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 0x01489e1e17fde8df172348b1a206633567b45cae0ecc399a1a274a93e4a7791c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6826025b-3786-4f79-ad98-3ba328edee94.json and https://artists.proofprofile.net/proofs/artist/6826025b-3786-4f79-ad98-3ba328edee94.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 0x1aee0e09be912106104c4d90b34d8015f67caa89ecb6e3bc206bd6f43701dd2e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB92335695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f6c7a9ae4a83cedbccfda2314d5e70d11a6bc25d48142157f2c2f3415cdf4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB92335696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5720cf7d7604b6d851624d6ce7712bae91224fbd9b1b7cd35322839d4d5c0c7d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92335697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bafb4c3b236e886b50bf01ef7fd089336c265c69186781caf77403fcd1c2280. 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/QZTB92335698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1d2f6a4ecfbba963fa91010efb0c1722b7cc4bb24bf0f25cd0453a2bd2804a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92335699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed52c768b090d9ec76f2bec11bddd584c59b528e31de48730e17e2d1407433. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:45Z), 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/OZTB92335697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de57b05384b8a76561783c4ed9eab593818afe950051f21b3537133111c8b18. 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/NOX8G2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a757daef6168cdec262e86dc7f3ed406bdf6614d7fcbdd2b6bf15959fda7328. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NOX8G2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b60c0c0b9fbad3584318835ca47af85574b96f8ad710bb50a0af57bf226ece. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:27Z), 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/NOX8G2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f5fc315d32ee92e4c9f6a6cea520c699c617622bd4608ca09ca89277ccfcf. 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/NOX8G2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba1dfa316d46bf29f2ccf5c6b5b8bb1a4b34da2ed777a718867f5f915740f7a. 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/NOAR72512020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf174d4d3395bcb014980c06b64de80840e5c53e30c76e5c04db39483660e49ce. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOAR72515010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7da88f143c481e4daa77cc6a8efe2f64f5971abc4b7419ae62c8ebb8437921e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:42:44Z), 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/NOAR72515020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee1785666c80ec6eb817ec440d28d2693d63e69d5319f6ec1428a4a8b5d27c5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NOAR72515050.