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 0xbcbf407287d72ff2908fe46d32dd89af704caa4af77cc5d84c6868138849f26d. 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/41f64a4a-76e0-4601-ac63-02a9a44e87cb.json and https://artists.proofprofile.net/proofs/artist/41f64a4a-76e0-4601-ac63-02a9a44e87cb.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 0x3824621cbafdc2103271098703e6eb263038d2907a0a23cd233eb8123e350c59. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEOV41701559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d5fb8f93ac488754e64863c53b4cb0c4dea413439e724d21ff6f4873fddea. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEG102010009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9d397c5f9fe415c3076fc74ca5b90f262266438323075ab46dd7efed4df9eb. 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/DEG102010004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a7467e9c7e01dc58cde04fc9a72c6d0bcdf80bdf13321528cd74f913762f5d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEG102010005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b5e1c2e2e83f894d7a3496bd7d6cec64c022166b5f908bfedfa89b803cb57. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEG102010008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3813311f5ffc2eebaa34f394b661c465db2dc3b740beff744a897362277d9192. 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/DEG102010010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3991b66c0f1bf6f33def00238f46b51e6710831b97a9d3472c24799d4ed4f1. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/DEG102120003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe53f21144eceb5e3c56d89ed6321bceee9d39a29ce17156f88edd30d951e82. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DEZC62255542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277eb35548c8143067c5340f1bd14b14d8a98ee74afed39bac23cf05a25b8b9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:23:46Z), 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/FRX762323430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee24de5504db7055bf76aea72c74b6789a2ff10f9cfc0228fd06d6f5598e7ef. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR10S2358217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906cc28dd1e289774719ec17dbe5a50973982dc942076d51dea4e05314f0757c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA062370340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79536f9c6a90292e120a61719a774746291988ca3f34c1488505527df958ea2f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:54:43Z), 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/DGA062370342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277eb35548c8143067c5340f1bd14b14d8a98ee74afed39bac23cf05a25b8b9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FRX762323430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330edf5fd3521ead918ead03eb976fde4bf1579ab0516fe38f2a67d53f0bae8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DGA062370343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f48e0365ccd76e6a5058d59239171b5410b7129e92bf8650df321d94b946f3a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:03Z), 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/FR2X42475992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64311c313451e834dbd613eaf0aae7c65dd32833a42b0dd0f0c00956b7abcadf. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR2X42475971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e86d9d9ddfa20087911fb84937417c746945d1d90a94e2cf36f846783e3ba. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZHNB2519459.
Saints & Sinners (2025 Remaster) [House of Guinness Re-Release]