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 0x3806626b0ae833fb2eb25a124df08c1a17a755ce6c63233de3a0fa675691daa3. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37b9da66-1f86-41cf-b669-3d476321cb59.json and https://artists.proofprofile.net/proofs/artist/37b9da66-1f86-41cf-b669-3d476321cb59.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 0x080f5803461d6910dfd734b748c033ffd4872f879f88b40ef4aa57c49423bf63. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ROB010801053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe6e5d89cda7720cda3d25be984b8017e713c61d910bff194fe821e6ec89421. 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/ROB010801054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7fdd542fca7b1c2bca1d5c772ed54828000616b281346645a3cc8df2310cfd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ROB010803047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071718fb0365b083c2a980999b1ff645448215e3510ecd64bf9e1f55d01052b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ROCRP0800666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071718fb0365b083c2a980999b1ff645448215e3510ecd64bf9e1f55d01052b. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/ROCRP0800666.
As Vrea, Tata, Sa-Ntelegi (Father, I Would Like You To Understand…)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892014cbd4d12235fb1384be2a22608ce8e1938e435f7dbc783d71f89a28973b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QM6P41559877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27da7062a73e2e91da8e7b95773ee4086cee17883bfe70519fbec18fd8e893. 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/QM6P41559882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f628ca7380255d4713127e980bc9962e160b13f1a81f3bd55a5fcbdd3bec79a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM6P41466726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98d8ed3abea283fc55ff295beebcf0d95a05e85fe0432865dd7b66ce714b03. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P41466727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b9975727ed41688fa9a9f396ed9361b5a7406d0d6ea9a460aa133eaefc8379. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6P41466730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f3df6442e76df19809f4c57c74b35560e3550092396158a6ad4da795106db2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6P41466732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac92b8440241abf5ad13c6c3a43aca7fdab6a0964b51c3c492146ffc6fec1dc9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QM6P41560193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c75f59b200ac5a499bfb26473ffac54398d9e925da5f096671bb3fec3644cc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM6P41560198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300de58c9e77cd29b9f36a35d57ace0bfb633298daa013ccc7ff0782c112b16c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM6P41560201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8c7a2e2dba11bd1f32c1095215ff2b94679756b3231a23635e919eb7a6d304. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6P41466516.