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 0xd164de741c2a2a7e5acfb5e8f29fc56700f215a39a1181e911bfa7f079bbb5aa. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b1c3629-bb37-43c7-adf8-e8809a187318.json and https://artists.proofprofile.net/proofs/artist/7b1c3629-bb37-43c7-adf8-e8809a187318.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 0x2fa98c7a7b7a6c5ef51b42a37a2e1a384e03af2607733c8997711edf3dff232f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BCTI82200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef479dc62a36c4aeeb5754c7c3f5adaf28b80bbb5e99af852de60c4aa16cca. 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/BCTI82200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8168c8976243c4d29d7adc776c778bcee5b95ceb310378ebc2bc4d257249ee5b. 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/BCTI82200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa98c7a7b7a6c5ef51b42a37a2e1a384e03af2607733c8997711edf3dff232f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCTI82200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec6ca6be39020f1a2376ccf8fea4dd075e9049bce718e0265bb2c2324f1dad. 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/BCTI82200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f906b2a56d42673a822e0ccd4c5d6b04fcf8eaa51edd0f4cfc48c3b15b3181. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCTI82200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ae590af80b0a518e2099bcae3415512f6af80dbb4e5d352c6dbc6c52e8c524. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/BCTI82200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a2483e94197dabf6e6d186976a058d4129e12e833fd3c9ce629c12216e40dc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BCTI82200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93de6833c5da3fca067b710f0bbd6a8e5c8f5f8a85f1efce550b5665ddc3dda9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BCTI82200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef39be3fb895e3262c8ecc1db5b8aad36339c0b5dc3a9aeed15848dea3416bb9. 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/BCTI82200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc3e747f2ca1293242a529b5e54c0c1881006b2eac37be21e7248c3e7409e8a. 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/BCTI82200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62732bcd31fc36f9287b9acf0a805b6540d34d993b27584c9e5c98b4bfc071de. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BCTI82200031.
Naked (Ennzo Dias & Maycon Reis Remix Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9ac00e757ffc7c66944fe648fbe75ba3fcf0afce794ef608f7125cb0c5bd1e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BCTI82200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6e9b042d779b3ca8c71c0c79bbe19a1460311f1a2ac1ab5743a00c6fb5ba52. 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/BCTI82200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec6ca6be39020f1a2376ccf8fea4dd075e9049bce718e0265bb2c2324f1dad. 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/BCTI82200034.