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 0x24b27bfe3219f0657ad0e17ed12e7f9d7ccf42302b0850b22665fa1e6e62657f. 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/f90ad497-8db9-4192-b8bd-73f046c60f5b.json and https://artists.proofprofile.net/proofs/artist/f90ad497-8db9-4192-b8bd-73f046c60f5b.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 0x836c3db318ec79d3389799f57b816797aa381c0034aeb197bbe02bcf13e04157. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:23:22Z), 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/DEL022302001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc563370e30f9d93d218e0d9db0f2ac1e4b7bfd91b69ce4069904ad3c0a2d3629. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEY472371571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3540edd2cbb77782820c1cb842668c9a6cf18c08e125d2e053788019875506fc. 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/DEL022302015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5559f940a4cf37f00cb6077c265c075c9f9b10befbf0fc6f22173f5801ae73d0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:34:50Z), 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/ES74F2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58623ee646e16815bfc248aa48851dd1cad63f7d92936609b96a90cbca27c0a2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEPI82435364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40d2bf6db160703df132144e3ed9c60b800311a66df2ca4604442154ee8d146. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/DEPI82447118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa53e46ed11b3681720d5c041ce16abb389228da54cb75f2642c6b29366f9b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:29Z), 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/FR59R2595024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3206e225461c54951af047f97cf79ad9abcfdaaaca0e455d90b0506681dbf0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR59R2595025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b6c4b2f836722eca981e4284c8d415868df0949737809b7275ab6c1411cbbe. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEPI82511320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b6c4b2f836722eca981e4284c8d415868df0949737809b7275ab6c1411cbbe. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:28Z), 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/DEPI82511320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dba7c94748ff6acdbdacf44859d2b3cc03c387de5a5ed4c0e5cb41f0f130eaa. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEPI82577354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2953937ddcad4478dc42ac70961fdba36a21e0d3531699a6d03943168eed006. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPI82407137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19338714385477a5c7f9f464b99bca8e72fb469c448a297014214fd46569da3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEL022302012.
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