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 0xc438810464c7005f0f9c289a0f584c9a98e98a42e225a229a58f099fcf797fa8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/990c6989-1ee1-4dbb-8e59-12d04259d2a5.json and https://artists.proofprofile.net/proofs/artist/990c6989-1ee1-4dbb-8e59-12d04259d2a5.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 0xf594aadb776fd32ae78277b702db6587e0a8edf39113bcbcfb693c73742e8238. 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/USX9P2314947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45012a79c6ddf460f0e39038c15fd80e888f2c45ecce131e3b3eaab45d805d5. 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/USX9P2314950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c88fed2d23a7220886443cfe440d8c4a5e485318c0fb7ca6bf3c8730807c62. 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/USX9P2314952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4ef7243b1207fd25c44a8fc7ff8d9c463a2f649f7a7f6c497de19ecf6606a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USX9P2314945.
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 0x4faaac9e1a0786685aa1247f83809985514d7c46dd057fb69fac4fa9e8596e18. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USX9P2314946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a237def35d2c959b54d846a90e8640e79b02b8278e85aee6b49b6654c68466. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX9P2314948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd278c5cd0eaeb6c6078780c8b18da8afcd98da0a3e7931c636980ea12ef1f3a9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USX9P2314949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0c5dfe08328bef6fec01441fd5937fee2387c153152b8c6e4acaec107b2ae2. 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/USL4Q2313978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c893c69fd71843a67c0596b0cf7900782c577b9c9da562b9d71953eb6e6607. 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/USL4Q2313979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249b6905b106da2e48fc8bc991eaa1f08bc641019f0afb6cef25fffdde6b8011. 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/USL4Q2313982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8842a3b676e82d3804ce02b370262b0ebd08939060b4dd47b7d2ddf07b3f5a67. 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/USL4Q2313983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bea56a1c733d5baf3438275e56de02e0fd6372793a1b37e06f7b8984194fa. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USL4Q2313977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039cc55dda64a9b7ee480fdec4225eeaf0b57142bfb289ee337c0fb17bd90fe4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2313980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049f2cc53865b225ba87a1702fadbfc746b1e60d760430be7929f188ea207e3e. 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/USL4Q2313981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f97dc45a22e214db23d8e9586ad2910d7c67dab03cdba8449480e4db673e11. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USL4Q2313984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b56b260373d4d7199dd55b95136ec6046eea6acc5dfd26fc201035afd89cd3. 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/USHM82365256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661b3ed9ebbdc66ca49499f2aa3ed695ceb4440019105dedfd1c991e1152f41b. 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/USHM82365257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2d5299699fc70fa89d0422ceed4deb513939246fe9d1b06b12e8a95437584. 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/USHM82365258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cbc6ec0106257fe96e133470d8fbe272b8c08f54eb7fd70dffd0e928fcb2a5. 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/USHM82327545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40d0dddfa5d19ff4b61ef6678d1ff5a9a4b8ed7d39ad77388df0116bb8a7f2b. 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/USHM82365260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8495ee68f858af71124fa9ad3cd89bba1ec4a5cce3de02804efcec41ffe47b73. 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/USHM82365254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9025ecde090304dcce3786dab8d16304795d03db1d7830b342918e276944068f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM82365255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5737c8ac84a9b5fa73e27bfda5cbb41ca51309640b693d2f5c3c952f532750. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM82365259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1899509bc75a5abee9c4ab397cd41b2707870f242c9db286b633ac999f579. 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/USHM22465853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3567a0d22c77a98d1abbcc746987133f650d325a8ab5a752f11227d1008d4. 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/USHM22465854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5c2656efb8687368d570d139c140c5774ffb6a7a5a1b112e74b4e3eff9a5c. 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/USHM22465844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc43f4c1ddba43a26accc2c9e89e0636e03a6b4775ea11b854a210b5aeb61e6d. 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/USCGH2452487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c89ab49ba6fcd96c13dedaa5a561b5dbe98f22c3d14ec45e04acc764fa9e621. 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/GX89G2489462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942c879aa0e8a2e77eead360e13840dd394d14986bae34b21a2f36a3de75d26b. 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/GX5MX2314710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4ab1bbe5f3cf7697e1f521203f8610edbcbdefe5dfa471aa95ea241e7f7894. 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/GX5MX2387837.