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 0x65f1c0253b0f442b1a0e2eda99ff4f8d1e48e39919c1ad947d1806481c7211a1. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69d63315-6793-4ae8-8fce-d9ff8f41dcbc.json and https://artists.proofprofile.net/proofs/artist/69d63315-6793-4ae8-8fce-d9ff8f41dcbc.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 0x68303af71ac89eced6f1d7e282a8825841bcb1b45adcac5094eaf004dfe4e2b1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GX53U2316995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be7015e9c680ba2f8ab112fdeac49185e1286a2673cd519e9a1da79eefd20e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX53U2495726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c42c0273f02126463de7d0c5d3ad28f7baa763218530f1b0b0fbf6a77935f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX53U2495727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cf919099bef96e17b5076b18f31f4c87d4970bb8ee2b1e28e703f3c883f85a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2495729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18617798bba46f3ebf5feb86d1b90b54478c62f54a6a67ca45674c1d1998c65. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2495728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a383fecfc9045d717a08db07ca6871bd3b2d74560e36e25442802727e0287. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:04Z), 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/GX53U2495730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002797463093fb59e42719bc21669c491e5a856ce0176fba18c69331468462de. 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/GX53U2495731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc644c558da7f69720ac5881b2e5eb4e2c56aa44780329c0f617b6b7fa9d73be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GX53U2495732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c29efbf1a1cc79f7a1d4d3a8b8ce87bf59ee753aed1397261f30a9376e795cd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX53U2495733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c5cdc3af2531f353904a40e43b3aacb17531b9ce31231933688a0705cfa777. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/UKXN22580522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793ad7bb5720d012105ac76a73c67d534cce3a268e3acfb848c665b82c4a4a76. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKXN22580523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7d5412bfe7b5f04cfce13e74607276b3795ae6c0aaad7754bb36c26996c84a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22580525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a11b41a11b09f011a9bed55cdbe6929a7f0444abc6f9f26977cabd7758be384. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22580527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9423c846076b703c5f75bea6692e4fc11c0acb15ab57c629c3c7700fdc028394. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKXN22580528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980b17118a68b68911719b600e5a077bb4d3838e4bc977077c21967d3a5bcec4. 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/UKXN22580529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f86df53dffc2a793fc0b9626aa67d95e2cc2582689ad36fff2afb18b4066aa2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKXN22580530.