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 0x0e6a70bf98592210862f03bac9cb88ad52b87f44178ac0e0b6df85ccadbea9db. 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/27c5d340-4352-47bb-a534-9f49524c992f.json and https://artists.proofprofile.net/proofs/artist/27c5d340-4352-47bb-a534-9f49524c992f.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 0x341e85b1102ce121ca2b530da5793647ec5d68f6e5d00f085565fa134bc2f71e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLPP22200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8317e27e09c263a6911457bf13e609ede514eb90ee64ec69a1b960fed44ac15b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLPP22300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d5d96d852d069ba446a3bda951d963c8459ce311edf8e3077c0fdc10e2a7ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF062000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ec5005d72d503c345138672991cf719d85edcbd81380247dfba31471968c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF062200465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61853dad813a215486d07c6fd04044a278f8c396a6c25bccc552192b9f0160bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF062301671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5d414902bbf5c04cb860c056f4cbc37f5691abcbfae99e8ef682ff04ddd76a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARP7V2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8317e27e09c263a6911457bf13e609ede514eb90ee64ec69a1b960fed44ac15b. 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/CLPP22300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9fa084822f219f77c77e7cea0c4ebe1d6455da1c2b323d5736eff946d0b8e2. 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/ARF062000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5d414902bbf5c04cb860c056f4cbc37f5691abcbfae99e8ef682ff04ddd76a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARP7V2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206767333d4e2293324a3ac5e428d9f9bc8fc569b0bd9ccd31a22c55d5eadfc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF062300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b142a7f0835b209864e02dbcc76cb7f6d00e6547644d202fa96b5e233b25207. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYM122200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2df2a1d56065e39a695de1be8ab4499a8ab9ec722967144808df565931697c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF062200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fadb68ede55962a2b26d1ec314636bf50b2d9d96d55433ace6c3a8120a67e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF062300642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa29b2a08d44a8867b242224a8abf7e415f9243e4d500ced54f163737125bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF062300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a2ee6d1c90edb68e178bc92f263bf2104edfe8793cef852c2c57a6e9b8acf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR5TV2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56352f842ef32b1c3cd5946a5a38c4517f9ae14d7eb20f8842d539304b3af1cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLPP22400018.