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 0x1b0688caf102c067ed77ebcc6f0922f7f26383a6afd18603399565eab327c8e7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08397350-5449-4d4e-9fcc-a0be0a2cd0fc.json and https://artists.proofprofile.net/proofs/artist/08397350-5449-4d4e-9fcc-a0be0a2cd0fc.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 0x0433f09b2a4588f4812d8ed4292e2703c729579bd6506d579cf865ad080c6649. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWU2120802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2438b30f943306aded931724402acb9bd6817831ebfb25467289dd5e607e63ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWU2144506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87130a60f684376204da52714e80046fdb04b59aedb3faa3def8d0934af3ac. 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/QZNWU2144507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df0fdac0b424a63168cf014411347133d3498215d4bda7b6afbb1025d6efaf7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWU2120451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf4f8663693fde1eee70ac93ecbd37783ad3f18f16249a292c040249c3e269. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2183449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbac3398348fab122c7a4d9bfe7c802c9b39dd4a1d5d28e661eddfc47c2efd6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:24Z), 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/QZPLS2183453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b246a6af009222a99c2c5d322715eeb0d739a4b272852a63392d1a1e6b3944. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHN82218874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9427d7999ccecff10b711a6e83c45580d44a7f09fafe3d4bc22e17f37d6ba2b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN82218880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32103d0fb7b7c40adfcc1df55ccd1b58965add348d3b638d25a4a8ace6cc305d. 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/QZHN82218883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef234a3a4de305212c643f28cb1105b8c952d4047a9da2160602a0e4abdda29. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZNWW2230486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d61a18b99c7f2f74511d52250a90a55853d52cf4af357d9c90ca883579043. 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/QZTAW2275431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7cd573dc690f37bb30c628eef3fd8e45693ff38439bb1aa82e971074266c2d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAW2275432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e45fc0de57f1e4fcd92084eceff6dd05e5b087ba98052a7b5e1513cf9efc3c3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAW2275433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1553bf06bad9fef40f6a6c576e8412a3d65ef08760dcd98fa0815c0a31739c. 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/QZMEM2356617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c423442eb0452fc7b2ab7313e7e67545c1b4d109a19bcb911d56ddd19667d3a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMEM2356619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7eea8ea82cae9c5152fac3e86f5f6d7159e67d73b9320172d9fee288de33f9. 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/QZTBB2454320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb507135693dc0b09d58e1a839f35f2594a2491de570b1dce7e5f623b1f889b31. 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/QZES82555710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a009d1878a82b3a4c0e349317ec8f2f8ed352de1ada456d7505982de139f6ca. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:40:52Z), 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/QZES82555711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374b707deeef0d4fd5173525f69a57b6061cce9c32f9dff6b997981f53a50e56. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZES82555713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be161f6d8cca9990419d6291cc0823a342e3af6118742df28334de070ff353d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:25:08Z), 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/QZES82555714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac3ea2f39cd6d4dd954da18c9106e113d000529efa595c43b31f9bd6f0616f6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:23Z), 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/QZES82555715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5470f6f6e52a15c7dc61ba369e49281cac51ffc0632d6dafa0903f0d3444c4eb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:14Z), 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/QZES82555716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4869fb28e10d83d2e4d0c7d569f5a620132c29b43764409febc822eec323b. 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/QZES82555717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f50867a159507db5aed364919cf36937a630a76df3d081724ea5cd155eb2c6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:06Z), 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/QZES82555718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8431156682393cf6b29d62ae13b2e0ee8121a6d0f100d3c4f9946f5e6bba49c7. 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/QZES82555719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf60a6789d7758f7eb51fe6c437ef85955e5f8ff85d2622b20e1f03f8d4652f1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFJ2564970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012ceabb301bba499d76b12f943409c0b831e30c32066db31fc34ee90e3f5a2e. 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/QZWFJ2564971.