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 0x959adf98eef08f360584cd164b778e89f0da91ab0a47d925c85413225d1c9f90. 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/adc2c9a9-2bdb-43fd-bd55-b9eae6a95550.json and https://artists.proofprofile.net/proofs/artist/adc2c9a9-2bdb-43fd-bd55-b9eae6a95550.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 0xd9d2e0bb27676958f70a160dd772e15d376ef1bcdf791ef763efc63f5cb85c11. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWZ2189902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b7129715adcc811960c9d46140e7d67c1af2a29e17f6d30b50dfbbfb24269e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNWS2311502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8a2bf418de268f61073f76bc79bc797e159f1fe656c8e50da118ca752b6498. 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/QZNWS2311504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba5a24a3caa7c7a54979e405214ee23c6305626e0fda9557e1e157e008aac1. 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/QZNWS2311508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5817ca0c371860b53997e8483a5599042471cf0912d834b4efcdaf40ad43e5. 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/QZNWS2311510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944278f50ce3a1fb4ffa914272a2e6d3cc85c9b085f58f286020573deaa626e8. 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/QZNWS2311511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d6be78f601ae6d910f5de55779cafcc3a42e7abb46b02b63bf316243ebc56b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWZ2430206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a23841b8528fc193211ee1b905e3839cd8d9812d36dbbea64ef0efe18ffc291. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:37:53Z), 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/QZTB82417874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcaeee79f76eddd6b69a72f77bfac30f161ead9c26044fd2a86681aef7c9e63. 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/QZTB82417875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead1a08360fd020ba2273a4aeb9c8fff3c1ac205e1cb39a9af7da22447757d6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTB82417876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b407dd1ed7f2a16281dc61ef03d5f827a0fd2c66be63c47942810c6f5d03cda. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:43Z), 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/QZTB82417877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec83c05ec57e7a29aea92c48d8741d1884b3251dd051f55ebbea8d3f8d9473d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:04Z), 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/QZTB82474028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1354c502a97d8375b11d3a9c2317442979ca246b62f478abaf6b4121db0b3b92. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB82417879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d6be78f601ae6d910f5de55779cafcc3a42e7abb46b02b63bf316243ebc56b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:59Z), 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/QZNWZ2430206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e4f90ca399aca3deff3aae8c2ec51205f6f4694eca743895b0b5a0376e618. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:42:09Z), 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/QZK6G2568417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d0afd36feeb5ad10bc850b1f7eb9753d4946ef73474f86a87ce9cdd1013f4. 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/QZNWZ2512550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e4f90ca399aca3deff3aae8c2ec51205f6f4694eca743895b0b5a0376e618. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6G2568417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f6fe4b0f88e28dd053dcee1c87bc51a8e893a71a081e962220f3a977150092. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNWZ2512554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecc29fc5323100ff42dd79c624a4e02f54a7aeab3f4daa632256b0fecc8216d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWZ2512555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde53b21fd11ca9abff903ac0a54de7baffc43649832ff4e9df37ca96791ddfcf. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWZ2512556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f19c6f5de814870247798d0d5b423303093bf2857cd3ceb1d26eff3da94ad. 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/QZPLS2523575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475968c7ac53f7025eee1704a20b50789fbaf97d6f6430fcd59f37bd0add5e5b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EX2550450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceacf19ea63dcecc4a42d5af3a12ace7ce06bf6a967887a9fea8c54e5ce34c5. 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/QZZ772422724.