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 0x8c4881d6685f9a71c504e33de1a081e85aa7e956cab4ae43e6f07cebf435c36f. 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/f5eea00a-6088-4b49-9b06-d08bd2bbf0dd.json and https://artists.proofprofile.net/proofs/artist/f5eea00a-6088-4b49-9b06-d08bd2bbf0dd.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 0xc09ea0fa34dd42324695e9ad2c35a4f4a63448a5485db57cfe177cfea0cf06fd. 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/QMDA62341218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f520b72a5aebdc17774b8f61a12c3a49add99626d13bc7d01cf85d41b7c8cc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMBZ92309456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2ab25b451365e5342872b0c5b83c25e97fe5aafa05c55e212b307c1f7383d. 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/QM4TX2308526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce58618b7c0d5c6f3e3daadb12af9403e4cf1550092fbe19c29fd6e4eef2cbce. 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/QMDA62290005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dab63e3462c029806e9c636a8940d94ffd6e02539db6b43c72baa6eb913031. 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/QMBZ92299287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dab63e3462c029806e9c636a8940d94ffd6e02539db6b43c72baa6eb913031. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMBZ92299287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603008b2761c865fb453bc8e52dfc7101372557940e1984e9a2664618d36dca1. 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/QMDA62102413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b56e532f77930bd06d9380ca458a73154e77910e544d9e0b56911b13977e1. 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/QZLBC2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e979513ab7bd8822e7340482c510d7eb494ae68ed1f6865138cbadef481a3. 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/QZFYZ2104092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0817f514a43bc4580911542acb31e4371a47ce8662b9594c540c0dbd9ecac192. 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/QZNWY2048472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a04ac03f38010d5f02234955244d64d2b2f6fc265a9c516c93f1e554180c8. 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/QZNWQ2069944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd953db148cb8756ddc97df64881ea5547b44172b26f7e93dfe2c41839a21f25. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBKPL2007179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e1911f103a4aa17e8c3c9dd7f9a5f7c61f447ce71d65b99442ac4534dc9e64. 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/GBKPL2094516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f938dac36feef297571445a955421942caca70b64e5fb84d86297903dda8e. 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/GBKPL1961638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f00018a055ea097a3b3d599a25ac36aa824ae61876502a85234c04e25fe89. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKPL1965635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e90a24118e701f11afc4d202712fb6a0966ab11e060b090ddf6160be4ab3084. 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/GBKPL1973773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccfce9b6f719879854a9cd815cb418f9ef744dc94c307c3c7c9a9d7c23c763f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL1973771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb566960a7c6206e9cbfa7d30a330a9e5ca94d548a193a4d5308e710e264282. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBKPL1973772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f00018a055ea097a3b3d599a25ac36aa824ae61876502a85234c04e25fe89. 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/GBKPL1965635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f938dac36feef297571445a955421942caca70b64e5fb84d86297903dda8e. 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/GBKPL1961638.