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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383bf499702c9cbde72a1a9951b2e55223ead287dd250d64c275c7a4476f24f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c555bc9-0940-4618-be7c-8e0b8ffd5d81.json and https://artists.proofprofile.net/proofs/artist/5c555bc9-0940-4618-be7c-8e0b8ffd5d81.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c6bc0ed75dc7a30ff3c9be0231002137743ab3dbbac0c017e4a430ec9c6176. 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/SIC030001601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd40126ad3c76e4fc3cb2728b0bcb77335b515bb5751b73ea57c78bc9218b64. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SIC030001602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f5ae06ce82691bb251139f917fc5dcab323b39abc91baf8a495a14e9c004b. 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/SIC030001603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa2aebb244fef4758fea3106dd60b664aa37054821c8cdcc65ea2221acf31ba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SIC030001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0e778c778f02b070e32b6828559149b940d23e4f808b203b82d19431bfe18a. 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/SIC030001607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aabaec3904fd7f6f14d7225b3f452008df43bcf477c70bb7b4d666016b25f0b. 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/SIC030001609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962987039f8acc534582af433f5fddd361b6621d09290c82adc40cd1fbd893d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SIC030001610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8061e74ecdd4d9a5611d71c02a789ea8c87c943cf1f7e4ffe34b8010888f7048. 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/SIC030001612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c64b2a36d9638705ba6548be5770157073f00ba90030cadb28e430763477b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SIC030001614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ec8705ef2d2777aed51e16284536d877daed6db9145d982eb1ae844e58759a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SIC030001604.
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 0x13cd37548b0b8fec8f1a82156f69f48d71b25daf0263ab5469a57b2ccf1426e0. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/SIC030001606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43caabdee9ae0170568a8dbee9d423994730fa94f3e6a96a4743479bca03a40. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SIC030001608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeea8d0bc1040ae6f285f1693837e0add95bbbe66eda41878ad665a3b85029f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SIC030001611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e746e6c1c0e925417e4268996608129a6b85acfd68e58a923365b2cfaca9c6b. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/SIC030001613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119f04a5354b7964b4c6dc6c9ac4ec9a66602e435c952b787f95ef75ef84bd34. 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/SIC030001507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f336862c944fb6ebd4678f055858bc7d091f461a997e4cbd5a9aaa157746b07. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SIC030001509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cd4dce3b0704ab728798a5c86ad997d056b13978d28c9190f3a61206bc9d0f. 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/SIC030001510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe00840a1639188dc8800fe31a091ee8d2228069d453cc79588e9eece7aaf9. 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/SIC030001511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c30a5d97ff6136227fb7f526ef14357fdbe8a6be68470c6b4df88936d8bb94a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SIC030001512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f38ededf78934e72150ff33c6d577c701df5fec6d96ab9a284199a75e7c6822. 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/SIC030001513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f84a580d8f0d3d24a8ee477408f58bbff8b2fc47de10adb3c2fbd670529acdd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SIC030001516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889f4334667d430e9a9346cad290c11538bd460b9f2c1f3bdeeeaa2f9b5b58b9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SIC030001517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecbaa48c3b131849370da445ae451f2c94d74521ef5cc88593391628d17e8d5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SIC030001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabee7f0db0ac6d3cd23905f8806e43e905340d9cab1b5c6de9b4cb7880603fce. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SIC030001502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026cb3e8bdb596371211d770464848f2c1dce23d0038b5e2732075c04e83dd4. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/SIC030001503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d96763e52513f85ae158e1c2b35f2ad583983856d024e05017f5543282d1778. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SIC030001504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f11b14f261cb84baa3c20d250c5b84775d8cfff5ec5ebcf44ab41918b3495d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SIC030001505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6f585596331db34728a2ff9d4b1ffc09472d9f567638531bfde704fc443eca. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SIC030001506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5a946f6decca17ff46395be9f24b98d9a638388301eb3b38b7ea3838417f29. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SIC030001508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7ca34e373a000679104e4f0bc8733a4fde8d3ba63566a0c0dd8a9cd59feb7e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SIC030001514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbf16d54eb5efc3b3b3729dd2e0997f6d41867d286c62b723173d78a4cf18f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SIC030001515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e91ae99c212b23319ec448e80c1569a9b48e43e19cd6d4a8415abef50b695d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SIC030001518.