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 0xc670d17747b7bc39ab8d679e88e5ae936d2fe060ee8e73e826699656207b2230. 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/1d200972-03e2-40bd-8ab4-3460d25d1a08.json and https://artists.proofprofile.net/proofs/artist/1d200972-03e2-40bd-8ab4-3460d25d1a08.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 0x6fa1d9d946e54d195141f29473677406c1e309b51bc31acdbf3a8cf554bb26ef. 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/NL3M12408592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37dcb1fa29c7d9ccb345d81d785a074e93958373f892fd1329cd430bf4a25d1. 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/NLRD52246400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e2f765599a4ac128efada68a9fee1d0dc663103ead3fb5afefbb57b857910. 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/BRLSR0302448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39af064d9356182527b211a901ac9ba34fab8dc538a1131290c781798631c6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR6V81963771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e675b3d18cf5f2918fc2f032876b38bfc45fb430e5df90e205fbd56c220b72. 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/FR6V81963779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0b59c234bb2e1015380b5527425561a0888830ab37d688df1a5c68f94166d8. 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/BR03D2001252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f3fce6e08cd39a3722fe92c2b84a7fdf1da8d8f4e0a160c717fb58e898d6cd. 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/BRGDT0200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b852a38bfe3d726e4abe13b5d2087a0bae90ec318fe117656bb0cd90b7345f7. 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/BRGDT0200522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac3752263c0de2265c0add3c11da7310e774041cf0dfc7e8ffd8adf12b18d3c. 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/BRGDT0200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961a17895428d6e46c466db4b8a897b8f49a291df59cc1db47d1e5b91ea6b64f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2X41767547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b7e02aecc27b2cdacc61fd2dbc64ba140ecedea01397e3d64d6652c76ef080. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/FR2X41767555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb954d1993b04e31c882bf0a907b0659b8a96ee475571c83ac8761f9ab416b145. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:32Z), 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/FR2X41767561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836eea9d67e65413458898f4e00569008eb54a1dc70269162201014e58daecd9. 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/FR2X41767543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2eb7c23aa7edc71d56ee25d5639ef135a822721de1ab452603c1aa6653ba68. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X41767546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961a17895428d6e46c466db4b8a897b8f49a291df59cc1db47d1e5b91ea6b64f. 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/FR2X41767547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147e3dc408b75fe087efeac58a29e47891f1d3a98263010b9acc642f41480282. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR2X41767553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b7e02aecc27b2cdacc61fd2dbc64ba140ecedea01397e3d64d6652c76ef080. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:51Z), 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/FR2X41767555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f3a97f370606a8382e2d69dbaf0268d301beba72d4e1ac8dfa36e5e4e3c54d. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BRKPA0800727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda277b3fad5234ba876b1b6a6a6defea03add50eb0c3d47575e977f9f57445e7. 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/BRKPA0800729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dafb7f8b0f3ccd5f1dbd5620bcda86bb9371c49cf56306150af9c67c7de34b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRKPA0800732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96928c9280218fa16cd52a7a01eac183501f28f594eb3a386f2f533214efab8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRWMB0000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96928c9280218fa16cd52a7a01eac183501f28f594eb3a386f2f533214efab8. 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/BRWMB0000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f60884584da9b021eb40ffdcab6664fc7f9df72e6fa92a82bb1673a3caa807. 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/BRAPI0501204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78788aa91b60ca60b52f6ff8aecfdc9e9cce63e8f08a04fc303fbbf52535bf4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRWMB0000404.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718d6a570c12ce5cb50fc982df61fb4ad85b7472c2671b946ae5bf6dc14aca2e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BRWMB9702732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5cc5c3e737751130100e39de4afffe0b1dbeb5c414850c2bbd619dee4ea5e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRWMB0000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6ff6fa3cd1e881ca9221d0df885bf1ad6976973ceaa0ffe298c51680f03ee. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BRWMB9702726.