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 0xfa3bdf78474fa1253a70ada146d403a723b3a746cc705b006e496836f2c9e6ce. 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/d23dcd71-4e43-46cb-ac5a-1aa2cc811bc2.json and https://artists.proofprofile.net/proofs/artist/d23dcd71-4e43-46cb-ac5a-1aa2cc811bc2.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 0xfe063360a7d50ab326711cc1e303f60c88be2917b0e8930b5c557abb7e2fce0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBUM72304746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e3520a17d0853c1218e9ba84b033bf9c85477e2fe441df00fa701342d3dcc. 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/GBUM72300911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7017b9965ae27513225e6b05b5be730f6da9fa89aecb16ec58f54770333b9e7. 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/GBUM72304772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20273549345df687df2de9fc25338638107d9790a27d27151d89260f32ae011. 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/GBUM72304222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f541a80e9be708addb38be2dc90cd9deb52188b153734700000a47b928abef. 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/GBUM72304774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7155b35d1fa67313d3b03afdce4e0c5c758b10021db4d4ddd114a5d2fb3b3639. 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/GBUM72304804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb4ffb522ffed80740e843419060cd9acde2489ad3cb2dd54983f2c45c28e72. 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/GBUM72304806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a94abc48748fb9f10b384a3463d4f7408b39b2d1505bad719172b53397d5a. 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/GBUM72304808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0631e538aa89160836f3c09f6ad817c20bdfdf1d3cccbf685f578041a8371. 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/GBUM72304810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fe85a8e178bc4c3bcc036d7dd419c70d99d7a8f745a503393cd2241fb3cce3. 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/GBUM72304812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d7c7aa352b2e2534eec51c439b44ffef6bfb1b512c82d0e4acdb97c0cf0c8d. 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/FRX282162400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c5688c5d43e2711b602ed80562f3eb11e14f85ed425dc412d901120801c66. 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/DES232400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129faa3f05e0b0dacacce349f3226c6b17f8463bf05d4500f217ceb6f6141090. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DES232400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3523d9e54ad0fb21c7e085150a840b525302b4618094e4ed2747b17930490891. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZZOPM2002924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93154c7f13ad1ea287a10eb2e3fe60ab811d9bb1bd8f68ef359b91195280ab5. 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/GBKPL2200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d28d1b7733bfa0cf1357b2329f431e9958d00b75881f9707d354827d27c8c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF712208018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53bd624c6a5ae92421c8e6c84c3771ac30bdf4d31d2a1bc4667715ada64a0c2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLF712300866.