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 0x71f9d0d60fece3c7ea7eaae9979a6da9555cc65359187a236fbbed34a2f1e095. 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/c2266841-5761-4826-bc1e-9c531ca981ab.json and https://artists.proofprofile.net/proofs/artist/c2266841-5761-4826-bc1e-9c531ca981ab.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 0xf461c29d4e0c9ac2d6b083de7c05d542435e0d42eb39ff1a0a4d295308bb1cb2. 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/JPZ921903529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ee73b2a82d56ac30536f7e88895477f720b44f9d0f93fdb2a8a02e80660d33. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/JPZ921903537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1183c62d5bd79054ee0f3de473f852370efc6ecd01a2444f290952a77cbf6. 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/JPG102000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce24e2d7e36c5a703cdf422fc3231f510343293d35b32ff1596584feec88c61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPG102000870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd452161acd9132ea18a4885d0002c205b1a2dfb5299f60c861bcead3662bf5a2. 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/JPG102100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d115d63a8399287d4b2d60bbdf05d8b7e8271fce6a707eb39ce8c76495ccbd. 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/JPG102000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe644be18e14c8df092c8efd7708ff7b9d4b24a4a829f47321bd46cebdea2b9d9. 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/JPG102100830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900325578c53e9b51255a05de3aa95d55422122586503dcbaadd8a157a39594c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPG102101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e23c57588d3c01401ed71daa7e055fca3a8d332fd4665413cae020961f95a. 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/JPG102201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a358a64931ff8c8e33cb820d3d6f29012984acb9f64736279001590b299b62c. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/JPZ922300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3583035bb3da2eb98cb2a077f7889658cedb62082e0777bbeb03e3a0cb703d. 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/JPG102200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13623d7dd943832f3054d4bc1f3ea0aef5f36936eea532dd5119ff227afa890b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/JPZ922300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a358a64931ff8c8e33cb820d3d6f29012984acb9f64736279001590b299b62c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPZ922300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e23c57588d3c01401ed71daa7e055fca3a8d332fd4665413cae020961f95a. 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/JPG102201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9676f4a9752cee35a0a9671129dda926ea4b031f882606a4a485ea9b46c3e3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPG102100956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143896d7b5a5fe32da4d6cb504b8180120bf50a9d9ac19c57bbc4a636c2e7dfa. 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/JPZ922300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5772fee6fecc1ac0a58c080c723f216aa8ee2ef25bff2713e6207dbcdc490d19. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/JPG102401987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ac0f2f855e4228651369a1ed0bbdcf1a5361e9fbf6716bf83ef7e146bde5c2. 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/JPG102402162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b7741a42e28cdc856b7740ab3929b78198ee50c0e3e776192beb69c230b502. 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/JPG102402163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1eb01de726ac1423237b637041c208c0c67e5bc6298bf8e7e0290983c132db. 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/JPG102401375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31efafb7ef8094d7d459a920cdb31e0933ca531115d31253362524170e522a3f. 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/JPG102400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1525c70894860bc1a184d400a0cecf582218215d1d2e036c3785b7800d14908. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPG102402164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f818d3b62c6dceff7c48dabaabf44bffc2a7d33e81dd49986aeab422e81ae. 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/JPG102500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5772fee6fecc1ac0a58c080c723f216aa8ee2ef25bff2713e6207dbcdc490d19. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPG102401987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3060c310005d4a711c1a5500232d1cd97db1e2de88de0e14dd56d3cdb9cdc3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JPG102500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97b4b12de5b0eba93c18b0c06e950925c35514002e28104f4ecc458a82984b4. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/JPG102501139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463ef24602ba989b85ac8d3cae337b0de87c98bb2d6afc4065c82133b35b31ad. 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/JPG102501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1079b4e4a1fc8e4c46c53388d90600c4b725ce043cd3179dce4b8efade81d738. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPG102501141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e2beb226e726525b15e8eebec928b484f0668adae861289f76037bd52c0d7. 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/JPG102501142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0630d9dc8423618ed3fbf7da14a7d41b9299fe40b7f31789cee9f5644ef84d3b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPE871602023.