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 0x25ce171269ca8087aab180a6f4bda1a461a78b8f3c80ae45132f1c71c227d67c. 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/bc57649f-abc3-4b78-b74c-02fb5aa0cd02.json and https://artists.proofprofile.net/proofs/artist/bc57649f-abc3-4b78-b74c-02fb5aa0cd02.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 0x755677f47a7d976d0e8cb7c4118e31b45a29bdafd7526ffd7c7389c9e8733823. 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/QZWDE2344288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd198c88c2d8eb5abefcb34613ae84e8e82ee517e51e03cda12c123ad528ae0e2. 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/QZRP52448655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3cab0f6ecfdde0df42a76e3ad66897e380691d1a4065ff8b898530dc8143ff. 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/QZDA62517143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a85833bdf7a4c9e46d2aed6095f2f132920b02e898cdafb34ef3ae0a18b4e. 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/QZTBF2459166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe215226496eb064e8124d62c4115f20b1e5604c7d6579c30a9212000ea84fa6. 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/QZZEC2452316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ee51582e281292c5634a6d97e6bba361abae1347fb367bd898ec67920f1ef. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:43:57Z), 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/GXF9Q2598424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607a5c322dea6b104ac313c63710e0107b16d6c80afd2d88181ea71b4e82c707. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZDA42508262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926a53b6a7eb18be46ddf471ed4bb4c6abff363f7c9bc77a66453d90b212dc01. 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/QZDA72550498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dd0b6712d6e538128d6c492a30065cb40b7ced53670596cf099c5b87c8d440. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:32Z), 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/QZGLS2555174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6decac9efa53283c3c26d27029e355a8f7a7b440ba4d8f6313658b1e01e2cfad. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ8A2538602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500d47ad440710c689fb661d1fe0308e4b4d43eaec8432010388c027e0345b1. 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/USLZJ2440841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5898297d1d5f799b4bbb6fe087c1f9377d897c4e34a812b96e4d784adf051c1. 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/QMFMF2433790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9242726e06cf6d291db72d54fe56c66b8d346183c4dcd000405883ddb1ece973. 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/QM6MZ2510600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdbc8b87966a234809af373f625682f51d08d67ad3f8be817496ddc91a400b6. 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/QZKDT2400658.