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 0x9e2170d41320c80db887b776f95301117088479bea112e568f3738576cc0dc87. 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/4e208c83-05c7-4058-b355-4efea644b98e.json and https://artists.proofprofile.net/proofs/artist/4e208c83-05c7-4058-b355-4efea644b98e.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 0xecdbf163037623d0f210354de67bc947048247421b566499234d95ccd6907f7f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/FR96X2548579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bad0632e652515f43a84b4d0fb66def569760a9b1d0d461b90605e6d67a120. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR2X41474179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5110ca6a056513b4947b64584b50f259fb5cdb58158b34a05d78e6022632e4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2X41474180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3eb4b13e9386500469e1f8387c2e20b19595c064e7f3bc471e939ba51342c4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2X41474181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ac500965988dace97b5e2aca508bf199116aed0cd60f3c2c36219e6812f65. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR2X41474182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be5fd0fdce0645881572242d75986b210a03c6de604c2c113a80fb520822ef1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR2X41474185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a3b49bdbd1a9a6040c9e3fd70c79f471498e8af38f254b25cdc2e8f731cd11. 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/FR2X41474188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f31772cfb92d308cc9063461394067d917c8897ff68e06b77c0e3003dac9a. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FR2X41474190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1493693b10dd069cd3838a5d3c968505141fff1d548ded34dfed4c4839e334f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR2X41474191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb71ea3eaed90c24a6836c830505a842e86e8e6c785703f277f2d5c0a22267a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR96X2573515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15909380482d58a655daf7b3555b2123b4a9b90850dd6e99b049e4ca4de33888. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX451555191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2108dbcf7cf8abd456a97f001323e7420879b449bb55eb06fee86391195bd0c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FRX451555192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375b4ea99dbe35fb596a5cb58fc22f54d770b1c9bb0592fac9a20be20f4b9434. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX451555193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e9c2902fc862b86ba267cd735f809d0fbfdcc0bb9be5befaab9056a2dd763. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX451555197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe4f9ee39c332c4ea569516d1ccfbcd697b5c7436b5a8707f6b36cf5ff77feb. 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/FRX451555198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ffc03ee9cdd694d3d9f2a699bbe1207004b60aea20bbbe15acfea6ab1a1e1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FRX451555199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62e4bd6df2323f18330e9ee2a911dc3dfb10671bd694c0ca64255536e0489f. 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/FRX451555200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e8880138a6106d80e683100da1eb0f85ffdc286d0ccc13eab61ad1e8b76d8. 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/FRX451555201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc16bddccedd4ff5d6d8e0161725c1438c34c83633d1361a218f6a450a257e3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX451555203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f31cb6f78bbb8b164ef4d159ca7730bc16247e9d9059052ca8ff32a5bbe078. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX451555206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d21ecfbc1c2efc7a89eceae73bd3e10576459b17ab7a51865d8a757202c1834. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FRX451555207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af49dea5876ed8e926bae08e1912df90aa65c3c3f4b0aef44dc8f68673f7995. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRX451555209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161c1eb8329992d852811676473012df0ff83c5c2ef2a5793ffb113ec497f057. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2X41586613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebf8b331c2590b5b1c55964cf820f172aaeb3c893530599ea36b48aeb582e63. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FR2X41678486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbda4693cc6e791a810dce7b6ebb9cd4d35e592989d6e39ca5eaf3ce43fcc0f. 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/FR96X1609183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5860b59c07168a81fec2878580ec0f4d3f0fc6a09749738d7a4752c8cbbccdf6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1733341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bd32328ea5c3f841527ead3b931968d123fcd03ae33c84fe26fdcdbaafdb96. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX201755454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c39f8211a51424835fe063ec028694cdf6a872dcad1bc7ea36ec3b6ee723c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX201982091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84df66d46588d15dc750136a5ba22c676b9a2ccc32d64ba52874a772e1fc3e22. 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/FRX762106445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe337b976d73d5f1e85f5160f68aa0a9995d1d6cbabf547520ad058495e6b2f97. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRX872137708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91295f5a0ca43bf5e4a115f22507e886afa2a554ab6b3974d40e991ae783bff5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRS182147733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c6a2f8ea2a2347ea2ac2cdaa40345d0c079b249a80f1181f5e1c062551ba7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0P2313173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a1fe5b7781599aadad8ebde58f90f3e71ea417fcc7ce71ed4246a9599ecfea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42367128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3110a28ed7aed4a3b2c2c57a08bab075aa08e1c4fadc441d6b6bc81f3791d62d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282114482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffaee0d655d267cb76c4dd0a86628543809df1f0ca3be260d0434f5a60198c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X41950300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c1b75933dcfb44645c0bbd6e3b42964f3038a8bc0e17693374dab9870ec5ba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR2X41950317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b54c81810b6cc588f3daf7d2394805dab3b8bf07de291fbb9b57c3c1bad4b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUB291200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665ffc521b7b1277428a8d2acd9d22ec6a310ee40ad350b12303b49aa4fabb9b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HUB291200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0626e74592b17b5a8d133d4865614fdf3f82045a14ef516bdd8394ee7b7d31ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUB291200261.