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 0xc15c2b81c825b6828b65d84674a4b97c13fb894b0905bd67b604aefae1648c89. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faf4714b-4d39-490b-90e7-2f11eb6f62a0.json and https://artists.proofprofile.net/proofs/artist/faf4714b-4d39-490b-90e7-2f11eb6f62a0.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 0xf68bb12408c47e38dbcfffb3120fb3b2343b7b6bf07538d077a5b01d61f95e95. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMYHE2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d217d9d029f82b260f53c8ed91940a0090f5896500087521cf8746e7cb735ec. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMYHE2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e34052eb5e62aca32fa5f077bcad1b3accbaa5931c320fa015e20590d2874e9. 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/QMYHE2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039bc4db62d6fb185a2be6d33ba197604caca6c787a3c69f3c4b979c9829d2b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QMYHE1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab4d1acdf5ab4e2b3bd575d8519dad6257d75d47b3b0fd1c0cc953ad705522. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMYHE1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ac109b272e59cc3f20bfa18d30c507271a0bddca39ba19394dbe15c89b1b08. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMYHE1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec21d03cb15feb9094f878b681429e38e3ef2b2233e7f9ab8e955037dc2fd48. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMYHE1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372fbd762cefc3f76224452e16930ca9809b002548e58bfd89133b989981cc8a. 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/QMYHE1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c28b4b2a17205c1ec34cf0936f54b8197a3cb68e6ea477322de0b75cdc53f9. 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/QMYHE1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a870e31e36c58c9475dbca9b47cf1c28377a90549336162dd92039c82dfc43. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMYHE1300010.
Justo Almario, Danilo Lozano, Oscar Hernandez, Ramon Banda, Rene Camacho, Joey De Leon, Dayren SantamariaAlfredo Ortiz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492871435a3c485c408c45dc4654fa8423a406b3b6c5ac184bce4abe6bfd72e5. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QMYHE1100012.
Poncho Sanchez, Danilo Lozano, Adonis Puentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e135190dc60638db1ee766156d8efa2d95c704fa27355e183b3997cd1632519. 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/QMYHE1100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa74358b64fd3a66eabb939d82a5d931c1bcb314801ab352645808fc636bfe7. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QMYHE1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3168b0e2641c1247d30250bf90a9d59baee4065b3e4a0f6757506153fe2fd4d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMYHE1100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172aee128f1f3ab46861c9e7a8b424a11c0deb96f058443a33467e4bb8c3b714. 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/QMYHE1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee56368833094b947ec58b30cf24cab94c66d7fd63a1eed89d3e0469941b2e. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMYHE1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad9a4c507c13bf1ccac7d204582266b66c6f58ffb702c3e67a734a67b7b0250. 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/QMYHE1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea50240b7b1302191e80a51a599c6c95979fd94f231bf290659b3df83e2dbc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMYHE1100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532839df09e9733adb4366f0cf497b2c857d4588df6cd3a4776b0cd885d986b9. 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/QMYHE1100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bc1fbc0480ca80b29984620930435d053fe677e11c17d0e2e4aee61ad72d81. 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/QMYHE1100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac938113e2f057a295e203f9b1f1635d430e45f20aaa7292da3865c4e5e80bb. 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/QMYHE1100023.