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 0x87ffe7a191bfd71964d1a8b1bd97cc5e696d375296f17d951423365adb3af09f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc9e3ac3-85b6-4997-a7a8-6789f469700e.json and https://artists.proofprofile.net/proofs/artist/fc9e3ac3-85b6-4997-a7a8-6789f469700e.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 0xedf8b8591f8d11559ec8f64254ac7ce148d6237d344e26a482ec50d75636bdec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2443236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bab5f84d7a02d24d3b69a23fcc1175b96a54a434c0f05bccc0c1f28da92543. 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/ZAPVG2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55338f9903947b2bcc1446062d87e10d432afce4f2d3d5cfe95ff318ff390ae5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAPVG2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b3ddf5ffc4d0af133a702121268d2eb0d105f51d374145ad7577a6da5c4b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2320115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2b7b2ee7c397f7b69e2e8c1591a2a39567b519e0e8ff21989ca0bc12da0b0a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2320116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9994c8c2f1fe75eec2b5e96eb4e02e9dbd957e2174e3317f45ec3c41b0b3cc90. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2320117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803bcbe41318969eb72a8b0fa219748a7910e62144c961c15d07de9ce95130d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48879fca61e5cad051348925eefd6208c0db8b54b1a6adfdb88125771f441ceb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62201024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9249d7ca7293774b307bf5b26b5a91c9cc6d17472517c210e4dcd93b6c0fb117. 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/ZAB5U2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798727323eeef13e9e588854da4182f4369d3ba6f6be0bfb118e90ed8cae3aa. 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/ZAPVG2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e71de84c0f64d577241fa791363cdc817d5bac2db2e82e4d58614de606bc28a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAPVG2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68d6791fc9896b51fb6c2917eef0a304dd080ac81097e1cce5a87d9191f1fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAPVG2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8955bcdc52e2175529052a26499ec7229c9684dff0ad4dad43ba6c77736d73. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAPVG2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b9b1411bb52fd892697749a41e5c4140f1dbb899a19aab2f52965263291634. 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/QZK6G2157640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8900ba7eb0cc4f8b05e51d0c286721e209e8ad23c05484b6d5c78ee3556314. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZAB5U2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9249d7ca7293774b307bf5b26b5a91c9cc6d17472517c210e4dcd93b6c0fb117. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAB5U2200004.