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 0xab56bf8b996055ff07198f3e8838db183198d6737f794525c11a47dd6bbe4924. 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/8b792bdf-d571-4725-9fda-bbfb2833b9cc.json and https://artists.proofprofile.net/proofs/artist/8b792bdf-d571-4725-9fda-bbfb2833b9cc.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 0x8838051d9243c146dcb99fc2d5289b0e64f48d1019587cd78fe2300d8d40d4ba. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/ARF050500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab42d7afc189ce851f8778c34d5a5d92e14f8b86824f10025b8571ed499ccd7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ARF050500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fea1823eb87516bd605a17e6a9fd6b2501c420373a5299499ac1bdc3cbfcdd. 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/ARF050500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641aca236834b072a03613b1ef275a94eae091ef78c055d056aef9c33079c745. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/ARF050500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f4b028149e6fa8eef4c80ec233ad5a27640872bcfa41e491058ee239a0900. 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/ARZ021002859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9401fb86898d2110c29dc65e05ea1e253817c52e27d3e5742293728ef39dbb7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARZ021002856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40271e595bfd867600c20cdf15c7ad2e8b00230cc383951d5dd848557543a49d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARZ021204253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0c289483b232e9cfa00c9202cfa75ca66d1c9bad2a0a06fea2fc42cc315cee. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARZ021500394.
Raíz Spinetta - Versiones Folclóricas, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16630346f2a7c4a40a8cd76aa020189cc8ea8d9393448bb5f59c0eec4581cc3. 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/ARF391401526.
La Pomeña (feat. Suna Rocha & Lito Vitale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2196892e79f042f762ea3b2486b5c702056a72913247d78baa90da2de3c17ea7. 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/ARG601013582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd821d2e894c906d6f78b090cc43d5f3a0328e014c6c2bdd5574af6faab7da2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ARA190500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91cc3191afc640fb42762f0b1a49d9466b97f4617e4ee1937f751f6c941cb3. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ARF391101045.
Por Esos Montes (Vidala, Santiago del Estero)
Grito en el Cielo: Leda Valladares Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429144965d46b31988319bfc359e9fa386e217df7af89f3dc2c9843659f67945. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFMF1581817.
Pedro Aznar con Comparsas Lirolay y del Mollar
Grito en el Cielo: Leda Valladares Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb0d5508065ba1e1156429bca2826f1efae2a9e86b0c9cfcdf750db5fb6c7e. 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/QMFMF1581867.
Carnota Presente: Homenaje a Raul Carnota a 10 años de ser luz (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a1a3d14b12dc59daee3dbe1f68c32bf415d7c202c1c0d25dfb093996407e1c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ARCH22400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe281b420ca4766d9f31f97502901a8153709bca4aea5a385d6da0da72ced43c9. 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/ARCH22400088.