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 0x4e08d2ccb9f335bd7b088fb7333761b97a88f423120ed16c3edde5b14237445f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33c6abc2-dd09-4d4c-ad07-abae385fbaee.json and https://artists.proofprofile.net/proofs/artist/33c6abc2-dd09-4d4c-ad07-abae385fbaee.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 0x6d71481b6ac3ccfc30c35fd34996a6672dd28f677e8aa407c97dd480e46befd5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKZJ72100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd11f5790c9d11a408c809e6c0a207b8ce08a6426669f217b4468b1f98f41a6. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:33:24Z), 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/UKZJ72100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda6f167d3758729660a3672c8e3eb3ef71d64963d8174f4211dc959fa0cc7d. 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/UKZJ72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74c51ff3a5cc417bb21b6876718cd39a297ab34e248e737fd2b6cfdac0ad527. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKZJ72200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841c47132eb7b30129090749b18260e78e0acd915f84fb9306e93adfe98223c. 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/UKZJ72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f550c10464918d1f1ea3f647f5b093e0320fd3b632cb9c9c3ed2d6936d6180. 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/UKZJ72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0324c70e1748d070f4bd2b89e95c9ec37aeb8a7f91961b1a0ab73ab859e56dd3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKZJ72200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec5430dbcf369552f3b9af7dae184542c62c563466ee823eb89b299ece0d082. 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/UKZJ72200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1037ea704e5d194cb81063e039b6aa2417653979a8c767614f80a354b4affd26. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:30Z), 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/UKZJ72201298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6131d17041e8d7550d25a7196d5704bd524ff97d3aec1371ab5fb25bacd1fbf. 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/UKZJ72201304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4c8447638ffb4f612ca09fec1fbad15b8d97c429e4d3add08ce8cf757974ed. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:11Z), 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/UKZJ72201305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4edcb8db2b071205e21a207c17a43430fd00e9454f35d62f0cb90f89e8a8965. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/UKZJ72201307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc1e4f694366df79da4f66e79a361c93d05772e87f68e0b7238493ca51566e5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/UKZJ72300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd48e6d877c9131a05b600896eb53d91109ff39e050f25fc0ef2b60391a7ce8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKZJ72300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd059f00fc0910323da03e366968197796076e85314317f966ac6cd6af84d2124. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZJ72300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5c49d04b5d172ddcddfe7ddd4914d6e33de2e5e0cc661afd8b4706841f63a5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKZJ72300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc778e4da39e52c12cc67d24e9ef7c6cf9847334672d71e6aefbbcf8e87e1832f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZJ72300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c523fdc2131339101ff579d986518d69fdeb0216d861542729d343b809d1cb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:27Z), 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/UKZJ72300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee09b5d8668bbc3cc33697807c31da658658beb635980e5215cde92dfea74c45. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKZJ72300717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20abcda250f08b3a840d303ed55ee5cc42ad0f39af91671927e1a8e29082c6df. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UKZJ72400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367c2efa5bf30e085d5d8ae56914a77508e1f266653e7769b2dde0e83fe1a078. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZJ72400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eb5e8ef07da6059edebf0c42d4e0d7619661ae3611d7de3192f949b01e26b0. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/UKZJ72400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f94a7b7520c3e50fdfd28a4c763c83d779a0da8632ab591e70a71d4a50ceaa. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/UKZJ72400974.