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 0x731e8c1993cbc94e83008ffebf1e9709edfde8cad2d2da383cf9f293a1faf9f9. 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/bf4b1c00-26dc-4bb6-a251-bac7e287fd00.json and https://artists.proofprofile.net/proofs/artist/bf4b1c00-26dc-4bb6-a251-bac7e287fd00.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 0xf4531e4fefcc988b07276e066a096b961db99016b074f3e1c17bc51d38364505. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USDBB0951142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aecf0b56c2e334ce9d9778a80157aeb5a386a9d661f959de0a776b264d5123. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/US78T0503120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354d3a1dc238d13b804856bfabe1a02e98558c18bbae972511878b9c5d898225. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US78T0505797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ccfd1601c91d9a330ce952df44439dc387c77b37b0ce767788698ac78ee0a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/US78T0505659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f19b5a74f00f2cfcdfd725b572cd63e5a52ea70e2b39c2bd07e6acc8f010a8. 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/US78T0505663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c193bae3bf00dcfbcbde01249d2e9d3c7f6cf517f29e1ca48c48478451fcfa7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/US78T0505665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f76eb06e7f4ca97d21f0f5d9fc6cad9f148b0e2c861cc5eaf021bc3a9684e2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA371435042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7632789243e94174d0222bcc82f9a4333e6952fef46e3368013a035df9c1e0f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USJE61702787.
Fichas Negras (feat. La Sonora Matancera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366999fc3246487df728ea7f701d593fdfca11a0d20d1c1e16935d2c236a140f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US6R21227210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84fad55b7e12d1687d27061153ab4e23d0ee835d6f28d2d017393df08c3cd57. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US6R21227211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b5637dadb340153068eaaa7624e48ca2384a3f93492f28596a4c981178e1ad. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/US6R21227212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df6205dadc678e2c0929ee202f10720350af3bc3e9301a0f78dc2ea3dc3b132. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US6R21227216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb723057bf909171b3ad447c1ace4949f1cf16001f097160592b53a7a217861e4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/US6R21227220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160dd3aa6ba0d2ddd9d6142a0313c9235ffd4d402babab0ff1dfa77202527872. 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/USY9R0804797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1a224b6d62946dbc5381ae5a8bf958fe77373b26363dfe6cc2d695a3e4bc7e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USY9R0804799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e275e451f6d47c9d9604e72f0d617bd720aca4ea1bcb0eb135f38706a4ad2e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USY9R0804802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd9cc41b6f16a43794c839bb1b2467ff810409b3a87b92e191ac91c462e8c0c. 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/USY9R0804806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c689082c302679404acaee41bd870db372e5694ae874a86e19eca29dea732. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TX1707057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd544ffa34e81b15368458efb56fa9ecd3c39cad3d8b18ad9fd8cf5bf1bc219b. 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/USJE61702778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d3ea63a95787d01a6d0c24286dd63649dcfc8f6a821fa61df4f4880ade33e. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/USJE61702782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb467a3bcfacf3e8a7874758d24686fcb11a86fea1fe1901418e6c6321a2613ae. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USJE61702785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d322e7e541e3d4aa0c466fcd8ccbebe35214dee4cc28fa5d9a193510f27742. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QMDA61821923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d907ea3b9e6c369fe0187c1067e60356cd3e2587554386a154bf23aa6b651a. 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/QMDA61821924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6b0645ee605e6a1c653522081199b2edc5da2a1b4a395caa129783022ab0ba. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QMDA61821934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2ac54ff9eae4081477962c6567975b09f8f4e151fbc422ed688af8de3fa2b. 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/COA6W1800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c168cc7f1e06078e662f67ae70f0dacb9c1bbb0062b916890066c041160958. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLHR52114700.
Añoranzas de Antaño - Lagrimas De Hombre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e57035ed90acad3e7d1923a60cb6abca05e212eae00cb67c82da41400fd5daa. 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/QMBZ92399884.
Essential Classics, Vol. 381: Leo Marini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a79bc8aa42b2b884e76788a45cd4b1596fd82775b8356d8159e3bc548e6ad12. 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/ESA011779562.
Las Canciones Populares Que Usted Queria, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24666f5bf760f0f919654fb76e825182f4b15170478d2664c735679da179ddb4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N21464250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe308ae583d00d188b5dcb53cd7ef4f508d9bab8ab1b073258c80a6d867f44876. 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/QM6P41556824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f19bbeb119fded315656e34b14b7f4d0795a70444d84b7d1502d10fc9431ec. 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/QMFME1535298.
100 Años de Boleros con La Sonora Matancera (1924-2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c73dd61e1b41596bfa6f5b770b473e2c12774dd66ff9512348c4b32ae4629. 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/PEMG95001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212da4f5194c20f042505c66c294aa3cf3f1410326ca863c3a4f95d4f4784bcc. 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/PEMG95001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb9ecf6cd4984a0d1b71101703a108147e5318a2f3787ef03d93dcd3202a6d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PEMG95001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08a4170e6fb0d81fc14b4964036a815932e0f9327974ad5500c925ae590b3c4. 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/PEMG95201004.