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 0x1cc1002ece6a834a471ce1047589b1ef2cacbf59fa4b60a257367e9a15eeb5cd. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/163c9ace-a6b1-4b9b-bafb-4eff31dc8410.json and https://artists.proofprofile.net/proofs/artist/163c9ace-a6b1-4b9b-bafb-4eff31dc8410.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 0xa5a6f5ca6d5c78a4ad1cf08931f51307403982ad5e9fb23fa8fbd98761d89bef. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCACD1550901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935939e21c6ad10fd0acf11d7dbc3eb0570c366351d1a67a7ac49abc71e5c22f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCACD1550959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc569ee9ac0bf1e866fc3d2ff095fa69145a5b1dbc05db30dfaf94b6ce4a621f4. 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/TCACD1550960.
Um Tú Hevur Tað Sum Eg (feat. Kristina Bærendsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf0bf777052285b931b2f85a6c07dfc8909ce1e80e0d2432e89a31dc76ea7e. 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/TCACD1550962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9023b6f0a9084d28d4a7a67d5b9b6724dfb7ea6f46e8f90aed8fab767f0941. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TCACD1550967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b92a406d90765f9724dd275f7dc9a63cd7c624051c1bedbde593a2dc569a93. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCACD1550970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ebcb550bd82139c049d957c0dcdbddf691c1db48572bc70ed63163dbd81273. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCACD1550977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479d14b1a6a5e9c4299896f6adeb69d5ee1f6c78b04d0738fabaf06e353ae89c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCACD1548143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d46ba1bc3a53d2fa4a8ba9b26b1f1468e8f8eb3492bb47e83a4582c3df4282. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCACD1548147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eebe92d5129a856f30d2567713200a6473ed07ff776cc49b461e37361fe7e2. 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/TCACD1548158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64eac1a7b94ea09bbfe0975c4d87a16970ff2e5bfb2f68a242dc8ed205a4c58. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJN2529004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f60add58918350acf048fb484dcd0048d2bbb55e04efb1865f33690a5467d2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJU2573803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4159a5af6c2dc46d90ce185487db11f7a89b0555e32670cdb754dcde047a0f1. 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/TCAJZ2586094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b45cf52fc550d5e51de9df79d7fcf45ea74ef11d891fa5e581e2375b235b25. 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/NODGC2101204.