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 0x8d0925340da10ac3e690e80847b1916b3f32f61d049525f4fdd9866fa94f0698. 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/3dfd210a-011d-4620-8001-2255ba097488.json and https://artists.proofprofile.net/proofs/artist/3dfd210a-011d-4620-8001-2255ba097488.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Prima Volta (First Time Ever I Saw Your Face)
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 0xa7b6761a6832c984b0ff75654da257b91f347cb88ec4420ce86886398f1dc750. 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/GBHMU0900017.
Sei Con Me (There for Me) (feat. Hayley Westenra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b0fd84a2087d7789e3ffdabf1fe498cfe158f4d0caaa74076f394689a21f0d. 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/GBHMU0900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96c145c57f23ced7fcfb8c4176db5fc84a235e1ef10811d345bac8f5087daa8. 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/GBHMU0900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b199a0f7055e14167b1713ce84d320137da9a7ccce1b488d3805059699a7fd. 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/GBHMU0900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3e60881e35bdd8a5d5aa8a691a649cb94b20e38429cb2e15c1e23b3703d68. 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/GBHMU0700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96c145c57f23ced7fcfb8c4176db5fc84a235e1ef10811d345bac8f5087daa8. 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/GBHMU0900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3e60881e35bdd8a5d5aa8a691a649cb94b20e38429cb2e15c1e23b3703d68. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GBHMU0700078.
Tři oříšky pro Popelku - Motiv I. - Úvod
Tři oříšky pro Popelku - Filmová hudba - Komplet - Karel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38978c5d9dc0218c0491e2bec17826243513955cb6eb268aa03d018c58053c96. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZA161801222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09659dbb31a50b311c4477c2ccd5bcc3fde03e21eb0774d98874d2f3f0e3e2d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZA161801224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af1af54058e606ae390f373bbfdd65091fb9f5e4b3cee942dfd3069a9c2d4cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA161801225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68767ef91a92d9572925c1f3b3917ca824fbe3c7cc3311eb69cd5f1908710264. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CZA161801227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a880391f4703596f5af377c2ca7d465340aa39c39fe71d5cd3d03545ba496d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZA161801228.