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 0x5a13eca4945624dad9f86da1d5a08c459828c24404a6712f7c09933da8058be5. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c68259b0-8dc2-4be3-a9c8-35cb0f907e8c.json and https://artists.proofprofile.net/proofs/artist/c68259b0-8dc2-4be3-a9c8-35cb0f907e8c.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 0xb1f68667590e49e7b2744c52d4a3b5ac241e6c28a25116203b28016643318546. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BROCF0500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26e2c28041fb70bc4a1f935be581de4b0d77b84f1dbc263773c2b287e866fd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BROCF0500053.
Oktoberfest (16 Temas para Cantar e Dançar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4b559ee0a0208b6090f6f749e6c2d94046fe4ebacdef03f55ecc35c5cd9484. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QM6N21584223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58d1525fd8ef6b3f82fceb477a6f115d3209ff20dee76f0c2554db1002d84be. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM6N21584233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2185249b27dd615bdd82b34418b8107e40203d2a5107030978dc54b4e22c0f7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRVR11100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e4e5c74be5e57470d1478baf5526329d70840edc958c9f637053c7a4ee624. 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/BRVR11100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee4117281be125af80110afd14cba83ae407448981db0416220d754e68b9001. 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/US7VG1610972.
Inaugurando a Churrasqueira - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bdd13e6a8fb880309b0c9bae2a5c2353e43c5f245e39d2a66214e13ae229ac. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BROCF0200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639db94f19bd5b4de0c5988b2de4ad1e8d77e31a49974edb96c3adad3551eb29. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BROCF0100411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ded8af009d3083c3cc46b867b1eb1a838a08ef8a22f3fc531f9a22063bb653. 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/BROCF0300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82caf9a8f5c543953b7645bb125f2077b8462e589a4c4624922f96e1f4d54d9e. 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/BROCF0300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a01301423553170f21d64e57b16a680763df60bf39cf6da257c9cebddf14c5. 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/BROCF0200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6020cf0500e6e68fe77a63800bd9bdf41cf08b5a0e13cc2f346a363d183f29df. 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/BROCF0300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039dfb150d01273e4f971bd516a6b2b993b435b82b838dbdac341c5ec205197f. 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/BROCF0300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac3af34cf9fe6120798e204a01d9a4309229f94b0569e4bf24fcca7820fac02. 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/US7VG1610974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7befc5b8a4feb221cbb69ecde003ae183dd6fe863280a5d1180a7a749e43fd0e. 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/BROCF0300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19adcfc644cd6c040419b4ff8c09c6181f0ef2202b69f958c2fd7e7ae52f42c. 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/BROCF0200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb570f976b84af7716ed08fc1100a319b3e4d7f068e5c56b5f32dd106b86db1. 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/BRVR10700916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1880e7f4c613bf4501c7c6419a13b57417f5cc971def3bd4a1cb2fcabcdeb7a. 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/BRVR10700918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c7153a04720ec63e110744355be137705eba10b9a4fb118103a6bf829e2c44. 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/BRVR10700920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4097dc4306dfc5a949a2c014eab19e06c405d037045dedccd5ccd08fd7ae5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRVR10700924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782380317613c5dac8022846a6834d89393d6e386cb720cf0881ec1f02f092cc. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BRVR10500654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00eda8ee5fa5a9fca99cbdd48a40915d614f2449c21aa82981be6d79ecb14b2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRVR10500657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278d78aa283259d9d5393d29a7c8d4e4bb2694f28ef48cfc3e988b57b96b07fd. 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/BRVR10500663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc8b36a1d9b3dd71cf0f83dd17c7f756dea428ce0d591075314c4e35ad27c76. 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/BRVR10500666.