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 0xf57894a05f56048ca2b5817b0b382dc37464d41a0db8e4d7423507d0304f4109. 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/2804356c-2c0b-480a-a344-ce34785f75eb.json and https://artists.proofprofile.net/proofs/artist/2804356c-2c0b-480a-a344-ce34785f75eb.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 0xd1c596692cccdd76f3e78cf49d53d16cd1bd0c5343aa6ce586fc6ded17724a10. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/PLJ611300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34758cfe1f829fc4611ed882d2b021b193328f7a32f996aab2c580a25dc5c6d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLJ611300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bdffeea1aa62a82d2c9fdc96aadb7e7a8a6fc775b14256986adacc7f13d4f8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLJ611300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a43364d3ac69d95fd49a2f73f8213071c27db5577781373048e008d4c376e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLJ611300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c66179cd35eb9a2455ad87fc132c600ecfa980d95e393bec601d4385250523. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLJ611300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dea8d537bcc88d3c685ed55f7f7eced0cd3776e66d8d009f57ff375a72f395a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLJ611300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11e50c176420f1ba25dfee5c8c60694db0485f5a82f911a9d33aecf63c6d574. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:17Z), 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/PLJ611300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120c5e5dd8cc65942013510a37afe2a22f0a2f55db3eabf6f44c6c08b110483. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:16:26Z), 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/PLJ611300017.
Stawka wieksza niz zycie (Jerzy 'Dudus' Matuszkiewicz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992fdc05a00763fe9d1c589511ce7c2ed63f9db1123f663124b28c3d55c79f36. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/PLJ611300021.
Muzyka Filmowa vol.1 (Jerzy 'Dudus' Matuszkiewicz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dde6c7397fe9bcc1b13367871075b505d7be785cc14dce12f5ad03d54d58fc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLJ611300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a8643e1df6d1e8034bff02b7725652801198a76ae8b0604336c0abe915f38a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLJ611300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d84508ef8f432c375b4980174d1f050c7fb201adb6e92b6049dc65b90c3d38. 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/PLJ611300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1826204543c730b79fa60506af45d6e4d232581ba2c4ec48426f3e6a0e1b2b1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLJ611300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ffb2c9552aa254e63a6bbf3d33881107ae332ba960941486a487a4f7e3d7c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/PLJ611300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649997dd4bc0862147a89bd460ff1e91ed0f4bb6e94a0fc234b6c1cbbbd1430b. 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/PLJ611300042.
Stawiam na Tolka Banana ("Ballada o Tolku Bananie")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895dc56b995d52af6c3965e1af5f9c381f2c9db52bb6bbcf8f0754ada22d506. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/PLJ611300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f41f76699e6471787b99de6e997169f6ba9e5e3ef462dc033a567486a1c0a0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLJ611300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4781ab4a3c1f3f26e3249d165234d95bbf885315a5c378b4f30a5bef80585593. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:58:50Z), 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/PLJ611300048.
Muzyka Filmowa vol.2 (Jerzy 'Dudus' Matuszkiewicz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2051cb17d334b729f58eb7bd4232e58098eb43a387c9dfd57cb8e49446a001a6. 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/PLJ611300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a16a47321b2596b1f91ae3a96446016a158417df421e72477a0a0de07664e0. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/PLJ611300051.
Kocham Neapol (Jak rozpetalem druga wojne swiatowa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e0235db86b2fa8fac6c6783efb3a32a559d9bf51d2b21aeb9940ce4f77f593. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLJ611300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f950b8c079da30c7642ccd5e2d242a63425e22e083b76cf5721b2ed0dbd351. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLJ611300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d261e2121f6b4ad603f04714d81a9f51d5da7e4dd59116f3be43ccee601a4b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLJ611300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef16e7112e1925877c06b8beb965d0ded14607d192b943244196fb193894b49. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLJ611300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f2228dd786404e207c65d145256fd94897bfbcd01e9618b0d6b7f6cb1f9985. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLJ611300076.
Motyw przewodni (Stawka wieksza niz zycie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1992f16f2e4fe6e391bb95d20436e5a575c6a926755a04dd1aa5fa330fa713e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLJ611300077.