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 0x8e1d29e2cb6fb1f11e5eeb4f97debce874f7c84161110f77defc5188c2a7da05. 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/890f18ea-0f3f-4461-a19b-a01aeb433bbb.json and https://artists.proofprofile.net/proofs/artist/890f18ea-0f3f-4461-a19b-a01aeb433bbb.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 0x4bb977dc028a1f141a70bc73b32e0a5c7bc6950f32225b9fdeb80fef6b3f4b6b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:42:21Z), 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/USCGJ2040900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc1989d11ce182609d43265f9de07bb65c83cbd7b1b15e3d069345477efaea. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USCGJ2040902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80c6ccec0cc407555cc20885cea3eb21a7125c8f30c486dc4776f2c5179183d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ2040907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62adc30b606d486527762b2683e8458cf46e5fbdff71199b4250ab4bb89af7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ2040908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae937d214870e7a89f874049e7de21d38a442f358f0cc0a0fc0b148972430f3. 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/USCGJ2040899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7b67c3e2e334042bd86e1bcb35b09114faa439eae99ac45b15802786815c7a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:58:37Z), 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/USCGJ2040978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85627d62c807f459d92e076b949a1b7b6d8dea023f8d73e7bcaa15ba33f87b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:52Z), 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/USCGJ2041105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187934cef8dee38d8a57c73eaca2ba6e678fa29590782060a9d99ca4183adb2. 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/QM3DF2140070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f73391d5acb63c2aa1ba73f75649dcb6f798a32dc8e1947b0c031387fadf443. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM3DF2140069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f48d4b8e87abdea6cef54911d5310752b026115749115168d3e0640c36169d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2140072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163f3c26f54e031747f400551232f963877ebf503b146902ff7b88d752e0d13c. 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/QM3DF2140078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187934cef8dee38d8a57c73eaca2ba6e678fa29590782060a9d99ca4183adb2. 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/QM3DF2140070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f48d4b8e87abdea6cef54911d5310752b026115749115168d3e0640c36169d. 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/QM3DF2140072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aff34ac198649ff32153c83fde6ab49f772ada173475a1f4da1944ca8fcd2ad. 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/QM3DF2140079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce522d7dd8e6475d7e8e79946e3eb7d2bfd006657d05711f33be65a0c7ece9f3. 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/US3DF2492460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7882a3a4e9b26b3aa45b0ea65096da697693935e14d60a6544f8f4acc096316. 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/US3DF2492458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228e21c3f133e272c82d0340b8a2e484ef772e5366cdad4d3138cfd25519f583. 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/US3DF2492462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5b57fd6169313821e1df456d48e9f4771de96168df13351a455434dbca6ed5. 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/US3DF2402236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a79787e0de86cfceb788e807f9e8e03d79724594828ece9fc1746ca428131. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2365571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1269df558614edc2de377c7eeba584c6fdbe476790520a2443a4f51ebbbc56. 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/QZHZ62243787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1269df558614edc2de377c7eeba584c6fdbe476790520a2443a4f51ebbbc56. 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/QZHZ62243787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456c2688bce9e92cb965851a8225b9c4a50383fcf42b76c284a1073bd9df3bca. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:53Z), 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/QM3DF2140074.
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 0xab7192ce6154f1e0e1f3fe745c0eec5b98f38f0974ed43d7b19a06ec9703114e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/US3DF2492459.