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 0x709bfc78439638bcbd4ae2bb9ccbe47d23f457006f02d074ea6eed7c416ce577. 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/35578dfe-3af5-491e-8f8e-47ab76214516.json and https://artists.proofprofile.net/proofs/artist/35578dfe-3af5-491e-8f8e-47ab76214516.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 0xfa5c464f1945f2d32d57f197d0547ec5476b778df73daede6b02c0d1e6a2385f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR5K99400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad482031aeff1e3f77dea0ebe738bbb3c9d96bce361ce2f57919369bad0be2e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR5K99400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38627c649c04bf3440650722d9a96c694b0d1acadf501843ada6cd9f3a8ca12. 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/QM6N21495227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b8329882bcdd0976130769b534a6114239626f171aee2ecb4d0ff1c968c225. 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/QM6N21495559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7b5cc8fd2a112ee99d603a88bd9b41240d80ab6979341c5e0fe9560cfd89bf. 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/QM6P41413476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994dc75bcaf2ca1148605703a76d6eb9c636b2329f9ee43abaa51deb1ba1ab73. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:36:37Z), 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/QM6P41415939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb1ffd916d08bfe99a2307d73c7fc21d45fb68070e76e5f9f5d715366d1c0fc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:06:18Z), 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/QM6P41415940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5908d8f25639f639acdde4f257cff49edbaf67e229c41e2575b3a0ffbe77cdaa. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QM6N21868127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7855b1708eb1465b23ca622e63d26bdbd296001f45494b49fa0c5eba0108cd27. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM6N21868128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5dd4a114e20d857c0909e791e49073b80933ef84482ab31a8373b4cf1400fc. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QM6N21868129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601612c7cbea43b1449e8f685bd9045f7c8e637a33319a6f315122c9b4d8fc05. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6N21868130.