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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e264e15f5322f70f76af6ffe1478d07953f1ed709b523a1fcba5a3225ae1eb. 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/4b4a9efe-66b1-4e24-bb2d-03f4d532bf1c.json and https://artists.proofprofile.net/proofs/artist/4b4a9efe-66b1-4e24-bb2d-03f4d532bf1c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07873d1ef1db17a6e229071eb62aea1d98de7c964b3005e7586f5d2fbfffa78. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZW9L2449520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d12d02c167ae1b17643b182bb12fcf9496d63ba7ab8e6e18e4354c09e96e22. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZW9L2449521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbb73eee659296f2f96b0236eba28986d1ef20b76e3152751e9c9f4d76577f8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZW9L2449522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e0d643d21b4839721bb979df6ebf84d7d7c140b1bc3fc6af3c03e6c0e88a21. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZNJX2162654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5648c9990c5de9ec8f7711d34ebb0ce6be1d2fba2296f1c5b7b60296ca9da67e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNJX2162657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e58ac98e536a1077ecc58b65580b423404f59ae22215265f68a17c40383e6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNJX2162658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d753539ff4c06b636c58daaaaafa790d29205f3c2f81bede3f098142d145127. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZNJX2162659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf93068cb65af9444d12b34c8cfe50a5f4aef3fe51fd8a1479637daf5d2bf139. 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/QZNJX2162660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfc8b1a4a32f272acef0f400c57cf08e7812807616df98887c0b0e324a55c61. 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/QZNJX2162661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3d7edb5ae8a48487ff03497f83e9a183789500683af6b905d84ca3b27ea6a9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BXGZV1600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbd3b7add3061b212eed62fb33b8a757aef2ac6e09cd04b0064323d737d2017. 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/BXGZV1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c5fe06b62b4a8116dc9edb25f18cdc72bc7f0a3a7d6d413ca5f7e33d723fc4. 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/BXGZV1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49911de0ce9476744a12caa4eab1c06209c576802a739ba52aa4045a98252539. 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/BXGZV1600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cabadc67fec9d2b4d8468260f1970a0bd0858d95412f1306b86f32a2b7b4f4. 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/BXGZV1600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5c703a3642957243f3faca0aa897a34999a688cf9cd07549c6085822f924d. 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/BXGZV1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d3babc4ae163b5006f375786e580151793568810f27ddc9c3845500b124039. 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/BXGZV1600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf36d4cf6767bbf108e71f302ea36c165e1a195ae74c7cb65c9ebd4e8a8027. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BXGZV1600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798945beb46933c4acc3b361e014bea2e02bdfefb6cd54fc7f065e0497e0a976. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRDMM0400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c892ee4a7a4b39a75a922a13147a462a268870b8fe44867c4c241d3760a8fe0. 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/BRDMM0400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6eaebe4a598dc28045c39e27f41ac8bb3e87e9f9496b5a14cdc862586e4429. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/BRDMM0400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04067caee4b6df9c8a6c605a5afcb5370d47019e5e480e0de5d11ce4ee4af267. 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/BRDMM0400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf855bb7c79fec71383c748e607b948574350fec5fb543963aa27df18ae2774f1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BRDMM0400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf923d4e4720c86ca8d140e12b454c30e7d66e5ce13a67c1a6f495e3587ec52cf. 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/BRDMM0400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51498488980efce6440c4f9b2d7b680922ca0eb0c44721c8169b0d3b223f473c. 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/BRDMM0400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd9b444699040a093e955c6d022b97e020233fa2263a699959eaf12d9b8a338. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BRDMM1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc691ff9f93ce4367701f5de12070f44e783bde750764f1f06868081867fd949. 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/BRDMM1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebbf74e55c9a67f72d64b14f0ccc146aef9b27901c3c28f0d57fe075cc5ef49. 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/BRDMM1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d04bc5c9b0761abc0e7c02d4bcf576789b5cce17c1acb6380e191129f97e3b2. 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/BRDMM1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba42113363d9a4683b93389d914688e1356404ec6b2f401071124d0a1b76263. 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/BRDMM1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2a91138b6c05caea7b21317a5cce55532b7483c65b09a6a1b3774320af51c9. 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/BRDMM1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b0c802037d9ab275b45e797560f8e6ad74982272a344fd2afb1fbe220133f1. 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/US7VG2128365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4149f5f380b81900bafc21ab3e2ae56eb10802f1d620a3632716148d286d734e. 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/US7VG2128367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820ee7a41f47cceed1dca52640aeb8f72b3f16d28b561eac0749f4d2f87a6be1. 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/US7VG2128369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b6a3cea8b1f74e6caf044bed3bd763132eb2c4dbb44f06b244856be7aaa3d. 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/US7VG2128370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dc9ef7fa654caa6ab4088cce68bd2abb88cc1a1a938a7775bd4a2d420295eb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US7VG2128371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf582ac9f5275cd9a5274139e4e30d344dc7126fdac23fcbfa70a2f1a1b311bc6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/US7VG2128372.