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 0x7ad1d5ac9f8f9d2941dc946866b1b7e4b8ae8f17732fcf13ab5457399b30d4cb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c079564-70c2-4f5a-a7ed-fb2f7cbf4c0a.json and https://artists.proofprofile.net/proofs/artist/8c079564-70c2-4f5a-a7ed-fb2f7cbf4c0a.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 0xd90ca61948b05a1ae1b1d9a87cdea76b37c298f5384d1af6ce46fd18f5ca4fd7. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZK6H2145536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe978eb500b63d664ed94c0103bdfd314df93e88a730f751559c51358c364b580. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZMEQ2221911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf319c0d3804bc6419cd0e893a6d102024a9febdd186a06cbe03f7fe9a7e63358. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:00Z), 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/QZHN42222008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35094101f6963e505e3f52ef985f1eb11e5e16a25ffa3867f6fc08aead8deb2f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB92211404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a09c7b0d7ebde404892d688b6c8aa5e6ebc70403bfbae1680be8444a13cee1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2074649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311b33c7d301c0633bdb77d8f40aef67dc4b8d0bb718a94a1547c1c74a7408f9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB92272428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e5d2b66b05b44b4376fdfc1c31b85a899a87b5009dde6da8db5e7d3ea57876. 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/QZK6H2347979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9619cf2aa57525e768ac985347eac9d79ae973a6c763b88efaf7c4260ac7a1aa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAY2363255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ed9df4cb73712b3a4b442d81cc0c7e701bb8a5465e727edc5099b5b33accbc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFM2382187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfbf1835da4b7976f48cb7d5c4cefdfc9d672a11994c6e32e624ddbd69d7194. 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/QZWFN2310428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd552d45d32abbdd320958412aeeb623e23568d5ddb7cdd586de51ff0cd048588. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/QZWFM2375026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e908a2fecc9018a544290069bcd76f7ba7bc76d998582911cbf225c351ab93f. 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/QZFZ62439248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a618227d15e5219dd0a3168cfa8beac80c5cf69dae7d122e32ca1a724d30c. 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/QZMEM2494049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a27556cca19cd60d098469a695adbd311d9b8fde3ffa31881bba4f7875ee41f. 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/QZNWX2420474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ab2c9107a06c0c2d6d182980208dd1ced8d1cf09d32aa9e7dee470ff665f96. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USY242474217.