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 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 0xf0829ea17017ac0be917b291e0462fa432de7fda8fcd02db6f57cf1d8cca7347. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98f7e6c8-a5c3-4898-bc89-ca13a02d6614.json and https://artists.proofprofile.net/proofs/artist/98f7e6c8-a5c3-4898-bc89-ca13a02d6614.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 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 0xcb6f79dad6000ce8502adb507351b4567099335033c910af3e39e5385d082764. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CHB242313415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d5ac78f0a502e1c267b889b175992d25f6b60a23bb35f5b4e01aed943e900. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CHB242313416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c37eea32d0f827492e6579ec39ea5f4efbb624e9495f09185f6b55627df5fa7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:35Z), 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/CHB242313417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1edd3d974f1c8c8077b1fc5d718b9305d300c9a82fff7d5f614665c5364e8d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CHB242313418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a31f22f286ee489692295eec2b70d8595d3ea441c773cb5691276ce13a6fc4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CHB242313419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3fd838791e7652ac8a9d5ac7b567ea47509a3b1d112826b48195214a6a4c0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:43Z), 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/CHB242313420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457f9ba660b534001bfce6c0705af1a6a502ea08b6702fdf094169df78e349fd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:34Z), 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/CHB242313424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bb3f93f15dd3004c3d1c9a9e19b50e9d5834ff53803a278625637a814c59c8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CHB242313426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238c30f33457b692293470f93f982b76535e1a2d58706abe67aba25e2d286b37. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CHB242313427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f83df436a5252fae9dff91b214f4ef0b63f1fb146c14f5e521b8798a8b5745. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CHB242313428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b51291e5066ee2eaa1302985e48651f503a7a3514b31765ece6ea9366fb631. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CHB242313430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7653f5756d5c30d8563f28dbc69d6a4a49bf8929c9f97ab102d0952d71a50b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:56Z), 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/CHB242313431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1485986362070215c96c07a724134b90e98df8a7ea0b7c741ad87c2dbb0f7760. 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/CHB242313433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc9363ebbd40ac4af7fbcf44e61c0ee32e2e857876748ee848c06ecebc1bfac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CHB242313434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4657c952b99f8e5d71b4e3e082cc463fb0ab8fba937a013fcbbfcbed041dcb4c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/CHB242313435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0175be2701495e5d1b064c2928c2d2bd07d299c80ede9da77d63f34b801f0ba8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CHB242313437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610dea2a32ae77168f3a3d02ee7da43d0b6fc3504880ea9ec1093f802385da9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CHB242313438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0866558550bcc3f5080307228fe6b757670b9d4fff57608134dc3791d31bbfa8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:50Z), 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/CHB242313439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf430c598b84c834128c2a7f848bb0414bed6d32739b379549a311c16cfaf45e6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:34:25Z), 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/CHB242313440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48726eef8c1729ae3446fde91307f3c06369e2f1baf6cc4b8fb319854f129f3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:13Z), 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/CHB242313441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f08cf50c66ca3d4d7ebf52d2f21e4715f0a6db5ac363c5ff7c78d53f676ac. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CHB242313442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bfb355c4f0cd8e8e375ad20cf1c1f3cfd7e114e64de3a986fcb03ed5ee57b4. 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/CHB242313444.