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 0xead0ff7c12b481d104bdad6734b4105b6659294f3807c7ac05ee0e4ee5b218be. 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/016d5585-59be-4b90-bcad-e17048184223.json and https://artists.proofprofile.net/proofs/artist/016d5585-59be-4b90-bcad-e17048184223.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 0x03bcbf40596977e848f7483cdd44edbfa87e22935b6d70395d54931d3d1635c4. 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/TCAFX2146732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581adc8539c2a44c4ce8fcccf222f36e1197911a889d8705aeecf5cda95f4a00. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:55Z), 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/TCAFX2146744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd88fcd466eda006ce7dad0af3fd477572aefb828c6862e738f783c1e64f7a45. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAFX2146751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f7b9fcb5332c204b126cdeecd6ee56e6fc053a233b53312858987670c5f5f0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:13Z), 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/TCAFX2146757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799771ac8bd7a4a2ca131a2c2cab96baa98dc2e3425fe7710df6c1c722e49846. 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/TCAFX2146759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eab56f892e8d3033abde4bf9d5d05cc8b44195e60baf33653c393a6340585c. 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/TCAFX2146760.
Enfantillages Pittoresques - I. Petit Prélude À La Journée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025fd1aeac4dad83ce2bae556226afaa1456b91f55cea01fc4734290c146703. 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/TCAFX2146765.
Enfantillages Pittoresques - II. Berceuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3975f899987f69713f57c44893bf5e176932919363e755f516dcdd2c3fd67f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAFX2146767.
Enfantillages Pittoresques - III. Marche Du Grand Escalier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8f758f729b97b52f353d829519b64db9554c96f1e527fe57b39068ef8515b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAFX2146769.
Peccadilles Importunes - I. Être Jaloux De Son Camarade Qui a Une Grosse Tête
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3360336da81c3c21f5c9667650cb88c90e94a9b362d553938646de90d96b3c3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFX2146771.
Peccadilles Importunes - II. Lui Manger Sa Tartine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6105a4189c43e3b13a8cf3de616caf9cb1dc872f0baf30ded2a196014b061241. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFX2146772.
Peccadilles Importunes - III. Profiter De Ce Qu'il a Des Cors Aux Pieds Pour Lui Prendre Son Cerceau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c29f2380619f61844e610879ffa9af3964b4382bea492cf617eb5c42ebc3c6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFX2146774.
Menus Propos Enfantins - I. Le Chant Guerrier Du Roi Des Haricots
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7eadc99d99c470eb224f0a9a2e81b2973ac7c126ae12627fdcd8e7466b487e. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:27:37Z), 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/TCAFX2146775.
Menus Propos Enfantins - II. Ce Que Dit La Petite Princesse Des Tulipes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c460554558352d4691c2367a422e1fca5d9cf37e67969fd9b19b571b82ccc1. 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/TCAFX2146777.
Menus Propos Enfantins - III. Valse Du Chocolat Aux Amandes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bea41b2f399ca234dce1f4b986b72cacb2d2b3134fff9cb6ec5ba1a6816e7ad. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAFX2146779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72ff0263a5aa49202322254ad238ffc5c0b40a9bc2536cce6991f5ead1587e6. 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/TCAFX2146783.