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 0x7dc8357f143f0fee53d42c1dcc002e1b107a7bbef55fa450ee22f24b55e47769. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/400a4c18-2590-439b-ba8d-3c18527b4ce6.json and https://artists.proofprofile.net/proofs/artist/400a4c18-2590-439b-ba8d-3c18527b4ce6.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 0x0c7f16e16417644c5b2aaed8c6313bb7f0dcea50f8caba430af7991d81ce0c28. 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/QMV6P1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3683b168964ac62d08881ca9214506d1415d3ab9b2370502511ff6a714b4c5. 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/QMV6P1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0bdbf02e4da7bdf092a8dbac76ff34c59403824073f061444ad4feb68ed6dc. 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/QMV6P1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe005455f0c6d64a00957068c9b350e75533d2d0a77feb9822815d25f0e77597b. 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/QMV6P1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476cd04ab49bdd4c587e5f463f04db20f97bd453e6fc139b9963482f5324019d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMV6P1200001.
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 0x6a004765c6cf61b5a3a194bc627422c197d15310e992734d4ae9424de970df42. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMV6P1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1cee1da2f197f8ec6a814c24ebf7fe6351a5986000bb5d4e4c0400a8e6cabe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMV6P1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b979eba89f0ebf41afa714416324e7dd3a35424ff4fb0db22ce30963b1ddbfe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMV6P1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6857f95c1d98c30387f6589a82e32433a2637d5ba26de8b065ba5eb94cf372. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMV6P1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75005e70f464724dc90af12be849ab4b76bb7c2790b6381b0284a1b2fcf8372c. 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/USK440800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5520346092cfce650c7165207d9b2abed0cbe15ffe506714ff0bf1bb0a96fd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USK440800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e82405542f0e14c2b24d81eebfa7c7552a8240f3c69582ccc4a8c6eee70ceda. 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/USK440800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc937d792ab8af9a26a4911c10697f31eeb1c40ce02e49cc2bb1395debfdd7cb1. 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/USK440800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c47ff1322ec73e60bffbb8d9cd67b4c254b86885450a15a35c4feccfc10327. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:29:16Z), 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/USK440800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08df0446a2d8c547856c100334f58efa86992e50b555b7cf3bea43d781f781ff. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USK440800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3ff371a2b50e758f0599e62dc9d8934f0f7ee7a4306152bed537dd53838ddc. 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/USK440700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea23ec5f2d993f9301c4d5f4e6f2c493a9d10a1380a7fe8d2b862b8391e7373c. 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/USK440700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438db6d0672b2f49b291750db3a3c8da11fcfbe9f1dded4ce37750ca27d4bc9. 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/USK440700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110b688e07a5fd84658853f8ab240f91b7fcf40570551038285fb5869fe9854. 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/USK440700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30c4f177c0e040ad0b24e43fe536c97ecdc6656ba94cde2d11f5bff6554c08. 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/USK440700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bef74931fda01cd869ee3b213e2261a3270803a93059d9a40e720031bc671e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USK440700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3964b94c09dee13e95331ada344ba192abb91e3807a425ea5b81963bd3ccfb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USK440700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc63837bd7b8796b1abeb915f119f8f8489e2ae70cf399a20f377c39ba31b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USK440700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae747920f45280335e2433bd0b63c8f5697ca16f9e3e1becd9aa16fda00ec3c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USK440700011.