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 0xd3d0ed15cb33c3de58e5fe732505a552db5a8258f22504db5d3e082c6233469c. 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/3473b051-a94f-4a7f-9e39-f4966faff423.json and https://artists.proofprofile.net/proofs/artist/3473b051-a94f-4a7f-9e39-f4966faff423.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 0x8e1a68cb14d262bbfef784e9ca39b64c3fba42ba12dace96045295e0fcbced03. 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/BRKPA1800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841b3995da2f1f51a74be90d26a7615d24b949abd34356e24870b79abaaf6058. 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/BRKPA1800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354d914180083ab741635fa2ecd540e2abce58b3d37d31f2eb955c051078edfc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRKPA1800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7469c35e59c18b18f468880763d6e6b42b1f8b1c35ceabc1817d9815a6bce4ec. 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/BRKPA1800195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9595a10d513aad0a05676efe2f9895d3a073ad88b7e0c2ba4517fce4a144b7d. 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/BRKPA1800197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512aea3c21317ff9efc419f2b1039f8425fd6c0a0faaa27233219f9fdc7bc82c. 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/BRKPA1800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4271ea1abcaa4484ca83b88b75420f99a8c17ad242bc72b4d888850a9f58595. 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/BRKPA1800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05ccbb584968e3eefc426dde80de9e758142ec68bf766f573dd52b1fe67042a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRKPA1800189.
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 0x4b9af5dbef12a509901f3302e147a51e8018359ce5f4e67740c19a09deffc756. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRKPA1800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619c6ac1da4bf2e9608b9cab6539351bb2f0e4c33007aaa420bbed1763fae515. 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/BRKPA1800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978d141617955cc8015dcd9680e34c69ad1ac20ad4bef005aea7d87f0c2d65f9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRKPA1800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec99a9c4e3280f63ba5e2d8d433858b6ffd492894a63b74c6ea9032dbdabfbd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRKPA1800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e21f2ed48e208571321e7710862d56b67660dfd22c980cf94958f995ce5fcc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRKPA1800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966d677b8e521f4e81da668647a61f10a44eaf06b41beda7ace99e45da2b7fc1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BRKPA1800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaef22aba83603d87c025a7c27b78c9cd6e06ffc69122f2befe873a9b020274. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRPGD9800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366df2c7fd9523151984bcda726b797cac04cca976819c3d45db34d574632adf. 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/BRPGD9800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b314eeaa78957364064fd1a168cfb5db03c3d4f8a86d0e942ef0b7fee15f0c5. 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/BRPGD9800233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4847c517fb03da68414ab8ebdbb7427ab6d226a2cd95d7df1261667aa2083a. 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/BRPGD9800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d430b818e1f5ec384040431fec496a2e8a5fcb83e196f22e70ab177a6f7de. 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/BRPGD9800238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d6746b87c658e134c03c25fcd2745e1fa7fe636b638c3e6829c7f90714b88a. 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/BRUM70500469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f5d40c07d498baa898df29dcb1d34e610437249bed3d078c40163fb84afdd. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRPGD9800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fd796be025022826728411e066f2516459a4f3e842d0fb2046524e0d3e9e81. 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/BRPGD9800236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52741eac21a31dd68d093a3ce27163340b3fca217d7087a5401c848b6b76d2b5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRPGD9800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe835710b9d8197b0f473410eef2a08ac594fee6d91c2f09636475722353a8c37. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/BRPGD9800230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e32618f45abd2b73c2ceab98a2e2463d621d2c9b9b3d6214010443eaa38b85. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRPGD9800239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6ac22dc1a4ceb5f6e0752a80456801ea8a70839785d6928ba07b3c821dd4de. 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/BR03D2200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054267d4300c80292eec60ef270998f00ec879f5cdc173aa2423a1d18a9d424. 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/BR03D2200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57b0a9aca2cf47b4cc9b5199894f899332fc874ec128ee760d752154bc02da0. 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/QZNJY2027927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653683ceae00a56ac19142b372b89eb17bfbe74586e4dc22d9a41c03c17993db. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJY2027928.