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 0x9e0293642ca661ea947db7e5d618dbcbe1f41cf6ba4d54788374eb4a0468c124. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e0132b8-bb37-47f8-a73f-65e6f0e86b2f.json and https://artists.proofprofile.net/proofs/artist/9e0132b8-bb37-47f8-a73f-65e6f0e86b2f.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 0xa81e5f1a6ae955d0a6e40c8627cbd37b1f7460ad62746d931bef5b01991a8ef3. 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/FISRK2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a3d4202ad943f3190084b1fc601e83d90117b24093e2542cd5011bd3b9f69. 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/FISRK2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fadc2b17c134ade194a390885ccaefc211762b391ab94d4880bb6d7d7282fc. 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/FISRK2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c997a5b9bb9601f22067533297a51971fa064e90c8323131682c086b3ac5776. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0fee8b21372e6700b32159cd8fa75c5e2384d5868ec9f25e18aff25c99d31. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4b5811ef525287d8f0be728cadae96e25691e9c68996e4bef7b1debd59382. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151a1a361715580b95aef9447eb3e552b6e407c09bccd4ac62a89ace55f0adca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd15319cdcb902fc35f7883ac39339fca972ec53f88329dae9172b8e2598578. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5eef17a5aca0d0a1c5750b20863b2e1c8bff61e873eb456636362fff16d7b6. 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/FISRK2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233cceb84cff8ee1f61066f91de820b9f7d1fe4dae38595df7c3c81eda181ae7. 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/FISRK2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2ba517e87b22aaf261050c7f41b2fbc3de1192984ea7d7721a7c23477e488f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77cf1f0ebf4d28727ee726592f673e90165dc8413a118a906cae89d326f92c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2400070.
6 kappaletta, Op. 13: Nro. 3, Katson virran kalvohon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629686b6fa4cd6c8361ef7d0a50532ca847226aac61f7fade8113cc671c9c83. 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/FISRK2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35d3e575b5e8046a090e2ca6c3d2d29c5ce3987d11ba6823b448270370fa721. 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/FISRK2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e590080d5229b289c37d1f732d4f799b84c0fa8c277ebc2626e5dcee9e65cdf. 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/FISRK2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e40065113d9f4b21f1b75519e34391c22b903157d644c31b244188b5b7b588. 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/FISRK2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20cea87fd24821e6851e8c62da7903b3cbbc4972b4a6201a35ac78b5b982d57. 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/FISRK2400075.
Tunturilauluja, Op. 52: Nro. 3, Laululle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5614f399cbe6dde835ab84ebcadd02f805617244bfcd477d5b130dc1d7c84. 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/FISRK2400076.
6 helppoa kappaletta, Op. 121: Nro. 3, Kehtolaulu (Berceuse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6effaac2e0d435c0b8a9bea141d2bf6e4f99813d33c09fcde514e1274ec53. 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/FISRK2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b6f6b3dc1cda953aed28c37214cef6326f0104849efed2abc9a3183a3fbe6. 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/FISRK2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b81ffe8bd681440eac22315747c9f7eedb917f7e4914d184e6e76b9479b970e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:05:33Z), 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/FISRK2400077.
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