Leo Sidran is an American Latin Grammy-winning musician, composer, performer, and producer whose credits include co-producing the Oscar-winning song "Al Otro Lado Del Rio" for the soundtrack to the mo
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 0xabd11f3f35174c6e5ba8689590a39fe7b1407d92b1002af40351e82e095c68fc. 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/20ca414c-4ba6-4a59-8c0e-3ace808f793e.json and https://artists.proofprofile.net/proofs/artist/20ca414c-4ba6-4a59-8c0e-3ace808f793e.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 0xdd0495d4d41f83c496fe8f95281bc15e4981c8b211b64d5b5ca6ee64f3564161. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US3C41400001.
Cool School: The Music of Michael Franks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402c4ef799b6945b3d93fe3a2fdf0dc6e21904fcf4750a484ef1b4e01fd5f4c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR12Q1700900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772a6f22563595659d0ad3f8b59f31183175d9fd1d5ac2d3b5fea3e5c85c248. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR12Q1700904.
Cool School (The Music of Michael Franks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378a5c33cc26b778ee39e9a11c8c91305c6dc69ecfdb12ff7464372fe6ee960c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR12Q1700898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c95250b2bd8459f191706dcf37a273766d9bfcbd83c799cd082b0b8b77a65. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR12Q1700899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e33fbbf3897fc40aae60e9e9cecde304546ef00160056b4c2cb08da41b8a4e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR12Q1700901.
Cool School [The Music of Michael Franks]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f024eb46594d2559cb2b8528553b86ce5c7dcbd6f258e34f37560e7ebba95a4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FR12Q2001113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb325fec1900a72532b134d9637a91c0b150b56951f787a1ecf2eeb43d4fa6b7. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US3C42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023d252422ba5cf432aa23f73d801a90285f175c093e643d61e943ee22767cb. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/FR12Q2001116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d04706a2401f1e01e4f2742bb66f9ecc43a68bdb10b2e4aa086d4f6a754d3e5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/FR12Q2301170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f15cb9703a80b8434e8ab91e20f7867252c4d3855c198382fd942a0ebbe0a5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR12Q2301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b4b3ed5e02d91a7730f5d66688e023eb35faee641382af214c44de1aaa7257. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR12Q2301173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39edf822d5cebe3f082ec1cc7dc0d4f00eec4e642dc1b447ae42631de61e812. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR12Q2301178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f28daaef67d783277c16a69863c468989ccf6a1ba85103469c4e336776c4c. 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/FR12Q1500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9d315c0e5238a3eeb9be466c373c0a766c3c9b5051b0294271e7bd91a0ce07. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA370673439.
Motorcycle Diaries with additional Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87ddad554912085e201742601c07fe2a3ba68fb3814911aebd70f09cbcb487c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960430319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87ddad554912085e201742601c07fe2a3ba68fb3814911aebd70f09cbcb487c. 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/DEN960430319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f28daaef67d783277c16a69863c468989ccf6a1ba85103469c4e336776c4c. 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/FR12Q1500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf7cf6519d843765340c6f59e01b6e1ba6a036bdcc006a15e30aa8f349d4956. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR12Q1500842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d35f102135eed102e9ea294a64a6fe38223b89cbe958349750f097ef861904. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR12Q1500843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dad03c0bf7d390f8ee2f2bd43a13178cf6ae925ffd3a3359188f3c9c2a88b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR12Q1500845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aeed4d5115c7acd2f2a5374aebb745729146fcb6077c60a3d27e0cef179bf5. 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/FR12Q2401197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87ddad554912085e201742601c07fe2a3ba68fb3814911aebd70f09cbcb487c. 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/DEN960430319.