ASCII ( ), an acronym for American Standard Code for Information Interchange, is a character encoding standard for representing a particular set of 95 (English language focused) printable and 33 contr
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 0xa71120e847be390461f489653aec8a1c93406e890a0c678b8c6a38ccfad9869d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4276bda4-c940-4b31-9da4-b6117835f90d.json and https://artists.proofprofile.net/proofs/artist/4276bda4-c940-4b31-9da4-b6117835f90d.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 0x73cfa90d57969b6a27ceb8d4b85c5f4aeff721617686e0d9d7f6acffafcca298. 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/QZK6K2377240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfa5f6b9dc194c6caa750f5807567294448047ff07229e6051ff5907a8039b6. 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/QZMEN2390145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afb69e224ca7a014f275b18850715498e19598587b31d24720a921e4b8876d9. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZMEN2390146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b34b1bc9bc000ca514d6446d56e4f6fece61fcc3d74a8eea596db25c4101e67. 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/QZMEN2390147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0ecfde6e4a1770f26a4c9615f30ce097c1a7f549f6dcc52b0876d2b4221f26. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6F2368443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a09d47bea8d02962be2a680455a23487011a0e01432c1567e2ae5a6ab52556. 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/QZMEN2390148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6219414d38a9d38f7c310c9ae90168b6ac4c11e6960aa453746b8cc57de218e7. 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/QZMEN2390149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e3c29505a3d532346d181fbe891490b14b4f5bc99709528de3f2624c303f4. 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/QZMEN2390150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4debf3007c6b3176083886d945935e2a8ff0c0eb82aa8dd83c96c43622687ae. 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/QZMEN2390151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6125e2b1e01e81dd241792fee0e27a1a66d3741e2499250b2788bc991ab8535b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZK6N2328436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7797f178aca649d06c6dcf2d0163288e22245635fe52d52bbb66537ded6b72d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZMEN2390152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325f35b162654c9c3b439feef8cc0d865f2729c337c8acc441caa1d18272fe8e. 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/QZMEN2390153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12375791f3672b08e5e31d919b0660ddd7b12d9492520b24f97c0d8549a31dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES52408577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84380a96e9c598ce92c780a90823e2b5e0e8dfc63ced8452fcbf82cf1ca959d8. 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/QZES52408569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06cb4d3e92b11a9e3bc1f1fc6e71cf5202f1d005f074fe1dcc439d11196c500. 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/QZES52406155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c47f4ec7db87a816091af3085e763cc282577bf59fa9a5f16c1e7246b642068. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZTB42376455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6125e2b1e01e81dd241792fee0e27a1a66d3741e2499250b2788bc991ab8535b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6N2328436.