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 0xbf58e925512fd8af12ae38089ed3ea6cd942f1bf110552e91c818b2e4cc99c37. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69808b71-5fed-40d2-8f55-8f2dd5a51503.json and https://artists.proofprofile.net/proofs/artist/69808b71-5fed-40d2-8f55-8f2dd5a51503.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 0x5d73dbb37783fdfef09fe3e3cda310790e4f49e2cf50b674b5f6f0e9c891dcc7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARHXW2002655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17e59fcae9e673e2d15399dbcc3480df9d45a4e2599e5b1563b1131a0175fa1. 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/ARHXW2002657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802a48a78915dfcc7df67601838dd1d7fcd7ff2b659febff3360704eb1146aea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARHXW2301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74191cb863405841c097e2e97b99c52346276c5a7d4a92a3eee93d83e4a5178. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ARHXW2001679.
Intro Biromes y servilletas / Rambla de Montevideo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a815733d8e3c18ce16ebe31ab81f3eef7c5bf2c48b0617abc45fd894677fc6. 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/ARD192400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622723d753349c704858a30cc817b110e46565a4e72629abc03b69e27ef8a234. 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/ARD192400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d08115fea6e34965a37dfede9b6e59d7052f4cf00c3664e917d2d67cbd7cb0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARD192400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9779a55aca8d3b91b53687326687615cf1a2faadb63d18ee752493b130bf1270. 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/ARD192400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5134317bda893784b9f301664eae6922dc68306cad6e3c9956fbb6a2b563a7d9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARD192400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3688bc5f242828b7d4125a9a8de20be834d8fc23a6626b0be5f695d799e43e1c. 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/ARD192400007.
Las clases de guitarra de la Señorita Cunegunda Lopez de Garcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f00cf4532f1092f199ab24bc5d13abbb10a02774763157e547cf0c67e3050. 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/ARD192400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd09bf309e0775053f0ff5030d14a867f39ddc372ce5ba60198ea7bb921390d. 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/ARD192400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4728c902b249d66ba4deda3a69d26b59a0cf83404cf3d6617db73cf83f8fe341. 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/QMFME2165329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd35ab74ca53062deb0282215150313c733e1a9c8808efa121a09be25ea680a0. 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/AROAJ1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311dc9894e62d4aaf8fa6fa695565e479afe050dc682cafee644699b4aab4d6d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/AROAJ1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f27329965998a7af02d68038490db9c0b55f82e051976858ed9e0016388ffb1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/AROAJ1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586c6b5f144ae2c71cc2e0c9fa537cc32e1e88cd86a00830af861ac3b0d57507. 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/AROAJ1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005c4f11fecb5b4778f7eb41b38c1ba59fda07f4ea06178d4b5cb12943ba371f. 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/AROAJ1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cafdb5dd4e4341197056dfbcc3b3535e7f43dfcd84a6babab2181ab5002fd9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR96X2129041.