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 0xbf8fa10436bc5449c6aca1e784140efa936b1ecd3a5bcd61008f9450d8e973a1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92824eca-0e99-48c9-a862-3f63c8fc4083.json and https://artists.proofprofile.net/proofs/artist/92824eca-0e99-48c9-a862-3f63c8fc4083.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 0x00010e3dbb42586e05f8d7aa5e25c05ce14f624846e012d492c56a3371c34ba1. 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/QZTAY2369277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab92bb2e0d3f2704b50f8aeb707462ad840c19a6f1caca2aa7c62f65cf30c1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWQ2396448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59e8d4f0e19c6a31a735ea69f3c5040926bb2190a4e2fd8cfc5581a9e645b33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6M2397046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3a628a46ca5ea888130fad806ab248600deee6cabc15e8dcfabd1f41f3d009. 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/QZFYX2251521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a59bd679cdd200935a1ea773bfc07b5b6f956529d74d78421e92a320b71c99. 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/QMFMG2335069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b64535a0755b7f71cbb2ef1037faf18a796a5d5cc5e725c70eb6c4733b497. 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/QMFMG2335073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac29759fbe8e516416355a4a748cc1135b58ea084a31b9258b57df4598eb54. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBA2336874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8ac3386a76181fc4dd8395f714e40c9988c8dd363563ba10dd50248a488aa3. 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/QMFMG2335077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00010e3dbb42586e05f8d7aa5e25c05ce14f624846e012d492c56a3371c34ba1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAY2369277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e6240a71726887705ed9b775f2c8a96a111077bf15515a17b644319df1b4b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG2335136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac29759fbe8e516416355a4a748cc1135b58ea084a31b9258b57df4598eb54. 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/QZTBA2336874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76286eee480af7bbca185aa15036abddf9ba1e7fa7433d2a5bd09c588dab4c2d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZHNA2352768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f17dcb1a30aae26e783290cb992352a7b63914008de99743ad5a01d95b7ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ32302820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6d6e5f8808088e04e1e02874a3f3fbfc8e6734be0888e759b399c44242e58. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB32287172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f59fc9fd230a42a14b036c53de5d111d3c034ff30cc88268fb242b5a9ac95f. 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/QM6N22457992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce893210a40033e877fcf19e4104163806f942b5794b7183efafb65cdafe6fb0. 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/QZHN72464643.