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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2446c2cab6facc3b4d6e742331b9f048e85c5c30372d7bd156dd96005f693d32. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4de054ad-0234-4535-81a3-73ffe7965ddc.json and https://artists.proofprofile.net/proofs/artist/4de054ad-0234-4535-81a3-73ffe7965ddc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ab06c3f7c70477e066d698c4291ad4cbcc7db1a28c053600569c04bbc31d9d. 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/FRZ048400508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc7bbb0115e67162a90f4723a5b3588e17625dbc1f1872413a3166b85cd874f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRZ048400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05b6aec80c987c97588efed3a651783d13f305b60d819aac5c9f03ff2602e45. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:13Z), 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/FRZ048400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb66b77b78479abcd4e4bc356f6bf41b4988f28c548d4e58c93bb07e12736b2c. 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/FRZ048500523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eba90ffea08257ba24dd966c41ba6acca345abc0f3daac1e9263e946c681bd. 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/FR6V80942664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33fa06802883ace83bcd75bc732cc7d841c1f24dec454e2ee8f80827fecff0e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRZ048600612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2fbb0a48bda56b8da285d2c7c566961b261d4b5201a43ad482bce464dbb567. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRZ048600613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df22a5e67e3e3f49e692023b95d4170de96f06f6263c1f5de4835e09b05396f. 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/FRXZI2000530.
La maison monde (with Jocelyne Béroard, Jacob Desvarieux, Les Yeux Noirs & Zola Tempo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd966e044394f2fccc8ba2375ecab376f2eb714c99750d2d612efd2a545c661. 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/FRZ081300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ddeacd0c4cef792f56fbe6a55b2d1cd4e98dd726044d93166927e4a44061b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR6V82707676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1576c596bae5ac43f9b85918f014d395d10f2a868e61447f40ed3e43023dfb15. 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/FR12Q0400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a0fae75c036c2c1f448bce2370c569dd940a0b224d869b3b6e4f7d934d9d5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRYAS0158940.
Essential Lounge Music by Carlos Campos & Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7209e2e26aa98b752894c45242dbca592200c57f27f85d0facc84603a43812d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRY401400053.
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