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 0x55aaf17233b3268e54976f312d1808bf0705092dcfc11f18b0886544f2dd7196. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0cc2172-3184-4e6f-b2fa-fed17a380ff9.json and https://artists.proofprofile.net/proofs/artist/a0cc2172-3184-4e6f-b2fa-fed17a380ff9.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 0xcfaf71d991d4fd5af4f9b4c7605c714f078ef92c4588cc0a73327fe7aa43719f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAU2337790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8c0615f453b9beed1138dc1892d9c69706382af30dc6d46ae120fca1067877. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTAU2386215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eff076e856c7f8a6f6953df3d1f018228670aa9cd30152908bf5a51f68b6cc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:36:49Z), 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/QZDA52446593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e71d7433947317588cbac6bd6b7b0220c95464146c5b8160edd54ccefa4849e. 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/QZHNA2468302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1b5f71582f252c99c18547cac22fb847a660a28ef5031d08ea5d36bbcc6bbc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA2469973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025adcffb2b8d29a781671fc485ad4418937857ca7481fc3fa92168a1d5af6cb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6P2491820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7bf57a77b362deeb2ebf7099468f9966aaca2b9c5671ed9b3c839c91a14a8. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZMEM2438883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b6f764ee7ca8867ed41a5279f15826f3112e87f4085635276bf6444e8d1725. 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/QZMEM2438885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e26f0888cc643616872aa798ec397fb10d44b2de7766365f417b2dbce5f96d9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEM2440125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fd67fd7f91f5aadabad2c64fb423c4a9d3c5ec7ccc05e5abd6ddb2421fc009. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:14Z), 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/QZTAW2436776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dc318013bece1dd3ad31bcab9f02bc09a206c8fcdc96e8b2d5af09ae0dec91. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:37:08Z), 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/QZTBB2458596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f8c92737eb3cba624ec88f52f9f376aab609eb27dea7a870a4f852fba51fea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:59Z), 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/QZWFF2440951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3cdf8842c055936e9eac3589d08ac01a0725dd4e304f1d540668b36b4df8a9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:53Z), 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/QZZ7W2438415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11522dc6f69a954964fd1e541faa53078823d79765921157c95ca3d9b9042399. 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/QZZ7W2457827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f81cf5b1a26de822aa9bda6bc14b3f22c639d7d1232447ca65b06ef9e1f83. 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/QZFYZ2587101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c08461d712549ba2bfbaf69930cfa5512b809620f2b13a313e55945d2bce4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN32562900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b86744ba4c2d47e34522ad48b3cf76340db7e1705cd71b5475a5d2c81ab87. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN42577886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2707de423d816b10bde5af1894ef6df49230d9084b92bc303b8d057f01c304. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6Q2507761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b58eda695ede2421ae2122e3fdfd9019c49e20877a97da61aa65a179c3e62. 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/QZMEN2519398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e866f5bda92ddf8f5b1684d8b09ab978b9df1ef0ff0888bafb0ab7d30c99eaa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:59Z), 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/QZMEN2521471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650c5d9993dd682b0d3b1bb2ade5204e42dfc2de6dc939273725aca998aeaa3. 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/QZTAT2534771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c29ef09c6131824b4f57e634b6857b528ed68bf18ca553016863c8afb10253f. 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/QT3F22546047.