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 0x122a8a781d115ef8e9d35e9cc7ee4ae752d2a12582c94b1f481f77ead815261d. 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/056840af-f098-4207-8f2d-72a759ec5e6d.json and https://artists.proofprofile.net/proofs/artist/056840af-f098-4207-8f2d-72a759ec5e6d.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 0x78bb683629624c56f1c644279ffef663bfb9a227e51591d42b298ac958e12831. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZDQH2004948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377c9d3b0c9e99363d850138abc114ceece6c30cddad0771e6d73bf797164ce3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDQH1807222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c36d6c3b272bdf90550df2c50c5ec485071e885d1058f6d11ffbcc843e906. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDQH1807225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d74c22d5eab9ca342c410c9b334a812932554d91e3063d3e5f5310b7d207b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:54Z), 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/QZDQH1807228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6940fa1a0574707b14d6efd6874b1fa61260a32ffe4df4aead6df15da26d7b0f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDQH1807231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c58ae4d5b0fd3512f34844eaae294360ecc75a30c8c1b7f392325b991639ea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDQH2013472.
El de Huayatenco (Corrida a Humberto Hernández)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3e0207939f5afb8a3ba595c8e606075ff2c37c0a09b8f4684417e8a4bf31e6. 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/QZDQH2204869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a17f73229b65003efd522dcb81496bd0f6115c749e9c951bb1c559e4c419fd3. 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/QZDQH2204870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606bedaff281a5f4084e4b84360dd1f4896ce4e4b056dc4b81f452f30026f7f7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDQH2204872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828bd837c34e02022b92c57167f8879aecbfc99f81539d56aef847905b6b1866. 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/QZDQH2204879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6427396708ade28690d5707a64a1601e6db36b792e083f7d42a07ea649497a. 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/QZDQH2302813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a73485af2d100aaa5fadd83446fdb187e89ee4a5d5c6e8c5e81bd5b9f0c116. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:15Z), 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/QZDQH2302816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec9c97c5142b6848d265c3b790990da08fa984592021fccc2c05213b11376f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDQH2400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e5c5f7d0292190959568b898d0f57eb690c2e412953f9ee6c4d9af04affdc6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDQH2400924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3fdde458cee2e5ef57c59f947eaff3b2622d0ca70891fa9425536e3778b946. 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/QZDQH2521322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0a12ae058948c59761d0a3b30613eb9954fa69916fe2b6eb2304fbbd83a256. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDQH2521324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e85ece1cc0af4d8d5dda621cf4fc676a116673a5d1099fe28dfd18b4777a3b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZDQH2521328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3188cb438e15f2ed73c8a6fdcc8a44ea8b580f50c374b6401ea994d24865fcc0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDQH2521330.