1aba418b07369ba2581e28c9b4ddd2d716. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INO131604955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177461d547b6a503c5e41a1797b7957f3e3718e7a38dd3929a06bb89fe30f3d8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/INO131604956.