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 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 0xb900dec15598b2f9139dea0efafd4b86b38139f2ae529fec649a6dd682fffef5. 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/03527015-f3f7-4b91-b77e-5633a2783541.json and https://artists.proofprofile.net/proofs/artist/03527015-f3f7-4b91-b77e-5633a2783541.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 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 0x314bd65426f64e647a45b52c35e2ac582904811ce3a7413dfe4b49a6100e2b64. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWDL72202338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f6abadb05fe49ffa2327c0c5d3e3dd59cb5a1c8e1628caab2e3513170dc35b. 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/DGA052318056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325405989fb8fc796ca18255b340bf52991abdd52507dc434d768cb586d1ca92. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CNZ632300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab68c36c9b2756427a76d4a3f8f81d06c855256a1b0cb0352825d277e24ba473. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG731633664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f05901152830cdd0426631722417b3a67fb724c116d8d3a3708ce932275ed4c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/HKG732251356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e15cb07d3b72dbb465fc442c2acc1e266424774aac37bd5b13c48ccabb6f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWDL72401148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063693c6a0177f3136bef23faf5f3ecd786812d5446b5549fe20c96b9a0a446. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG731684586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ab7f7d435bc36173596086d3a2908ce40df8b120c588d282c9e8ed88991780. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKG731670832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a66a837450e723528ce8ac41c446766fc4e2799bf0e65e20a4d98fb18b8662. 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/HKG732381665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084aef8a7f842225fa17e1571ae6e917794153c0ed82e6679c0d92866dca78b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732358397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22724d1afd087e2a61d84a2dc9721bde35467385326756d8544f229ec8be6d2. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/HKG732328928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc2e16df8092a076a07dd08afa2ada776785ee0eca3a11c5962d3113d4a238. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HKG731600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7547a1eb61086832d73d51fa650fb0cac8c00950ca6ab4f6baac5552d7100a3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ782300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94731e09849be90f7a4c00b5dc21150a5eee321826e1768dba5ec32207501c3a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064fd4bd6f2e20155100df48448d478b8f88c322f584ce9b873906014eef26c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732266212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e0546ee136daba57ee93a494fd33d4c6e8901847480db6b74f69d6460a819. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732315724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd428a09e463208f80e3a16aaf2a9006bf56efcb1136adce68da347524ada1881. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732315404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53dc2883c69c50fbb16957eaef13397bc0e25eb4c025ae8bc8f67464b7cb12f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732315407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7466e34be09ede03124755fb5b590dfbf0c6c9fcad07b021f350b67939f1cd6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732251377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086cebabe23c9b8dc5053347e9306f28b1df28155a6d21416e5748c55636267d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKG732314900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d53500370ee511efe9288f0ffe99377755765d438760ea8e6b44c649c23a3ce. 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/FR96X2251587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe535c9c4b45bca5f39c821475715ce112165a58f0fbc57f1edbe8b8f6246591b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG731545416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec92aab2a6fa5fd052792c69663c6f55b03b2f67d53d0c348a861610dd0b95. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CNZ632200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725a79fe45a077cfc9ab4278a4bafd48b12a2406fd85a89a1311dcda033823b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CNZ632200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3c7b3f9a0f148d9145d24f63ec64170646124b5b51e972713d48c89d404fdd. 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/HKG731752080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd4b46bf751749cb4152040b6539e3723c864f3109179f21fb922de40f2e781. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732122702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb5cc356cc75aae1017f434a36168e722cb67094c8bb0df7536d205178ea32. 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/CNZ632100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cc30be75f023395e577eff043bcac3a465c2191684bd8b6a11a490244969cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R2151525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746d2ddee8c657e8e80241c03d732266370bb58c3ba510fa1ebe1965079283e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732229187.