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 0x4cedbb612b5b57ea260aa4a24f097eb9ec335e11328b83db4ae3712eb671d56a. 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/dc321316-be26-452c-acf9-d4e9505a2760.json and https://artists.proofprofile.net/proofs/artist/dc321316-be26-452c-acf9-d4e9505a2760.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 0xc59914c1196bfb58965b7b8e0086005697f76365726faa46f8facb3c18ff6a94. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES71D2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b922b6be5ca33f354a515e9d6a9bc6e180c4943fd9618ef49d816b69ee1546. 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/ES71D2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c518928337ae337dbe6f6c2c9ab9321f482bf588ef607e82b4497bb2a3fe48f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES71D2000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b949237415cfcd82d1bd1a40d95e442f4cdca87b94beb34f4ff25e02d1d303. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ES71D2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d1e877f8b8878da6e814083f686f130df43421f84ea3aa64b64d3b9637100d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ES71D2000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9fb6242faafe3aac910236e182e634c6a17b5b1fc06b4adcd91379b854ec6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ES71D2000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3280bfb1d728eac0835299c4d86d9a96b3d1aabfbf5f449d408d77762190fe. 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/ES71D2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc6792350642db122da8ad0a97ab8ea1c50afb8c796b2b4c571afd6d23d8ccf. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ES71D2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c295192651229fc73a6854e9fd11a66f1758ebfb0f49f719043775c12519c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES71D2000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517a67c7c272828e6fd3d02b847cc0513face2b65b85e8d2a44e439370645874. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES71D2100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d50d38f49a11a5c1e296e3643d54422bf8d36851e3fa1eada0fb8632f153f. 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/ES71D2100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62a47798e5c1cb8dd7269449fdfb0acb6f7ab1a01aeaa51269cdf2ed35b4da. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ES71D2100235.
Patrona de Albayzin con A.M. San Isidro de Armilla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d05914ac7fe30fd2da9590ba8e8684c9eeb92b0d2a3c84b02819071ef1f67. 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/ES71D2100238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a901fd05ec0e3378f5ee08476eb5bd1ea2f11813cc510497ddf62db260213. 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/ES71D2100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0373875849ec077937c99246fb0740baedbbcaf834fa4198f80008b44af0b6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ES71D2100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b2ebce6d3ea073efca0bc3980de93faacb90356ca3c0f7162db53ada87d369. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES83F2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b785f4a309c7e40eeb52e9f352c861f3621e3ce96b890072e1e98166929cd. 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/ES83F2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ea513d0736ae5ed73c9c9e802787874326bf72a43878008abb9f739f04500. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES83F2400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687499108e0d34941c81bb08beb897c40398249b95af6fea6674eaaa906d40d4. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ES83F2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7457d573f39ef3cdc3c7516a932471255f37e793232544269dfe7a986d72ce9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES83F2500058.