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 0x620d664a1fc4da5a2956d052980a7e9d291c70c253235bec33a21d7c7152f3d8. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13d92360-bba5-4326-aa72-8c0e70876582.json and https://artists.proofprofile.net/proofs/artist/13d92360-bba5-4326-aa72-8c0e70876582.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 0xf2114378b45b4d930c70a09a1d9a7deeb20aab7792549407ed312e1cc82ab95a. 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/FR59R2015881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d5d50177b56e8a7eedd0a6735cc90398176f06f9bb163ab44dc1731a788da6. 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/FR59R2015882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f33782701b6e3a01d457d8fb0583e964d58bd715e7e9315fdbb006adbf824d2. 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/FR59R2015883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07ba60bf7c2c704b31d2ca4617705a911c193f6adfbc0d797d6ef1bee2de8d1. 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/FR59R2015887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1912115f182c5f5e6181297455f2b29ca90df92d1484d0d05674e5c0c1008394. 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/FR59R2015893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be38ab8e1bcdbb4cda10a8d2327c49084d12cfbca159692ad9669097decd9d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR59R2015885.
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 0xf5b6d7a3f194628101f0b588798691a00a6aa920f5eb61e6febf5f4549aa06aa. 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/FR59R2015894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa189be6014592c5fce44a5945db6e3643269116bc77de31f6ecc43897b9ed135. 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/FR59R2015897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd696dfacac19f69fb77836a3eb66125f54ea980ac967008a4cc8549467187a8b. 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/FR59R2015916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bf5a73232b2ea47b4a9890d85725d57f4e08811df8f00a379e0b8c37c77c46. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR59R2015886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7386d626c749e9d9f87a90bbb94e48b302131710789888accf04251f7f944cde. 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/FR59R2015899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee175bbf777faa250098fe511194fad8ce18e9273d59eaaaeff6759718eadeb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR59R2015903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72830fbcc11194f7c40917ff492e208d535bb232fd2da135028f92e8c05b5168. 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/FR59R2015839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fda01aa246ffcd72085f009f48c4a2b88c5fe887b5d59b792ebf6aca4568ea. 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/FR59R2015842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e717267391b05b6d546bb26db31a157257006235a4a9a2b7c780cd8b19250c. 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/FR59R2015843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b587666f0f5b0fd72a1af0dbc79162da7243b9470afb404c515da94e05d74f. 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/FR59R2015846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354094945366819d978ca1ff9b6da32bc185525231a5670c03a874d537dd6818. 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/FR59R2015844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90874a45cdd236fd25e8b562b2e7f868c71d7fb11ebc2f2cecb8cc5082248a83. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR59R2015845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96535c91524dbbf7c3e36081e07cec6d874c4583998e7a877244731b1cccba6. 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/FR59R2015822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7577e6410265e8f124620e8750433919bf960ea6947c5d21cfb98b9ba77ee6. 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/FR59R2015830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150917349a0a0582673647f0effa81349a6cf1054e59523da9188af46b428a5a. 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/FR59R2015836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bf7ca20be7cc809eeb066de63f7134ce99700ac3590809fb35c2c1fba2c2df. 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/FR59R2015824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944e495b5b170f1cd27f9e910bb96a65823fe031e7f69da229668e1d02996ab. 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/FR59R2015823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df6048ef376f47b2f952cbeb0bfc9830088b5feb6b75c08eef5e64b55d9725. 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/FR59R2015827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668bfa9230861f46c05a01c46aac723cbd12b0bea9fab169aaad20bea339bbd0. 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/AUBEC2157665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb1b530c906a45ea107d542417416afd4563e9f41f4051859465a35e7d8a75a. 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/FR59R2015817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc69a8b523267856227bd00afe14763b8addbcc549ce0e2255c3f9104ad6a67. 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/FR59R2015818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83a503544a7d2993486825d63fffebe8bb6b35676b7246e6c80be6fc983ea3. 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/FR59R2015819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdb9e855c0a429e67a488ca27864d53e8ba9f21f9b1ed4f74e3d9f43a37e2de. 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/FR59R2015820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3544da8c651e2e14bbe473dde62dfe21cdc012f062691360f9977d41a48034. 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/FR59R2015821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1402e1e4a595a13fc96888685dcb725d3d1ccb28fc0c73ffd8cd994cf99e19a. 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/ZA56E2201362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80e765fbc4cfd168295e96c557a930a2c35b76fc68621f482c8b588f1cc7d10. 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/ZA56E2201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75619c9f9998ef0cca4ee6da7b614028e2706773195cf48130bc60453938ef59. 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/ZA56E2201366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b9c0769bf553cc9bad4a18f74c8982eb91f79066be50e9b0988b10cf1e7a8. 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/ZA56E2201368.