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 0xe3a793845d57003c9dcbc0f96d816d453aa5e68dd455ff9b89d586abb5a8d3eb. 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/1e79ce38-f7cb-42d1-ac37-5883953fd239.json and https://artists.proofprofile.net/proofs/artist/1e79ce38-f7cb-42d1-ac37-5883953fd239.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 0xd6560b8fe3341a7bf480a4b5d697baffde3fe1fa9c1a603292b45f2f12c5a2c3. 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/SE3GO2305603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980c59c385fde2e6a2cc597dd7df9a3af89341f88f1c63a3463c60bac8cf8f6d. 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/SE3GO2305605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541351d9b0c6453cf57d5dd824c9666f3623f0069b3f550c191fe4ec79c3b24e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SE3GO2305604.
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 0xbf1fea1eb4e198e13904f83a4d0cd338ea144d450f08db8493ec964c914b488d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE3GO2305606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46473a8cf145165642602f10267eeeb844c402ddddf0a1e175b8086ed7345673. 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/SE3GO2305607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c1b4589f835e1dfd9356f1268280d01a84850c0968555ca2966ec82aace7bb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE3GO2305608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bff71306aa4180eede85c3f4def548bf3f906e250ce3b8db70760a1161071b. 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/SE3GO2407001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c89e134e472c717060bf9b41be8037631d4a564118f8adcede313dd012fea. 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/SE3GO2405601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058e1433d19e5937cb72d3a80985e847d159f57a8bf176a77c03c6058975623. 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/SE3GO2403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cb11b883de291c43d009904a867288ed85d72e7ac19c4c0d79f8568f0ecd19. 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/SE3GO2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f033cb55b173443f28409a05419378d22ad421a89b296f5e0fbebbab66d4ca. 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/SE3GO2316401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c82a030b6f8d825bd5a38669ff2750b7e07742f739b872a6357e587d7a52556. 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/SE3GO2311601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4756aee8aec9387f57c7c62898993642d12dc50916e6390dd89e7a5b01bda2. 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/SE3GO2311101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ece3d618e8ceaab981d5f32894d5f42cbb4c5b40628017dbe34ef40f011298c. 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/SE3GO2305401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff0dbc37263d63d3b1c99012fbf6c7b48719a6f36f0b71f433a27e1496d9328. 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/SE3GO2305301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01410fdd3f259e70d91e86eedd46c8b19add5722eb9085e842998cdb5e4e39. 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/SE3GO2305201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02967447e52ee45c24179672b876da0ff5e85c740c0fe9976d8b422e1bac23f4. 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/SE3GO2305101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a46ade7a5eab58fb1c8c6580b9874bbded509c2196385893554ede961ad78. 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/SE3GO2305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d6a2d7ed57f79b7aa2ea63b8123545498b9fc8a339e5b0db7b686510ddfcda. 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/SE3GO2304901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51ced21988f1a9ac81e1d7302249956cc3bbeed84efcaa87f8d4fbdff6a77f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE3GO2304601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e8953d1a5205551b661e8f29c8dce3d5f14289c0fc0c0324a16bf6cec0162c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/SE3GO2304201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c0a38565564c9ea44b386e449d8e2a1b53d7f636db1f520d397e56103e1ff3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:09:54Z), 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/SE3GO2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66f065ce5ac6f7fc686a3891e14175ab9a940b3b8cb3658a423db0645db5f8f. 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/SE3GO2303901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6a26f5c189578dce02fab8682bc86db3b52ae2feab86a0e0f4c41e7ff111e3. 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/SE3GO2303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d73afba015c3b3b713efdc035a8d51f1994481a35229f38209151eafc145d. 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/SE3GO2303001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f21191713ff041c22d9b3fafb9c13b200b5c77d5a950e4c24536c472926ed. 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/SE3GO2301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7244998d46538066e29a6fc76732e57c47458dc8012885896555719665750087. 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/SE3GO2301001.