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 0xca54b5bc70629d961172d139624d513c720253b69c1ff96cd1f4743d5d22ec22. 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/c8412e61-4e31-4bea-ae03-23bc7d3a6ede.json and https://artists.proofprofile.net/proofs/artist/c8412e61-4e31-4bea-ae03-23bc7d3a6ede.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 0x465389838b941302868b14aa6f465956dd91276a961e204e058720bb1fd521db. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2286427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756959d113947ae50fe80747984f28389c7070d1f0f085f97c492bb17b562545. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGWX2091506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf35c48f0ac6708470d1f93bc7dbf7559cbb0f17390cff48d8fefa8f60db487c. 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/GBKQU1887968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdd33290eb41ffdeb23e51685e9061a24fde7a3051642b9342ff959750be212. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU1887965.
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 0x636b34630465ed9de962fe6ebca0ef1974a93dc90cc99c9f8a0e7baa61c63384. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU1887974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa719bba1737a5c7e1d885e7eb34368f6a9f77eee81aca03b6b961827f75c6cdb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBKQU1887976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5714ae6423daad3d32f26ae5a785d57eef3582d72edbb242302d5a148b35d7d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU1887977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85089b55e21739ee8c24b26e87bf549809f96fcb777a146d1fd2bcc66a550e. 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/GBKQU2516131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a3d6f1cb8fc7ed6b9c2e8d1f13a073d3308d3e810128c6eed7739ea49e83d5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ8A2421380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2cf7c6986597592cd8325b5e11846d70714ad3c020fb6dc24edbf5ecc392e. 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/QZWV32451451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f4339906b552dddb3ed46a974a926cb3d21f5a738427fbea1cf9ffc8762b70. 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/GBWUL2397072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4950c954b48c52258db90c43a398bbbe99ba04d2c6cc1d2f36bcff1b4439f3e2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL2397077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b4d3da9c71e4bf19328e38a31bf40ee004a1935826417fa1e6d9b9a57a2bb6. 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/DEMA61906802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c84ffe98cc44fe0c6116a84e76df0e50e3483d315273ccefd2909749ab9778. 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/UKT6B2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548422f4d032d509613da1624159c9777f08ca56d36edbddd40d2eebf74aec4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UKT6B2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2823b74b4329eef0ccabf3d7b1ce3845a014d7d3abe5760d237209cafa11c. 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/USLZJ2322182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b1c82caac6005622ba4a9f6e91c2c530f3a200ab3030179e288dade4e3d635. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKT6B2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28025278bc32547cd9da209946823fb794ced2f95a8ef5b6d8b4bd4ebc004b63. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKT6B2200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb2c2560a639f0ba395fa366f33beb599c7a8c2aefd679c4cae73a93c58bac. 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/GBKQU2203247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca5efda40aca68d8de724043be140886c09d011045868a4fa7fca6af53c3da3. 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/QZ5FN2153418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d7c2b48875707b0851a63181d7460d690c4f793936f5251861a5b8d047820d. 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/GBRKQ2034230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15149213d0b90697bdbe3ef36d836bddaae2276412bc32497caec832899fdd9d. 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/QZHN92097044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c591cf5fe0f69d03e644676e6f2e4345c35d5a6f0afbe0d92e527f0fc0ad312. 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/UKT6B2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3845a2bf2830467d2aefaa6a6d9b77a6e0c986ced4f78afbbaae88c36d1f9151. 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/QZHN41986528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fc82030f16d897de526d9befb8719bd4dcf0721baab5aaf99484a227812e36. 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/JPN841900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec22179abd79990ab0967216586c18545cdbe0dd0066877ae838c1f30ff2a42f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBSMU5601467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c25b0d5001e0adcfb8f7ca6d76c1df2c1e73f388f38fa6a8d7dae87bdcf69d. 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/QZAPG1826636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b66b5477acf9a1c57f46ed0ad410b63ae1dd5451741d1acd8ad65f745226d9a. 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/GBSMU3887874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d59340a3fcd385ca4451476ccb55649b58934c35c1f41125ab2b9a1062e6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU3346892.