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 0x15967c9ccc3524d4f38b020e351ffdc315952a267dcd12c79825d78971ce061c. 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/001797f4-c209-4321-8c37-f9b1723a4675.json and https://artists.proofprofile.net/proofs/artist/001797f4-c209-4321-8c37-f9b1723a4675.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 0x756deefe0348ea77e8e3ca0c2ae99261e810acadfcf226b28e2d30d55317b8fe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHNB2115391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a013020aa12d42abfcb3119a47f1380d35270ae716211987644df4b3469765c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6F2224481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb271bf8ea7f8cb0ce8839afc3dfe48dd7bcfe42e6fea869a6dbd1f4622b982b3. 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/QZK6F2224482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7287821c6267d5d3b07913d6c5ad291d34c5187a355f3eea0d4e94e88e25af51. 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/QZTAZ2248849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0842afa177cbde85b16d56b9fee13df59a6b1c40a6a0775c2c7c1b7fc4abda64. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZMEN2352541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2d8b67e491dd65720ed594c2b6283ee3b264c2d3a63544c7a0c5844c472248. 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/QZMEN2352546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f922007d942b40d8a51f1a4359f1d941c0e4ec4afad2f9303720a7e0f7c63. 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/QZNWS2359202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d15b3b5f3cb29d78d652587bb3e19ecebcfc9c3433b2960896e7df0f2a4daf. 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/QZTAS2334073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04a89ca0d218ba9f6a5d37ecbafc2cccf1073ca1652c052bdae6a13222bff87. 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/QZWFK2362264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f24c8e776b71f8542048fa67c2e53cc6971db9a8592221f52da0a7af094a6. 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/QZFZ42404410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85be552256efece20da102cc953608b1c52c1c428643bedf2965f4f3d79e0eda. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:22:57Z), 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/QZHNC2467014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861bc3f26646734c919d531f274c1910a92a1354c2b40f0243319c8283326155. 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/QZHNC2467016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaee7aafde942b34a12949225127c0e55cc0ece3bec8b0b9809cc28e0a6f4ce. 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/QZPLR2428481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a3666d2108a01935038823f13c9116e4edf52d9df3247a662e4b02c3e9b9a2. 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/QZPLR2447207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c77beaf25d98b76f52e334e460a732282b3669f477453c13649773426c1175. 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/QZHN32518415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f37c6dcfc1745be157d0fabca5707c863fe62f5dd0128d06a38947cdcbd639. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN82555655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e334735363e6373628b2f57b500b86f4c0d314ab6bef6fc8c0b6085b326083b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6Q2534718.