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 0x670ffacf0495bbad5c06ef5f608dffe6d2a6d19cbd9fd5d0cbdbbf009fa2eb2f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1620f43-e978-447a-84e9-b558d71a20ef.json and https://artists.proofprofile.net/proofs/artist/e1620f43-e978-447a-84e9-b558d71a20ef.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 0xf3815fad83440e5d4d85dfa2d532a97950208358543b6f69c9dc96533d16158f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITD540700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b74f6f19628b27806e0b81fc60c8b1e3b78ad8d75a817b8bfda460989dea99. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITD540700226.
Brazilian Dinner: A Saturday Night Party In Brazil (Jantar Brasileiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbbbee056daa1c89706095fa44393ab017985af8921bc5c817eed2cdfbc012c. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ITD540700220.
Samba de 1 Nota So - Brazil Dinner Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979b45e821a7164eb95fe80f501b823b08ae5ee149872dcd676ba2d693bcd5ef. 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/ITD540700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a36fe6a4beef7f72087f3f372fe936970262186011bd1e549ea37e189bf3168. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITD541000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7907c74a60dad789f0ef2c30ff87daa95c96b013c32c2c4b4fc4758cac4fd. 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/ITD540700219.
Coco do Zé Mineiro - Brazil Dinner Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2c075901d870682b448651a01bdc7a61c879f6db7768fef0a2a69ef449d0b3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ITD540700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7fe5b52318e85a1da288d3798f02ee94e6efbb7dc9d7bceafefa7bf7cb6ece. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITD540700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a36fe6a4beef7f72087f3f372fe936970262186011bd1e549ea37e189bf3168. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ITD541000800.
100 Hits Latin: La Mejor Musica Latina (Salsa, Rhumba, Bachata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2c075901d870682b448651a01bdc7a61c879f6db7768fef0a2a69ef449d0b3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITD540700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3815fad83440e5d4d85dfa2d532a97950208358543b6f69c9dc96533d16158f. 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/ITD540700217.