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 0x7f67cda2ba7123a4c8f9c5239ab8bfcb0962ec59724d90899733518b73b2dfca. 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/3a987887-107e-442b-9944-62dce681f75c.json and https://artists.proofprofile.net/proofs/artist/3a987887-107e-442b-9944-62dce681f75c.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 0x3de3e34e22e00d3ced2e3bf58d3b099ddadecfac38514b3e2fc2574592d8e012. 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/QZK6Q1974637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c20931719390940f1626ad1be6fcb5b21db96fee121cb9f1fc677b3d9f15ba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ52179355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5e5dce7d03566597af73d4b508b4663dc0f7e0c0bd2f7473465d26cef56b35. 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/QZK6N2155262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13737de64568faa9690015939d7ba063bea128841fae21beeca638c441e499bb. 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/QZMER2179621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b7d12c7f00de54b0a936e0824a35d24d00719175d3c771b194de6553cbca9. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHN52279645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8391e0099c673297bc41b0c249f8902be533cea48f72aa7f772a45311184ae1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNWU2270421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a783d9fd1b9f6f1f8af78005bed2b7b323a500ddcc591ff547f9f197fe7557d. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZMEM2371455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9152d072b1cde3511f87bb0755414841cdd38387abd91e85f2ca20b64be148. 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/QZNWT2311428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5219a85741af26a01a0292eaa66fd81346a250781ed80d0c766cdca8ec4de294. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:16Z), 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/QZTAS2368275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bad506d2b278b431e03b1b7728782463fe2e16b9e35fdf13850b2fdf9d24d9. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTAS2368276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033d93f0ba58f63a306c0ad4e1e8b97923dccd15ccdb445cd579f59995d4a73. 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/QZFZ22461495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554df1402b38bd8e2b769847e46369565c6bea020f14eb647dcb06d9ba99782e. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZES92487981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e83968430967611ebd83a9de3481b5756e3802754bfb92ea9a7fc2b905957d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWY2462121.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c3e3bda086e6ee62f84ac0f01f1544aa979a724cfd058a36d50ec5da724f0. 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/QZWFQ2470731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a91865c4aefd0d19a72457519b70c616712fadf634fa1de82ca6e0d7b42da0. 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/QZZ7U2457188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a91865c4aefd0d19a72457519b70c616712fadf634fa1de82ca6e0d7b42da0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7U2457188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29836710da889efe11c5a8004187cdaa167d1e271874cd84c108ad0ab29851d8. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3F42446518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a852388a43d30ad30139c63b998cbd32b1cb89a97b6c02f5ec9d54643d658c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA72566685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1693853d94e6ec9c6cae0cc22185bcc5fa4a797a152bb978ea9972093766028. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEN2519069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d2bdd2e14ea8b2f610f2499110b40b217a3d7b8a942a958b032d9b3a47b40e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2519070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e98d7d68189a140b49385d5df1237785ef891c1017e548fc52bbf7f77656c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMEN2519071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca59c16628ad96ea0134a4465f064135db46bd33ff5d54e25e9fa3e635097f2. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZMEN2519072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182f42009b1aba1ebd439d4e8102d1f8352b1bf8b9acb61905709d334dabbed2. 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/QZWFM2573846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920a7ab599b833fc32e9c73699ace8f3d3fdf9d437187581415c2950d92196cb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWFS2597014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de3035ad2757a9646b67eea981b38d0707bdc0840f4a00bc877830297feb1e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7S2557272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d5e069cfd2a60cb8fc29b9c20a124c8358f46ccbec033d76a8407bf9a8d16. 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/QT3EZ2504265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210ac93984f949807dadad1d30c2d30740bc36cddf6d14a044d735bcb0851fd. 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/QT3F62501079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691f9751121464d5b3f8fa502372e1e441efbcf8799231dc34718debc580c2b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F92579313.