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 0x482bfbe8acee23dcddb1cfcfe18ee3daebd237483d8fb3d66c55b2d654d7d434. 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/692e01ff-e28e-4bb1-8464-70f83f8ef8b1.json and https://artists.proofprofile.net/proofs/artist/692e01ff-e28e-4bb1-8464-70f83f8ef8b1.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 0x68d92712484b16a9349950c4dcc64cac572d395813ea64c98f0c071c80fe9b68. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:50Z), 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/QZWFH2498131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee3819b04ace2e4e73e7898187af7f8df936f1bd2d0e5270f7c6cb9a3854ff3. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFH2498132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969a56300cf9f465f90f3360652f209217dbfe10fb1cebcc6c2a1e7523b469d. 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/QZWFH2498133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0967c0036e8e493908ed9aa2ef761fe15238610d96f773d0d74ca00b360da6. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZWFH2498134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0acb9a055fc5d02d6dc4af167e318bc8dbf408eea5821f52373226567dadc1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFH2498135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21877b1fd9e95bd00017094739af7c82d9c46111ef975c18b71c0ac016b30d5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZWFH2498136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f5e7d1f095abc47c9c03045592f0fd2c874a160c9c78b256a3872288b016b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFH2498137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52ef0a243fc1f9add1f5d82e2c686ba0b5108afc1736734cc0edac8c7f7f7bb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFH2498138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a1e4f7bd26b2530dab4a216d8add764fa11b1ce0fb9ff352948a7306219603. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7S2490756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e115818e5ac4544a8fbb59b7c5f63d0b901ea7a0fc1957609d9e05c812a78. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6F2551846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45232be0598a1f29899ddb7f60e24b915eb160150df27c2e7f48c03c1d2c501. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLR2507404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b718b7c012cae7027218ea5da89ff179f5157ab21560288469c9cfd0f2b75e. 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/QZPLR2507405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35426740a82c3b4a036c690812ba4a9683b467aa1faca6a4715de4f4c60670aa. 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/QZPLR2507406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3576a95350f0a2a2a5c53f5a1c3698880bc96eb146592565837055c72a27175c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZPLR2507407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e115818e5ac4544a8fbb59b7c5f63d0b901ea7a0fc1957609d9e05c812a78. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZK6F2551846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c4cb5b8dca31f7391556f55d0a5d50c0fa96f87412d02daef9af6467c442a6. 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/QZHN82554946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23068dd758849ac57ba83365121410981e6a8f53a0985882a4c3047134813c71. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLR2507408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7395ac5c6d66c75b7be314f03fa7db6a0646c19486e0c80bd9b5e5c91b0268b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZPLR2507409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60623e1dc658b67ad47ce7607a9148ebb61907bb66f6c1816af3f78f481fb86f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ792532990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597e8a327d0e8fea5d5400e199e3feed39b5358fed88d602141da4466a9bfce. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F62593255.