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 0x4690aa40b22345539e2e3ce2562c3277d740073eb54eccb5655da610aff3badb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1580c441-cae2-464c-b03c-2d56479a80c2.json and https://artists.proofprofile.net/proofs/artist/1580c441-cae2-464c-b03c-2d56479a80c2.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 0xdd7d387280da5b4d01b28f30cca22f0482add46a0c0430a9cac096620828a1cd. 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/JPT552200543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a62cb3a348ca91919c318a382575f9620126a9755b7ab9d27df03c631805c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPT552200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b90a4e625f014756b8ea6db0da6dca9997e9fa64799b01cf1e83d1d9606bb9. 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/JPT552200533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc5e7f6ad33f1472e21ee57c6e72cd857f8f1bdab77ef3bf65167b9e455033. 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/JPT552200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f55a1b627c9b2fe3bfd9c02622334793f0e938833825d3ac4a853696a1edaf. 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/JPT552200537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a3a0d49fd5c02b5c8481e5a8d14ffcf1fe04d6f4301c5423c1f0337644cf1. 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/JPT552200538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218a8e95e4c68c5135cefdde84440e67d044f3f83cdb146ba6eafc6fb94f831a. 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/JPT552200559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28b61d230eaf5bb375b20ae8a0f920d16f9e3c29e0a32cd855382425a9fed79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPT552200545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44993af2f3cc6af7425257d16c5bd6fa288b1bdbdcdf7fb75269ad25d32a293. 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/JPT552200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5f93191c56f1976d79041ad164cb05733873b0e40105cb96a608243a907cd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPT552200544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c699f2f416eb60124ccd19ab6fe8b0b94da55a1d2deb9f59ef6fce63400227. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPT552200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f38614bb83d7ea9be4e3621fa33b6b20481dcc405cef2eecdf06b78c07f184. 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/JPT552200557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f68395259cc681172cc92b7575f51c7de663da5fe230d9e1854cd60f4007f9d. 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/JPT552200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c5ca144ab92ef94aa1e7836c1a77681b3eec2f64eb93132558e50ec5faa8b9. 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/JPT552200551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a5f8fab6966646c8caf47c5fb2fdec5c074a62fdf4493bca785ef200b26b06. 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/JPT552200552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15570dd85c0d732aad6a211e35c6d28fc4e84bde0ccb47f45f6ff9923e0d1eda. 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/JPT552200534.
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 0x6369014b19d5af8ff25a32b4438c731c9ef3987fbfd7388d4089ab41d3995710. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPT552200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22191b9d11c87c8f637b46e5ed3e319ed53b9e915d2111817b135daf1606b164. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPT552200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2c1de59940fd892988950a667bb50fb60ee4603597ad8ab808648b35f96550. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPT552200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2772bbc0e76290c0948351278f20b20410e5fe6b56be6d834eb2b0bb27a60. 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/JPT552200547.