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 0xe425889cd7655c74799648d17fd0ab91b80f76d45f40d4f79dcd8b4435db5a44. 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/5cbdee8a-6b4b-4e8b-afdb-a01b491258c2.json and https://artists.proofprofile.net/proofs/artist/5cbdee8a-6b4b-4e8b-afdb-a01b491258c2.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 0xa6eaf15d1fe10328f324efcd2da714061f1bc7869552cab2043b0084ee12ae1c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAFQ2125808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c42633624ec2d913d6c9c54663a0b87a8d164686ede9d0eb7f387a6b001b9e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCACO1674909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498eed557cfbb3e104c3717964cb0aba07fd3e051407b7b6992b436e836783f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:51:08Z), 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/TCACO1674911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea6ad1ec63dc070a3053ed1e35bc349cbbc31149edbfaf7fefc6576f15415d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCACO1674912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29355f85cf4b0dd18b64b7e8d65a942655450ba3f89bc01badf1a0074a5bf3. 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/TCACO1674913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75da6073d603b1976869f25ba12a9b2f58e8502e70c61092a8b1fda11001b95. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:06Z), 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/TCACO1674914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac92cb84b03fb483a3085c99887ac2b2a3a8c7b9876baac5c24ca23d0689ff17. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCACO1674915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2b4485fcd143adc8696c22ab5441fcb53404ef7b9ae7e916e33ab5d147d99c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCACO1674916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b40d9b098486ca053b322f74a938281dad32e1de32a531612dcce4d93100b79. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCACO1674917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0846a0905ad844aa26cd173158e9cbbd58a40a45b2067796b2a6263c3ea526. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCACO1674918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10abed81a114242dd4eb908cc32059ff5830a24cad6cc33b79a29ea52ad74525. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCACO1674919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32654ba6e37bed7a28d6cf28e7dab8064ea5f611743af0d3b564c62adeb6147c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACO1674920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a264f03170547ad63a3dcd346a2e0a18148555ac4262c5d3c874129af1ecfc2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCACO1674921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e5a3c63eb75e7b9f677371aa244a316fb5c89b5d7a7ecb60925d23abd7150. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ISV441855404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f08cf933a690fb6e26f4c082ba8ab2f34555c2c2c07c9d0ca0b66e4fc8100f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ISV441855402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67bd8d3c42ac99c59daca8aca4a5e82767075687b52b68206d8a213155072b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ISV441855403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61432081fdf9cad172640b02ce85eb5b7bea665c7b15ff67e22cdb97f6527cce. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:29:10Z), 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/ISV441855401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a677e709888d28c5058aa8d6cd7c4eacf8a6f11e39fddd3c48317b2432e8e9c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:26Z), 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/ISV441855405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6ae74a24ec1c5c0238636ef029f09456072afd26c9d7af2873908e4abd4e86. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:54Z), 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/ISV441855406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b9e1ca71f502c5dd422ac66598cc1be3a6f285a76cccdda4e097a98550929. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ISV441855407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ccadc666dedec2f8d301c2f7c458960f5ff0fea902d01055f9a8cf79efd65c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ISV441855408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cecddbdf62cb335a2c2407ced050d5a22a2bc33948724f6b6642343c3abd61. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:46:41Z), 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/ISV441855409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8e79acfafbba3f99012dff6d6e33271bd8a4755d0733553783691f97e3b240. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ISV441855410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f363b39fa34ce6b9095277234c36d1dedd1a3eccf035639d50ba3b9316a0d42. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:41Z), 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/ISV441855411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3080d51a6173e2f8b5fd6b8de4d79452546183829e8df836f9848730dc37ed5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ISV441855413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2678ff20ba16014bb50e7d3039cca0cb569a96a96b0dd6dd27d8bdf5f9b2fbc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ISV982452402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bec43f84fd1f9f9245d60edee404687a0e91b6083906d15acf9e7846aa01e2e. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ISV982452406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247ba80e219650497470e2468ac3fc2512a4e6837e5480c9436211c20b48953f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ISV982452502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8371a270a3211c57f0f9167f2e3df2f0c2bf9cb8a347c5adc36e0166e4f3a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ISV982452503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771be93de88cc3349750c870a4cc06a1e12599d103bb3e95ed59f0961a627fab. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:13:41Z), 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/ISV982452504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3084e4c2e291a0bc8806d46c4ce6d5b0eb35bfe0aa04ac6811f06ffa80498dc8. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/ISV982452505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabb2dd3a4db71149409220ff645cc2caa15e3c9dc712fbf8076188f12dcaf1d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ISV982452506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5f94d3a6c96a2f5ffcb400adb9f8410c4225bb4edc3f8cad037fa7bad7e14a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ISV982452508.