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 0xf4591ce2a813b9f5c6d20ecf2abbf18dd17b4865c9d9720f8fe1d774993364da. 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/fd3ba214-78a6-42f7-a626-2e119fbcd973.json and https://artists.proofprofile.net/proofs/artist/fd3ba214-78a6-42f7-a626-2e119fbcd973.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c0ebef2831173e3fe9e69b7c74a9121e360b97e6ffd163bb8f3149a3a71445. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:49Z), 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/ARF100200457.
Antonio Tormo Sings Old Favorites from Argentina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a6b3127962e302d0dd36d71fbe0aaf43712dfd1698ea6eab6a252a18f390f1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ARF220601628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa607e632d633ab6990733490f7ed471c866ae92eb7a4666261946aa5a152a9f7. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ARF220500614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7f245514b00b532cad963ef1887220d709a81e8165c11fa63e6cde13f59c27. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:38Z), 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/ARF220601629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00e2ac0663f616dfbfe9d440f3a9c7f488b07370344c5b79e30fad71a8a170f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARF220601630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae004025cd0f9fcf419ba6dd9eaab2b0757962c7c0f6f437e31bf1ece01a3079. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ARF070700263.
Los Mejores 13 - Folklore - Antonio Tormo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ba90e0c053904f185d82ba0d9c85eb73de38c6daabf825ccd557c32f9e071. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARA821401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620b2dd5c3f1577b38e21adf215fec84e68686a6574a6aca819c2cf4ff442cca. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:27:36Z), 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/ARA821401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3d5e91b006e2cd173df997f37ab9fe72e74de0f9a10e8eedda056ed199ac8a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:52Z), 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/ARF221510695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e79da1d93f401bd9ecfee96853950e65492f18a02836f248e72be0ec458cef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR1973692.
Zorzales de Antaño / Antonio Tormo Vol. 1
Zorzales de Antaño / Antonio Tormo, Vol. 2
Zorzales de Antaños - Antonio Tormo, Vol. 4
Zorzales de Antaños - Antonio Tormo, Vol. 5
Zorzales de Antaños - Antonio Tormo, Vol. 8
Zorzales de Antaño - Antonio Tormo, Vol. 3
Zorzales de Antaños - Antonio Tormo, Vol. 6
Zorzales de Antaños - Antonio Tormo, Vol. 7
Riendo y Llorando - Antonio Tormo's December Milonga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83f8e54a4ef37933f1a8faa75bf69863b9cdbecef0d961fc33d254708999466. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCHR1312957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173170f746320951bd24e1a55c81332a4bb3610875b09331fb29bde441cc5e1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARX459600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0641fcb3fe637dcc827996050c9147a0dc3be45de56acb54cb9949514aace9. 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/ARG991010471.
ARGENTINISIMA VOL.8 - CANTOS DE LA PROVINCIANIA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8605328d1ed40e23b0efbccbc6d2d8e3a40d82b465566db38d7c533b9aea9e7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ARF034800012.
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 0xdf754532306ab6af5031671b3ca7fb34a6892f5d0f89de773d5badb3f0cebbbb. 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/ARF034800047.