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 0x84dabb4f0a16f1c1e9a678a9a3111d61b9622f1d9491c3f7465e3aa9d79fa49d. 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/75640abf-80cb-433d-8181-bb8e00e31c2b.json and https://artists.proofprofile.net/proofs/artist/75640abf-80cb-433d-8181-bb8e00e31c2b.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 0x5328a512cdebb2d4e71f44cb96f6459c745d4b694e138a643955e0ed1da69900. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:53:10Z), 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/TCAEG1906330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970b0f5f18c6a00e077eedc3df2fbb21e03bd846710a877727fcafb30f0a4c84. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAES2016433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd636d0005686d3792918ea7d13618340339a5651dd42bc9449e4fac3a3d5d0. 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/QZK6Q2079317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e568e2ddf0bd1cf6077b8d131d855bf01a3739c3df05973094e15025f30645f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEP2034126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ce2efbcc9ecb180250c02888e1a7d1902cdf04a2c416d29d59afc0da0202b6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USDY42230043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574af6938a85959bd9df518154c62483750330b99443144f72354ca4c1acb56. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFZ32115828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9733ec1941bd4c284d50ba92cafd2da6f1a3f8ec7708fae550d8579c60503ff4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES82123829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b565efd5ca0dd6793dc1794a8f06bebaf467a5b17c8e269441cb26787b6626. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZNWS2106864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573611b4bdc53366045b89355612c4134b0b53d704d897b62be54ca13a43c04. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/TCAIH2492607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba46344d8ed5ef50a5a7df67ad386727ebdd5b7cd377a3627a5dd1f6cf30d83. 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/TCAIL2413782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f4b1d40dd8cf2fb7b98428d068496baf29aacb6a46d070f924bc160623200. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB42474665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342f37163e47dfed8a9a8861c2389a16211bae07e981d7ad964fe6432c2dd9f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUGBT2437335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7bae2e84c355235fb84fe34f72f1ce7dcedf7509cee3adc131dbb03163e8c7. 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/TCAJH2516688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aa35704ab35874701a65d338db13d1ada0fb4ea4a162e45b35b1f322d4d22f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ROGRA2500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab52525e5457dae440da2f393c20c7cf2d5c08319ffdf5a83cbae675725358. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6N2512959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195345edeee8d39cf5ca0115813f3b6577fcc3a3a7f58c16669939a59ffc1140. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX452576729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf68f838bf7745880866cc466fe6ac5dfff10e28b6651c4f729f92170def2c38. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/AUGBT2547943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bc5f09b6bb9b783efcd21b4625e1ce5f3547ab3bffc1f941289c160dd91cd. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/AUGBT2558855.