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 0x3df62cb43630c50dfe9694baee805fe44e61b2bf1ac47644f8ba632fba7544c9. 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/6620ea7a-3cc7-4d4e-81e8-c6536d489acd.json and https://artists.proofprofile.net/proofs/artist/6620ea7a-3cc7-4d4e-81e8-c6536d489acd.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 0x3173966ac668df180667e62e0fde79dd7e645fd0978d21851f10729788869527. 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/QZK6M2221151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b93f6f2a7ca1b98f05f0dc40c0c40f9c2f97faed095f7c82fe12ece9265c4f4. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZK6M2221142.
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 0x6d016b2b6618ceb659cb1b9c72ec9c9d621e0d23ff486e7ea971f99452f2a796. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6M2221143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab507d9111fcf6e7f4ddaba026f03c054644c426b6e0eec59f8f04ba5c2ad32d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZK6M2221145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aae7ce2f4893143824f40a9c91df2bbbb5f1c5eb10ac55a43ba538fc5f93cd5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6M2221147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779fb040f9dc99d2f6bb9a24299abe61ba5db88fb2aeb5b5aa540e250fc0678. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZK6F2302786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc022c2b1c8df54feda7221ba9e6dee479f92ee281ebafa3a04a1526925a78. 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/QZK6F2302787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac181bfdd15235b514b74c76c0bf6a3e2f9d77e52db5fc9a7a2b42dd8d62d965. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZK6F2302788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc8bc3d14cf02fffea6a0a67d2a49646c9c67001a8b580be5cb445c889878b6. 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/QZK6F2302790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d4dcae9a300426bfe29159c238d45e8b3fd1381148abe5ea172e136cadaa9a. 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/QZK6F2302789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054928f2a81d6fc7412a5b7bdd8b430e825713eeab459eee1672f9ccab5b745a. 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/QZK6F2302791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c37dd24e8b413e4c2c75ea2626e4895283604c01404fab5a1202b7ca0645d5. 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/QZFZ72441128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbf8c670ffb827ab131d765a26755e1c7e95f8b6c98440578cf6e63fbb5aa18. 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/QZFZ72441129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a66cb623bb4cc0ec8953e50fc8e2f54da67ea033dee60a05f13f8621f10e68. 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/QZFZ72441131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5468ca5a0debfc0d508c248441ef3330aa94f455555d65ed624af3396e0337e3. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFZ72441132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b18d8b7e137562fad9ce0d6107bd7488ae083d680778d15f8defa41e1faf63. 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/QZFZ72441133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae85e848817cf82b7dd6cb8ce136bb286928c488d204ff5b3b357d694aea24e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:16Z), 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/QZFZ72441130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a58801992d883e6caa4071e4f48c7a9d447138dc695efc12b5b04171c91efe. 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/QZTBF2425450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874da6ec39f4e76f55262e36a12b0eac06010bbd646c9374682568e3a031d924. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ782498702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff119976bf3923c9b183404c8596a7bcce9ad709ae09e4a7f91aac94f358e384. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ782498703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5bbdef2fd962850fb66041a442a7a54685bc3f5a29f7922e603873374c96e1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ782498704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a1d4ba80e5da7ef2364e09ad0ab7893c05d7be33a9e82a59c97e787f2d513b. 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/QZPLR2387182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd202aecf4ed54d331ce9f735d26f46d5085368a2d2ce128c5ac551595484ff. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZWFH2332554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda08c4c43176d93d8ba1a224c8f77b8c1ee2506fc99e759e173ef6854f502f7. 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/QZES92359206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f48a5f47842cb4ba8c0eb7c1c91129bc534dbab5f7ee907c11e29589c0a4af. 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/QZPLR2256517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05eb3576ad8460e819bbce15ac1e4604c2eecf54dc9e1377156dd9cfd3bec05. 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/QZHN92346185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85973f4ba8d7d5b65436ace51ca0b25e4acc59abe12426dd0ecfa9dbe216483. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZRP52302506.