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 0xe486a5a38598cf51cf481c8028b2ff17b341f0d79385ce35e793da4bdb0fbb82. 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/f5386f2e-e75a-4ae3-bac4-d2296d653450.json and https://artists.proofprofile.net/proofs/artist/f5386f2e-e75a-4ae3-bac4-d2296d653450.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 0xd06dd9dfcc2e9c6a1b3291dc054d0b96c93a502a73bb0e3baa04cf389d7ad29f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM22109438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77918a864e20ff3a2e3a93442cf3caca0ba697f2b5357e267b03ef7e01d4907. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:09:21Z), 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/USHM22293168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a37bf37384ae07ba04cb610f9bb3a9ca8106e51b86bb0b57ed1fb17749b2438. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:54Z), 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/USCGJ2173330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987d3b3e97cbed7ff7bda25861930f2f2879d3c8a610ad274ea36d5f3cb57ec5. 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/QZNJY2287929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249bd21ace245008913845253f103fbd37f832f819765e47db905740306dcb03. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGH2198202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e46d8c8b8b9fce3ae2716d208a18c45054cf81ea8ea484f3b2aa0b4b53b90. 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/USCGH2198203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14670f72957766e9244d5bccdfafcae71d0a3ea9751b2b01fed7ee11fd293ff. 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/USCGH2198207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6915c78448cfbe005e480616bec829967d8952feb8b97c68f5947e274708cc9f. 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/USCGH2198205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6d41b30fe2b4965bb09265e33c99b8093bbbf1b3d58c619660bc5df89ab74f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGH2198206.
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 0x76ff5b42eaa92bde6e350e23ccc784f6c37118247dba8b2e6de640a95e8127f5. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USCGH2198201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b16b6b99f75859e3ff7c5bf3c12b86bae322fa0845e3db2d0447971b83d23. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USCGH2198204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3265cacb19ae003d4528781042ba86b50f1a43b4193a4f6ff8323a386052771. 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/USCGH2198208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce973af4b9925b7435ac570e7449d6828e653ea48aecfafc85681d660b88f64. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:50Z), 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/QZNJZ2284752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eabdc15931790b1e0d21d1855039eb9db07ac8f148982295cada8950ce9de8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJY2288377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a9faf5631810d09c4c28e6a1cda495ec9fbb4fe1e66012ca1eb1f944d6818. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJY2291699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa565928fa720ec7431a7c908e10b4b63fd573e380f74f69b6065ae3ee72307e4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMZ92358412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8254b9006c6c55e8e1aaad57328dafe43492b250d412b5940e24733dff84626. 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/QZ5AB2401905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d124fb1f9a9263549a9d3dc2d827f0dfa25306fca07f69012396aabf6d34bc6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2403921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5879f8db450ce94d4ca64c4cbbd983520c4740171713a0fea30c18b790b76925. 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/QZMZ92473539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bd43ac7fe8de0ae34a35e551041fc0e56d6d357687fa9d0fb1d74299f14712. 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/QZMZ92473479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e45cc75a78850925b547169a89f687c163220e3f81f5ecd39c39c74b772bc8c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMZ92409504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e61af8e262fab480b809e5c7205ade8321493fc7f5b72dd4084529bf58a00a. 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/QZMZ92473503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf509ebb6ec5616b1fd70806df0d6b3610bfdcd61bb35c862827ffb5918b09e92. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZW9L2352306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be02a83c8bd37a9e9f5204125d6ccac39fe2f3bcf683f3ece0dc4e9700a615a. 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/QZNJZ2435680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe987ac3f347f073dc0603fa41d12c32f349e9e8b102a614236a9c5421f7dc78. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZGLM2503471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c99d6d72876cc0a7e10d96b3c3c2deff0ee68aea4077d5037edcfa04d6b38f. 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/USHM82265214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690dbe235f47db036460e3e7dc5aa87d9264be95d374a4d64700a03128db4fa7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNJZ2353257.