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 0x05863defae859fed00f38285d9001c7671826fc8ccc10793f84a9350c51f488f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ac4a92-5171-444e-8c78-11e943fdd22f.json and https://artists.proofprofile.net/proofs/artist/a9ac4a92-5171-444e-8c78-11e943fdd22f.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 0x3f1c464359c55f676ebd1d5327a18c8fd2891ae49e2fc94b78b53622e1ada85a. 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/QZZ7P2568835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78737e71e154eafafb68b6cbd3ea9a490c38f16479bbf769d415f2c0997424f3. 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/QZZ7P2568836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50fde0b34ec881e4a6c45710aada396ad942173323e3a870223dc79dfa194c7. 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/QZZ7P2568837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de5549039c31b0efb0950cc6f2f0ef1c06a6113051e4b28b2a0a6d528227e8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7P2568838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb0541ed9cdfd6dcb41e750a82e8a73efe86f4a1ade7fc7c303a2ed2f3e4648. 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/QZZ7P2568839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b843a2376ded3ea8fc98a21196d76a498d2a954d595a4f4b08fe1d71456d6d1. 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/QZZ7P2568840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa540e89ec93728911d28dd37a4f1ebf56bb89a050645553d2597e262d0983f9b. 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/QZZ7P2568841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eeb64e018ecffaf3ec09fa2c6f3f022e3fdc055611d2e94e26693416c156dc. 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/QZZ7P2568842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb790530a086ed7d455a3e69cd68ea83999edf8c88b264876ad8b6a4930386c. 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/QT3EX2595241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7f79dba7904aed28392da55a6eb5db4015126df7fd7211bc02f2526b6963d. 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/QT3EX2595242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c45471c80a7d370517bcfa2f66b1100d6bbde058c0c4d37d51875cce60797e. 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/QT3EX2595243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80254e1fa50a9c4b120c4ae586c4786c38604ab3a7c688a25a5e56c1542cc7. 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/QT3EX2595244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24df9181147c86511c20d9f4aadea242a32dac6bc4c3397f7150148a01d7e12b. 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/QT3EX2595245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8171410c5ad07beb7a5b1e38f78e94a414c72ca535b185bfc0111e7e8a5b5fe2. 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/QT3EX2595246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b5e25772719bcd77363617670e074027c05a199b83b70e5f1587ce390ee454. 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/QT3EX2595247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64bf88c33e438112cc954af2a35dd108e59179b47bf879f015a67eafc52a266. 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/QT3EX2595248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd12f80b2a4226ca767ab8522729a94e66a24558618251f2809b3f9a297f7de9. 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/QT3EX2595249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719ac2d2901cab779bc432e70e1ee72551ef1f5de02738e06c680e0797c2329e. 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/QT3EX2595250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3aff682148cf8377cef86bb6e1ca7eefffc944bca08f03904367a57163c920. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3EX2595251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db5916cf3a4a4d31c42b1190b180b59a15b6d6e4d302d68d0c90ee70ffb90a6. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3EX2595252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0dc83959ca9ca361ff6bc35e04054f7d3527862c1fcb70f89edaf15a7c6c45. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F42583082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bd8979b18ec1276a7f2dee6a5a129ff4f9ecde593a3e09425fd1d909a12ce4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3F42583085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137f23ee40d5485f477da9d9181f22868ed0254d8ecb68469636e82c07785d78. 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/QT3FF2595971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941bc49c588066219332b84d8b2bb07a2c5fbac2a6c67f00c7791295f3bec86b. 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/QT3FF2595973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a315d7ad3c94a892ac31ebe17530a4716c120f68276ea240b7eeeeeadb4bed. 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/QT3FF2595974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cdbe43b06cd58639f62f856ab0529d21c298e4aa4cabe9972164ca3ceaad64. 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/QT3FF2595975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fdcc8d9fdd76c2df8641b2e01b910b6c4d6ed5dba92d92f2cd04307b4e2fc5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:31Z), 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/QT3FF2595976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4bcef17e55e0283934b93375bc7f174043547a2885252830fd109f42b451dd. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT3FF2595977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86985eee83ceee40cb4603c43893e6a417e40dc1b40882675e86dc8764b80e0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:39Z), 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/QT3FF2595978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586fcd00c377efec2ca48b21152dda34f3b3beb791cc78a337e28c42dd82eeba. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:44:16Z), 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/QT3FF2595979.