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 0xc786b3b049b6f0d381334aa680b6253b80180b9a128b472f405e917a4a8aea70. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d32567b6-fafb-4565-94aa-9319eda5f512.json and https://artists.proofprofile.net/proofs/artist/d32567b6-fafb-4565-94aa-9319eda5f512.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 0x446c9e093edaae17fb9a82b4dbc6beffd931f1d6a89dfc25373655cbb7309ce2. 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/JPE872204634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea33a3783ce6bf5ca6e422292103fa67b90710ffcf3c8e266a5625153fca9bb. 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/JPE872204638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60134a08e98f3ec5503163ee6694ed5276765f0f9ee5c6597cacb80ad464876. 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/JPE872204639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e1688c881ee902be1f4874906d451d8cf72ed4f8ed30b48c46897c5d0d9f10. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPE872204635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e487adb364b9c9dfd007a8681febf487e82f14d3ecf7c582829de75282c0016. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPE872204636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b74e4cc922dfde656bb7d620a4589db8b071aa1b05d6037d34001daad42e2. 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/JPE872204637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fffa60ddc1da3a1f73fcc1803c4a3e7edd285b68cb5bd177b40ead44577aa1. 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/JPE872204323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a60f82baf87bd581c6c82dca2055183b7e6858ebad54a1cf395be2293da5eae. 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/JPE872204324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d0d02a7cf6f0e8060aba9a33f0305221e458cd5b45ef345b1a4870a52ddc5b. 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/JPE872204326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7777481766db63ffc158a392033709ae57b5d2fba22a0e7d290d25df486c8a7. 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/JPE872204328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c6fe1aa806b13e2856172978e4b8d26bceda50a447e68f5a133febb9b5a207. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/JPE872204322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a99866e8938438176bcf29669b6b6871ca53b77a69695b6656918204d35837. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPE872204325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81c2305b1632abb188273747352da418576241400a9924c6b08fe015fcc233b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPE872204327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e1bf6c82b9c8eadf4d2cee5a47d9cc860c19d030854ccb4df65557dec0a048. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPE872204303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d150ae121576bc3ccb2f27a687270a48d1176d6da7f6abb28218a6f3414ad74. 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/JPE871903636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c63d1f94b699f7967550e0d89a29003c319bfbbeac6a7342eb3621ffb781e2. 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/JPE871903637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62fde9698d9e9d2d4629228096929621534897bd812f267facef54f05eb9dae. 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/JPE871903429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffc1901635e2153f7aefee2a9ed770093681113bbb8dee1db27a00d0bfd5745. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPE871903428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9febe8e5b614c36d32044e1b29c0c42c202c6cb5685b74d7f4b6bd996858b6a7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPE871903464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404c8be79d90579612c4ae0c0d2f5542bb7aad17a94c0e50f251f1b959451cac. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPE871903638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9724ccdef114ac7cb5a10e1ca73a1f95b875d1bebf190574ff2e98b5597730b2. 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/JPZ922404352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a227769014188c3cac685ad2a28fa965e82193d438b54fe1de9b7511384e9. 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/JPZ922404350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e71833c0f1e455268dc6912a209496788ed27d5e20e34c60e9ad4a205713b3f. 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/JPZ922404354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cbc393ed506711348abd5d398e8a1a1940e835944b29b02d7dd868e1a22efe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPZ922404348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ccb3c677ecfa22dc322128e3e0ae5363aabd105a10e99f3de2f773ea5d5803. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPZ922404344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acb1899cdce4d190516e3c94993d7d7d97059beea81103cc7b041e592199ed2. 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/JPE871903256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa770b0efdc4eac31bca24713292697ea2c3025ce68d10cb9f422e89255b43c43. 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/JPE871903331.