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 0x2a2c99786a96fb6cdd27899c87cec9d4a2ea75632a9133d47cfe0938069acbfa. 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/312b845e-9fe2-4416-9586-725029f83b42.json and https://artists.proofprofile.net/proofs/artist/312b845e-9fe2-4416-9586-725029f83b42.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 0x471af67996e2dc665a99014d2e2381172144e43752269f7b1cb9f218b732dbdf. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BRUM71707656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec1e8fd5945d3846529385ff6108ce67a4e1ba7524c94e13e1e863136a18f2. 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/BRUM71707657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975ced9fd06303a8053ffb71e7246889afd8670611f7b41f75c2ad578716dc29. 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/BRUM71707658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05237f251f142cc2b9b879b115fcbb8800daa5344446f73a351ab8e887c9b16. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/BR2501600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce695879a01f6f38cedceee687bd40967e54d8e5d2c04f0203036eaf5de123. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BR2501600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e44111f7e1a4490afd07a00e0665fc08e45c2804f82f497d2bb56cc2cb0d7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BR2501600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf3aa63ec4a2cab78fa18efe83fc859d37f618ddf83deb270a0ff3b396b8583. 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/BR2501600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34d8753f64b35d17271bbda7606917d3a9f1f0434716b2d514c93b587346d54. 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/BR2501600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57070bb6a8be229f1cf00e6ba540a45423b2fe08ccf306aa14e4f358b9f79492. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BR2501600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb91c52a677a3151373c636c71a8f6173f10ab389f715d2c6435a6bf41156415. 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/BR2501600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244f1e601e3095ff66a734927dbf8cc15fa3d3aa0534b88c9e603d5e2b968d18. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BR2501600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea46b478480e5fbec257e80eb6620bc9d25bd7f1dff342dde714537acb5b9f2e. 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/BR2501600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d7a978d1f1f7e95665b766907ff36c492def52ae67f10e7caf537262f3f56. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BR2501600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b0962601f944a7a9e9216205dcad4de36bb61b727c5ee37d0d8d7a9a53b14. 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/BR2501600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc923bbcd9092d1dce917ad4c1c481ac780a2657e290302f51f825c6abe80904. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BR2501600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aadb135f9dce528ffdb9fd1096fb3986cb30967899864eb74d52b5136e8e34d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BR2501600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf934c918dfb3b1d4fea903f96f97a236b845bc27686ba0f73d443a66884c6d2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BR2501600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d1b9c179c52fb74a2b9b8a9383e6e1c106e251adc3286f3a8d4aebd0344cd2. 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/BR2501600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2955f6c5ec42a4b274f3171b2e9c4e9ae588fbcb4a2ded7a3c7e36d8716a60e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BRKUA8405702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d88a20d3db6ebe86be4a82708acf8cea20531c2848a9e1725194f9d992c48f. 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/BRKUA8405706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b16566a65742fdd319653690ab4ed57632cbc8cde31ca92c452f9acdcc5ad. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRKUA8405707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee03c78cd1f2999e8e5e42400998c7012e6358cda36f74a6bd3177096768c16. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BRKUA0520403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df114a12b35481322de394226c5329ef9dc1bf910578c3a14271295a3cccd45. 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/BR2500700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be66e87e7d171dd24ee807e3924d5eefc652607ba200be15cbbc38061ebda04. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BR2500700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d500c800acff070add318ab55267f19b91d5286b60f6592759d52a967428c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/BR2500700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4356b625a99f6575bce864c24123fed924bad30903232fc20117364b8e0b65d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRKUA0217301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f255d4efc2f9fd7d755f1a4a87b723c33c82921fee4db06842e035772158de. 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/BRKUA0217302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741acb78e7d5004489ec4faa935ed4cd6f9839d06740d000886ae6c6ab92409e. 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/BRKUA0217303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5669007c13626c7f700456c02c090c55880cbe94abcc92c4f7e78175450e4. 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/BRKUA0217304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415843384d0a844a2f039c47de9bb1d446e6b7ad4ee2e9ef84f06c9da7845b0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRKUA0217316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0e5309b6a2467ad9abda62b406b073919f2f2d9de20b41a7f3139c2f5b15f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRKUA0217317.