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 0x9d4d18d6d87c43f883c1b735d469e1a0d017d5bf2ca3fb79f9d7962fbb73f849. 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/06bdff7a-98f7-4472-a129-52617077a60f.json and https://artists.proofprofile.net/proofs/artist/06bdff7a-98f7-4472-a129-52617077a60f.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 0x2089ff256c518dbf702da5d1becf590320a9fefda6bf76e89f7af5600c0ed4d5. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BROOB2200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2670ddc64cd74312ecb2df8d99a0ef13724b6aa084131062997fd76b08dbbf. 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/BREE20800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce794bceb2f977728e6e8108965bd21053eb9e71833051606abd1916d056db76. 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/BREE20800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4761c0f2f9fa77a6a4d27b15184379f91292ee6c540963caa453eefad4db5927. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BREE20800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fa1fd5b5d31f563be7aea8ca055f02957976f5bdf27f9db942f00b3e0fe0ba. 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/BREE20800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219094f9cf528f747e372f767d7208b94470aa83054f03ad5a4c1443df23efd7. 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/BREE20800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aa693fafd1bc8eba257c33a9976b2c1b8013b56edaeddc098a20d85d45aad8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BREE20800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f3bf19fd5979ead93e4bb135c6f1f723a77821307decf995ed6b3fcaa7afcf. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BREE20800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37498a3fad6b842eb8502660910ed7aa0efe9f985045f43cd7032eba68223d4e. 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/BREE20800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b1567255c9d64626b65a65f83fce2f24fad5fadb0e14e2d8b5c335b552853. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BREE20800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b28d037bd1172c1bbc4835a4363f5a5b37447155b468a1189e13a5db2bcf6f. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/BREE20800117.
Mauricio Tizumba e Sérgio Pererê - ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cdb99884e5f51fe594da65004341ee7eb4d712a4f03740db48e481c4fe04b4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BXM0L1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f1b3979b06517e4a94ef3c3a2e880a05aa1e79c3523cc29fef0ceededd9a2e. 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/BXM0L1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651d0b5c924e33fe4cd5fb194f364972a5854539c2169a259e9261e18ec8cccc. 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/BXM0L1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921b65fff69016a38e920546f4acfdea7f9a6b4f986e80ba6713db9bf54adc7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BXM0L1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cd890fd7b02b2e0f18798c76e4d9fab9797c3b6321f400cc35feacdaf75ef. 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/BXM0L1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda51ac0e296a143da62bfe09d3b7092d947c3bf96e0e5660dae310b1b6e1db. 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/BXM0L1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aecab8a4a58b0e61e1c846c826b32f2f88a77ba22554a5eb2228178e1e945e1. 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/BXM0L1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af00a6859b36bdfe22a2526a3773a7cf11516f5b30c46065c182dd5f6ca6092. 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/BXM0L1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1d5436b2b63333518fe75d44b3bf94facd43c5d3ca3c98048923964d1d23d1. 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/BXLPN2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb67e36468427a01f0b1ada8dfc1afc86534df312549950ba8dd9d813dfb75. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BXLPN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af6e70fe47ddd185d9aee102b061a1f0cc8ea2a60c75e71c975fda0cb3a351c. 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/BXLPN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b9cda67fa18b0970e0e9fd302694d96909513c56ae03a7422353a775a83aba. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BXLPN2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451d90185c5e236e5b14fd19554bf4c2a05eacccde2f775f1f212acb16955657. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BXLPN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a4976220cd93962c4bad89324b7bcb7f3e00c635027e1da7a235434a24e902. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BXLPN2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fecfda757e55617bb8ba2fa743683d275729bb6287696de8949bb1dc07edabd. 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/BC7SJ2100004.