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 0x4af79fe90f9c6c49230b2d61ff38babdbd25a44a91b012fc3370724122e0fda1. 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/4a634548-a477-46cd-aa13-6b3f8a65ac72.json and https://artists.proofprofile.net/proofs/artist/4a634548-a477-46cd-aa13-6b3f8a65ac72.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 0x20c022a13ed9cda70e615f15e01aa9f6958b3950847f0cd5ca6d9fe66c5fc7bd. 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/FRZ028700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45619a4d09f19c4df0ed782593ad883142a334f8f9a3a9d54e9ec94143a6476. 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/FRZ038702770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3da19c2daccff78046b05111d3a8aa331eb6c3f6c20e38e89ba047c69a25da6. 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/FRZ038202330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960c91cd019cf45f1598da003febd4f78a735306f4c11e43c53ddabb3d009723. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR25F8600970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dc3297d3114570fddfd388bb75e5a3756f39bfb973cf1ff3cdc270fe5cfd6c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRZ808680030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75aa2aadbcc8e86481ac83b24269f8369de689f467a7a0278733173ad836199. 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/FRZ028800580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f5799ece478ae7a4f3f73b85c3cf9cc57abffb410a514d0b50f08801368b4c. 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/FRZ018801160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5f7b0930751d3d06f98422929ab9ba2529b86c62fe24e68c1e9228281422bd. 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/FR25F8300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91671fd7902518c65d7ab7a73f1b44af459c6c4c2960987770b9a85ea9fb2c0. 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/FRF968900120.
Tu veux ou tu veux pas - Nem Vem Que Nas Tem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05cae923358b6b2903cf98b83c30d751708554aa021457a7de6182cd2b3bfb2. 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/FRZ016902330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dc032c8f10185bd37de037f01d190160afc18614d38b8ed9a1e9a68f075fd1. 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/FRZ076403126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281954e1c3017fac3a7d2a3535f71361cb1ad675570a6c67443e6a93d2faaba7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:15:06Z), 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/FRZ017100940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853c269a461ec17ff1c21b7d6e7f0be632e4d55668f2d1cf5c09aa720dee2d92. 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/FRZ017400780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644369246cc30df22b1b5451cdb2e2a4d90a463763a96c0fa0cb200f52c43481. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1257480010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac98099979bb0f1c41ac2c2b9c7b98bb7a9d28416edb887aef8e5758cc1ee5f. 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/FRZ027200170.
Le banquet de cristal (Celtic Rock from Brittany - Keltia musique Bretagne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b231543170f05d184303f1018d47acb072dfaa5741d822fc6071a61dd14f02. 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/FRY470819501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf565bcaf6f253ea52f71872981cfe800c65c935f9080ba63b396f7c47742f651. 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/FRY470819502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d34f14dddba994cb8750baf587c489f384f426963c877cc241dbb5b93fe218. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRY470819503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab5c2324e10c657743fa315bcd2a9475c4bf33892547d80db4dc69983ff3f1f. 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/FRY470819504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7a8925d7f4364819e0f6153ea3c9b96c7b1ce8d1fc9969a2134c9ff0ee93a4. 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/FRY470819506.
Tous ces mots terribles (Hommage à François Béranger)
La fête au village (Celtic Rock from Brittany - Keltia Musique Bretagne)