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 0xfd424a7da0394e932977ec9dfe0067d03f9bb30076fe703aa955a150e4997d6f. 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/085e897b-d332-4225-9375-1845157779ab.json and https://artists.proofprofile.net/proofs/artist/085e897b-d332-4225-9375-1845157779ab.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 0x345e1a0942061ff83cfe4fd228893466c1b06688d0fac6c126399ee63507b831. 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/FRIDO2314566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12fcdea8d26905040dd3749c5742a35f775d582963a00cee1fa4bf411c7405a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12345687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd4e7a8f701d017df84f404cd5a97649a3c3799898efb54f7afbc3412e08b21. 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/FR9W12006024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12fcdea8d26905040dd3749c5742a35f775d582963a00cee1fa4bf411c7405a. 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/FR9W12345687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cfa37c7bccd23a2cb1c8f8010fd0c9a571d6a388b68f06b3a26604cc750e8. 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/FR9W12215767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a02406167267eb285a950d30c6bb0d81af66d896850a4b1a602132f9abc5a2. 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/FR9W12229255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bad677f2c20b6179bb48b0e84d62a26a60242e06274ea94ab421f628e35a60. 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/FR9W12229260.
RÉUNION (feat. Alpha Wann, Infinit' & K.S.A)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6cc7abcd2cc0ec39889c2d973cf675b90192a4c32caee43be5e4f112ac5ea7. 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/FR9W12113328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322637f9578826a22256506ccaeabac1ae90e0ccd5655faf015235bc0db024f. 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/CH6542437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca092a4c2e4c80d0c9e96cd687c9f73e9635367715182eb3d4ab217aaa5cb6. 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/FR9KZ2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428522173e376ee975a396438fb18b7ed2547fd85d2ecd5844bc1ef952fadaab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR96X1864140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b632c74e3c0074aae360af2eb856a7218052cdda50d6a7277e67d13235e90. 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/FR9W12032668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc9ad1522a87f73fda38062ada952f1b5aa0a42b9297ab1e7237765692ca3a8. 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/FR9W12504949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d48ec4d7baba03d335cb744f93512d4aaed890da248c6b4fe139c8b65f3ce. 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/FR9W12504950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207229138810bf83664c0be4615f7eee99f0d0b23810bc83c0446413510376db. 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/FR9W12502734.