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 0xed463e2fef12aef02bcb50969374365d7137689de0c002ceb74d6d5bdbd47244. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48e43657-e037-4649-bc81-a93b5a8a5dcf.json and https://artists.proofprofile.net/proofs/artist/48e43657-e037-4649-bc81-a93b5a8a5dcf.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 0x2b4317221508886cff9db94a92c3b7e377ce2a5e9294d42591948e70868bf640. 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/UKXN22170888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad66f0d7a7930629d6effbd0519096341786cec2695188d8f6b22f551313f57. 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/UKXN22139836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05736424ba904df7efe2126dedbe498a4e7ab72aac5499ada3908d08a3cb1085. 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/UKXN22170911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cba07e646800fe0b678c75aeffaa4ddd4485709793a1891c44e947e6b5ce90. 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/UKXN22170930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad66f0d7a7930629d6effbd0519096341786cec2695188d8f6b22f551313f57. 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/UKXN22139836.
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 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/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 0x4d6341443ad6640dc6e5ce11a30834c7f0ef1a17c7deb35b23ce42b7ee313184. 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/ARSER2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3628094c3fece279c0aca627e711dfc13f871ac44ac8cbca445fa5396ed59d. 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/ARSER2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed722ae1698b45d22c6ad5f0dd30c9226b102e026fe46b4cfb26ecbdf63b14ed. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ARSER2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a1442f3923bc977cc89024067fd0573b98957443d3d0d204d562c71b772a37. 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/ARSER2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c917a594484dc830d589e01196307cf2dd60ba99884e747b2cd74cb03a2067. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ARSER2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c1feb3b242cd23ff2df16eb9f72c2e6519dfb967f37da7143b5de13b5b6ebc. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ARSER2000032.