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 0xde51e7fbe996534a212fc636b351b5efd26f6b8f90a1caf8bcb12bda991e8e17. 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/90d1a10f-5921-42ef-9de1-4b9d8e0e9444.json and https://artists.proofprofile.net/proofs/artist/90d1a10f-5921-42ef-9de1-4b9d8e0e9444.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 0x9f48ce3151c80f0af3282745cc52d7745b0311a717cdf7fd76426d608ab46c69. 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/TCAHX2411584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23571c5b8d379a3b471e777feb2ac41501b88b6be4cdb93793d571b32fa51f7f. 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/TCAHX2411884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebffea38a604eb78a8892cd66e6f5b40147efc01ee0113cb6575ebf8eecfec0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAHX2411889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba29483e4dc2f2b885991c908b31f73ff01a82047f3d10896df0eb44364b89. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHX2411897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2d17c3aa58d15428011ec461acf8b222a9c3e1438accc31d15f17b206b9d3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCABR1360971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35d01095cd535053be4a18184185312f23db03e7097a8091fa8cff515a3cade. 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/TCADC1705055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b249a5ae4ec9f8001ec9c2c944d2607194eb74ab178f5c71ac9c565c62cdb11. 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/TCADC1705056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d332311c73073237296e6b51934546d8189df6ae3ea27413e71852fa6d3396d. 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/TCAEB1945513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ba18e85443d72b8df29bb00c5ed1be441f86284515f3f46cfa4e12007bbf94. 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/TCAEB1945517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441c5cf4f77aa672dc4de05dda20334d78430fb4643935245f92ea061d2ec6a7. 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/TCAEB1945519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faed035625c511f9b2c4231ab86389e9d956ee74c870c2a8dfd4f2ce8aa9d78. 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/TCAEB1959817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff0802a32fc6445d239bc1536bac964ce5cf5d8b775875190f7535307cd9505. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEB1945520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64be59c636c88a91393141e70aa3d0a27d8035c93fc7e6eeb154e4bfc404c931. 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/TCAEB1967969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade061b4cb8626708a3ce152868e74fcd86cff874fe59e071489c80ff118f65. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFP2156503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3d1220b10ced7c1fe8476bedfa19c7065c0134844c49f918784243935ff9a4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAHB2329097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f382cc8b378018283977b6792968beff60842a5dea2a30315594130e4f3dbf. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAHB2329103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4143eeafe0af3b5a109a7cb1eceec51b4559241823e67d3568ab59f3c553ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:19Z), 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/QZTBF2387612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110eeb0d93e597539f0f248ec643377b9e51319e9d0064756befbc6b0c5cb9a. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:00:28Z), 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/QZNWW2438076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7bfb842dd07fe6a971af8f6c4ff94763b372e54c1188751744f31af10d9333. 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/QZNWW2438077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a68a9ab0eaa155f67930428300b02f6f2c49393bfe5af42af6dd0663540410f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:05:47Z), 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/QZNWW2438078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37365984d470bdbed41dfdf5b316878356786b717e9f8ec69f8fda833f865e6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWW2438079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cd8f6320cf968b47c5b26daf35a441654911a5ddadfd907a96779ea8635616. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWW2438080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caac9e2243a4e8013bd08cef36bec21ce30b20d308aa80702741015e3761029. 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/QZNWW2438081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ca0cb9edaa0b358af71cdc7ce425f46e346cdb6efc50ad0d868595d5c99a8. 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/QZFZ22521762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c9ec85c09952cbb6e5fa50e0c2670621ae5c7b2b134438af13a49543e26b5d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:36Z), 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/QZFZ62529105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd796394a29a92fc7cc8265b1829bd65f48c90b550e98b0780f4e8109864f4fe2. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6M2557715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507ce52e18ab0933e833181a7b498502334cb481f88240ffe6afa6c904aed98a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6M2557717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eb8f5070cd50451b573571cffbd2d5596318b0615274792ba874d3dd70e781. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6L2532589.