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 0x36f12bb8986e7262984c409f9ba7a7a440a8da05531dee4c4a77e07a580c5f3a. 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/e20b168f-23c0-43d1-bf48-fdc4ae09926c.json and https://artists.proofprofile.net/proofs/artist/e20b168f-23c0-43d1-bf48-fdc4ae09926c.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 0xba816b145b9fb9eee84a9cf14ded51e75f37d1cb60ad0764318116f1ae00984e. 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/TCAIC2402056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba816b145b9fb9eee84a9cf14ded51e75f37d1cb60ad0764318116f1ae00984e. 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/TCAIC2402056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640bf90897887ddcd217290df6f32c2c5f70420472becb94eb4d8a72c615c526. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAGL2286684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a5d7411a53cc64a7bd4fac8191c3e4545d834d7f368ef2e5d8fe1eeaebaab. 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/TCAGL2251434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a5d7411a53cc64a7bd4fac8191c3e4545d834d7f368ef2e5d8fe1eeaebaab. 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/TCAGL2251434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69d54dcd89c1ad846fc88111ef6e54585be6b55fd024fb8907ab8524012afab. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAIC2448306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc225d9e6f8bca3ad69e231401122a6222bc2c16ea18a89963fbbefcbe362cad7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIC2448297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9950cf55c6d51346a4d39c8db9b4d7f1d05509039d936dccc2d9c9c83d26a8. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/TCAIZ2416206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630878bbc5a91a63812cc3c2d7647d254cd74463b2b2ab3940982fae63251694. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAGM2209814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61293a33779104bd66262e7abd03712121eb1fb82db7ccaaf452d5d5810957c4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAGM2253165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8384fc909d1afb64b81d824edb3471e7c4b8bfb65534e85bb041ab01b3f6b807. 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/TCAGM2282228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e994abb9d82aab09547f369ec07a25534edd24b42c5096cf719384faf58dc1. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAIC2448308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09729d153cf5aa1fde077e060f9cdbdb68402917f1e3ebb61ada7129c81756. 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/TCAIE2448307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1480124e2985023870c3c036452ac0683cb0de9c2e5643c68eeefe0254bc5ab1. 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/TCAHC2385769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ffbd2cf50ea8364a17f824191dd17b24525b5149d7260a65aef7a2be87a95f. 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/TCAHE2323469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163bb284b5d8737f3a8489c3d12b95a47338886c56332ef89725e75a721783c3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2387400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe608b61c342c1527e3a3df2355357bcaafeddd1ec219e2a9cc9eb00f11de22ff. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAHH2335657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263064eb1e3c0a3ab4fcec0e6be3b0aab6416b4eaa0f09fbc95c230054341afa. 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/TCAHP2326400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5edebdbc921a12cf54c85c2c44e68b09010fdac0f45d8e388b8206e19848a7. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIC2428114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b7c67e985aaabf0940dcbe7375a51459b65dccb764295c131217033d16b172. 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/TCAHR2379522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbce519f30f45d09b0125470dff07f8fa31fe93f0c5708948ccf00626ce966b. 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/TCAHT2318682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fed1d62fe7155fcd99720a178872e4ce900e9c38e47ced677f5942fb932887. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAIC2448302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf4f0ce7861fb566a10ed0a07d549388995de0126704d0c885501ee47c7f055. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAHU2460152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad329a4263a1b100ddf0f8630a340639e6075c6ddc3f576f0663c9f93dfeda7e. 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/TCAHW2444681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c735361c8b638cf10bebf8f14ac730130f25f2d2e7feb58589cb23a7a6d33e8. 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/TCAIM2404713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0772135de2fcbe155657419a03c476836476af68077ca13523ba3224b3099cd. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAIO2405826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48057bd2d491a961f0193fc1db00e569138cd8f243d45c9603e413c41b29d741. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCAJB2475555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287bb6f8ceaa1da2e1349c0f1d7a114a13ea64a2fb9e71d679742c0001769316. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAJK2595711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805bb4ffb279bd0d452260da0183bcbd607ba57a892a22f71b76625bf9d91d3b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJO2522995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a998b5ae83cbacd38ba2f0ff18abb05aa7b1a3072780195344ab3c4d12f1e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCAJQ2537408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933c3ecb7b9372687e61b49f1437b5660f59189b7de146dcd924c1c5de59c3e0. 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/TCAJR2537444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365c81a7c772ea5ffe7daafbc63da49abcf032ac711e3a9e4fbd5e9c1101385a. 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/TCAJQ2537522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb243885f46a0cf6fc19af7cb9f33503e67e6e5ccfa4d167c7f59e21822b455f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJQ2537539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01cfb33d62670baff06fc3660439fcc1363067d986a6ebda3ae7df7aa834d52. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJQ2537560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7bd1a2698c38ec27abc454d6d445cd5ec3b15a98e9d3a270c09cca2d8fd3d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGT2554980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d0f974fa4f8f848ab48a0c1b9ef1a3a164a9a85ad44ae6c9aaff16df1884d3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUAGT2573255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf08d91a0eeff9b5c1415c2bfd4e5a7242dd9803dd15c13c00c244169d7309a8. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/RUAGT2593729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840acf7e191eaac3976ed5b7eeb996b2778010409ee343c1398a2763053bddc8. 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/RUAH62516693.