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 0xc381111069e85fe139f1803336b702739d6359f4866f93387564bf88b368e389. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a32e73f-2ed0-4779-af80-55d88f4e52be.json and https://artists.proofprofile.net/proofs/artist/4a32e73f-2ed0-4779-af80-55d88f4e52be.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 0xd670c9f8cd1161e4fa8e210f979140231c06cfd5e1d166db243730d6dda6329d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:53Z), 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/QZK6P2083792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e52917c9a5487b0a63ae4ef0a6a060e1ad0a667fdf20253457ba5c8deb5a9f. 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/QZK6P2083793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113dffec44334cd538fdde3aa42d2265e04e81535a6420f588a19de1ab84ee51. 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/QZK6P2083794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db8526457f99f0728438c6fb730ca0897cfd248696b8ffd36ccf320dd6aaf91. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6P2083795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f3ebaf7230b37fb2e09fe22fa6b4542bfca2296844584312e24db814871e8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6P2083796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ad47bf7270e487aae497e2ea03f1d069fab5c95c892700ff84d17af52ad67. 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/QZK6P2083798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3def5c9b4881f98022370715114b64af77ee960169c6d46fb19674690a2916. 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/QZDA42251925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165bcae4364771752b6e677ffa7aa5d4cf79049eb9ef89740aef9501cf31c6c6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZDA42251927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee062cace0a63e04272ad9ee950076e33fa9b700519bf2ccde17ae4fc2ccefb1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZPLS2280130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31413a7b8a356c1ad9456f84fe123a74808f798e43123b95a677860d96c0c3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTBA2398993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7226daf70f246dc6a0db51c8cc9e7b5ad0f7bc42704a906f900269bdfec89d9. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZTBA2398995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549e0de1e4adb987566359b377eea51587726ee5c55fb0c02ee8df2012d50d9. 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/QZTBA2398996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134bcf160df581fe2fc5c066e7253b5dd1748f787f5dfb64842c820d2c92267. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAX2365384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127617039b91a634a2be7f8c7cd55e285c4dddf2ad8f5aa747c32f7f48d22240. 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/QZZ7P2470918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d899d432adf3fa761e4593d57586f37c2292326fe17fcde24c1092590567a8f. 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/QZZ7P2470921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8997fdd07daadeda20f6304ab56ee9456268778f1765b28c1d608192132e3c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7P2470922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de07b7ab48415884a72a00f129106bd454cf554c864d588cecbd6a1fee44be. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB92533819.