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 0x329bd1966708aa3082e9a8d9e1b080567cab060b7b2078df04fb93c4f70dac4d. 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/2ce8b29e-3aa5-4087-a529-42cbda79fb00.json and https://artists.proofprofile.net/proofs/artist/2ce8b29e-3aa5-4087-a529-42cbda79fb00.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 0x04be65f442219380875b1448685977336e117c41796d6f6dfb168d5426b6dcf6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1482842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d427ee70ff33c54d280cbae0109e1bcc83052021c5fd29ce6e76234411bad. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1482844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa7ef108fcd97e747b0cf0692ea76f26fd27cc9d3c247022030711a5e92b683. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH1487333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293f25e57c264c0ed9ecb47362c59e6b206691d0f574b6032cc9779e59f360d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH1487335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5b6276f1bc045730a1df8fa139e00d65adb4e63a7cb3db0d65d54c1394730d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USCGH1487338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a926ec45202eeecb902857057ad04fe07b7642832e011b23362103e772a94b9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USCGH1487339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e19435c456ff9757055c4a283423dc9320b55df5613fd3b802af235f5998f6b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1487340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a292dbd26bf5526babdbce2249712db63b22131f352db62d9f436b8fdd184d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USCGH1487341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86630a385451ab61ca22cd8357504f2d5a1c3c761c59881a689f2f45e64230e4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/MXF711100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515fb73fd3a4a74657c97a0df122bce207ceb1c9c0e1ff983cc7c13e62b9f33. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXF711100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81594e498fc3fca3596e0c1aae313ca3f3e925b346fc537b77aa84387e5b50ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MXF711100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf74885c115ad7ddceeceab14bebdd3bbad9061f9a37a24ac288ca92be02a6f. 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/MX3451700122.
Live Acústico Guadalajara 2021 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1620c5ac1a8fb611f5c6ae187f2e87aa7068b49f17b323965bcff5d4e2c2b75. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USMH92314203.
El Pacto del Padre (BSO Dark Tales from Mexico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06294389fb0a1a60b95ad4233fc7c344f5be741ce0889fb2fcc9e7b16a68c619. 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/QZX6V2301170.