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 0xc7392880f89481a717f8e8d70c978bd2a06543ff8f25a336182356a1c505d1d0. 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/a682540e-6ebb-437b-b7b5-6b4ada7bf422.json and https://artists.proofprofile.net/proofs/artist/a682540e-6ebb-437b-b7b5-6b4ada7bf422.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 0xc696f9a407b8e8bc0c2deeeb7af1c538b244485e9d16c5494144a5767ce25abc. 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/QZK6P2071240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d71c03f49e9ec391a8935cbf6990a8cde11db0cffb8d1015d1c3b5090bf9557. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFYX2297284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b04b88f6a9ab2bb54bcca5697f5a0adcc669bb4d6ce1180b3c1e78aea02e05. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN72272827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2aed0254705333d923f7e4a5cca1c84b70762068107082289038bf405fe06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP42374545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf1995617fbc6eadc3319fb45aef53f0873ab7213227a659ea86502171e2aa. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZTBD2378590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d2a3c7d282a1be5835040a7d164445844dc6a1e27b8d00ecfadd30eb8b791. 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/QZHN32478096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d2ae254042315f9ac83788c61276e099de5800a7d47be3d1589d4fd6e13c5d. 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/QZNJY2453105.
Valles T vs. Bnet: 3er y 4to Puesto - Live
Final Internacional Argentina 2018 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde84684a704f4e5bf234f9b2a272395d63e7232895ab9db280c7780b779367c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATRG71801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d60202f83175fc6b9ce6f71f58be2dbf3364b30bcc6e91e98fcfb0ccc8b9984. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATRG71801203.
Pepegrillo vs Valles T - Cuartos de Final - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfa8ebd693c3748e0a29ace0148499178518be87b13f225eab03ab39d1a9bf7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATRG71801199.
Valles T vs. Kdt - Octavos de Final - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3884189d5ce4992a4a6e1b34128704c370fce4c0c14e5db8d377b6c79f85531e. 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/ATRG71801191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95680812e1daf62d8494ef9cb186a0ae1db2ce33a28e72decb04c25e0e5b07ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATRG71902801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7044f6ff71a1cde3afcb4275082057ea3df55f746473d5f827c7a26c051ac9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USP6L2403035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81468277215de75f07f5e57d9f7c3f0b8c57b0f63871fb23bb86a984a7488aaf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USP6L2403040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e69533faa2d06682a34b1b999d52da797c0cae98260c903906ac2e6c066c9c. 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/USP6L2301799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b15b47fb678ae009e7dbbb7d91c1b706ad8711cde0e36e278d27c31049f8fcd. 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/USP6L2301801.
Valles-T vs. Marithea - 3er lugar - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8ab23c40be5a389ed79ea04c75b137229c15ca63a284425aa1d59e848e1179. 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/USP6L2301802.