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 0xcaf136f965007f28ca144d38ebf3f83472ff49bd8e9856d7ff300b2224b1725e. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6a378f3-7685-48be-bd96-f2d660ae188b.json and https://artists.proofprofile.net/proofs/artist/f6a378f3-7685-48be-bd96-f2d660ae188b.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 0x426b3a00134b8c1d1d14af82bb5ca5a6c6608b7f43cc4af12a6443d1cce48b06. 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/ES6062408601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11729bb3e05ac322b8feb3b87973cd12ae5766ffad9ff8aebee62fd6ff7c72f6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/ES6062414001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1358dfb26788cb2d264f219f4860df670d447c69551ce6f2d0cccab32853df. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/ES6062416201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3977bcb23e4b92561ce5fcd8ddab3bc7c9d2ded86bb3c5b6b6899249c3612f2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBMJG2209631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461fa8b1e1b8f670ac47bdc6c82249a237e8ddc33e2c1f258658cb75deaa7f6b. 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/GBMJG2325923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94540a19960e11515c47215d7cc0941ca765fbd5127184eea90308042b54bc17. 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/GBMJG2216539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df3d399d4418b5bb8ef81363656d5363228ae360f5295892aae0cd415cdc92. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/ES6062418205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4814cfd7b3e901f7326bc53349cc56b58d135b70510bd314e28f8f709a46d315. 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/ES6062418206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed25bd2a1fc8e6b34097e5a23477c4a36ef659adf774d1b8e88182f2094cfa61. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES6062418207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426b3a00134b8c1d1d14af82bb5ca5a6c6608b7f43cc4af12a6443d1cce48b06. 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/ES6062408601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9777efaf867ec218c648d4c9b3c06a5667d6fb43f71f9ed9159cb64969f3da. 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/GBMJG2303145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59219612f35ef0ead2736542d9aba219acb25444b1587e199bc5a74dd2d0b162. 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/GBMJG2221186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8d892f101bed76ee17c98cc7d19fb88b3ed9221d3dfbfa720afbe0e6870a26. 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/GBMJG2315280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6cf121a55f6ae181906b7987bbbb617f5239e5590b927351d8c275ae040c0f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES6062418212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11729bb3e05ac322b8feb3b87973cd12ae5766ffad9ff8aebee62fd6ff7c72f6. 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/ES6062414001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df4d5f302b794f2e307cce9de8f13ae8db9ffb2ec1b76b025468ad4b2e276cb. 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/ES6062418214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94217dea97e6651cbbb6f6bf15fa4d173bc665a6265077aa7bcf6b10ee2391. 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/ES6062411701.
Tinder (Vernos Otra Vez) [Buenatarde Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94841f3066068422a3e17f61eb1d48616ca99cbda1c6edb2fe6901a6cac81333. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES6062534016.