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 0xe01cf0d2aeb3383629acc1cde14c9303c4d31d603bffa3422937860a3ea6fb3c. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adc85f36-9f4f-400c-9338-8878dda1eb88.json and https://artists.proofprofile.net/proofs/artist/adc85f36-9f4f-400c-9338-8878dda1eb88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Barefoot Contessa (Original Soundtrack) [1954]
Birdman of Alcatraz (Original Soundtrack) [1962]
Blood on the Sun (Original Soundtrack) [1945]
Room at the Top (Original Soundtrack) [1959]
Gun Duel in Durango (Original Soundtrack) [1957]
By Love Possessed (Original Soundtrack) [1961]
Champion (Original Motion Picture Soundtrack)
Judgment at Nuremberg (Original Motion Picture Soundtrack)
The Mummy (Original Motion Picture Soundtrack)
Legend of the Lost (Original Motion Picture Soundtrack)
Men in War (Original Motion Picture Soundtrack)
Around the World in Eighty Days (Original Motion Picture Soundtrack)
Drango (Original Motion Picture Soundtrack)
D.O.A. (Original Motion Picture Soundtrack)
The Monster that Challenged the World (Original Motion Picture Soundtrack)
The Barefoot Contessa (La Contessa Scalza) [Original Motion Picture Soundtrack]
The Barefoot Contessa (Original Motion Picture Soundtrack) [La Contessa Scalza]
The Misfits (Original Motion Picture Soundtrack)
The Children's Hour (Original Motion Picture Soundtrack)
Around the World in Eighty Days (Music from the Soundtrack of the Movie)
Tunes of Glory (Original Soundtrack) [1960]
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 0xa3df12cc5c1f6f61e527ceddb732730e8516e07e5ab9c02e7ddd1396c4458121. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMDA71316459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e2e8ef68e5e0c17a883466400569dee973c32c0067a97b90e3c20de12bb81. 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/QMFMF1303134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb47ee058287b971a82d70804e4a2c569a88f828218e0c361e824b21dced4b82. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMFMF1303130.
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 0x2b2674fde5fbc1455801adfe5833d9fb398ed54e554adb429626621dc7ac952f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMFMF1303132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f2b664bddc83b2e4ca76e4c3cef4716410e11918cc78feb1cba836d731808. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMFMF1303133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc331cd2122edb4338240ad0083098f1c056d910eb4942cc9217a4d23a1d0225a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMFMF1303135.