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 0x84e6da6553103faa6e736d68177427633416a4eeac4d329fb1aa65fc6a3a2bd7. 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/fe391c73-e676-4313-9a6a-5ae1016ae9f9.json and https://artists.proofprofile.net/proofs/artist/fe391c73-e676-4313-9a6a-5ae1016ae9f9.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 0xab77e1931e023c13ade4c0a628b7cb9f26acffe3575d0302929de8c974845172. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWV2217344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f55564de0674aa94a84b64dbb688d86a5cf8ff59bc6e26de1d419279c74b0fc. 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/QZNWV2217345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7ae9a0cd8c89ea715b17c0b9024ef96bb26e8e683f29cb3634d82c6493b35. 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/QZNWV2217346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74b3560ce43eb2d4f5fcf0e6974424dc68d8b904093b93a7fc4874541de0c04. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWV2217347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5dcaca4c49a8699dac571773517039338098760dd3e405d07fc6e311affdb1. 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/QZNWV2217348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68a61696ef3031031fe4ed6bbb8e3f9a94f3e4b1757cb2d5399195e3e23c371. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNWV2217349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeecbd3ba83f606183489086b8eb0f0a5d56d8b90a7e33c59c4a14a9377698ec. 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/CZUM72301564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d9049aa373227d53ba19a44f5ae02000a8ce39a05c04dae2c6eabdac7149ba. 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/CZUM72301565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9610c123ebe315588aa96ff549088a94667c5802a82c715d081e9bf9bed14602. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZUM72301566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45fc7e9868933c49a42a6a04703a8027ba10b2a956758ebc2540bafbc6280e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZUM72301567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d020051022420910f3b719931b1b7b7158590b5931aa1913066be70a5d62c52. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CZUM72301568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8fe2c991e2eff643d1622b750fe3fcf5e12f3c1fbc287b83c6e7b56914965. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CZUM72301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559da960a33d78728f59f79140063b023a08cca0862e3432e4fdd20f03a38ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZUM72301518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb734d69b9b1a3adffd0936238a65a554ad6284dd96e6f6ac76d42dd528d9f617. 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/CZUM72301520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95eeadfd649f0b2caf47b08431888f07b2c857609e2af638db3b9563636553. 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/CZUM72301572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8a0282f7754e9827a18f30a2f4684fa3777e799a3d99a1b6827daa2fb61f5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CZUM72301573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6cee153c188abb5fb6a03dec2e8590c2d5124fc8af8990c4c1611cfc0c1cd8. 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/CZUM72301523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a968f1701a5b62e52bad9f461e3cb7f4f40c35f36f91ca2af532f962aaadb0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZUM72301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb16ed708e1c9f2fb825a1645cfa1275b2ee2bd7ed6dfc3d04ede450ea4c3be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZUM72301521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8a0282f7754e9827a18f30a2f4684fa3777e799a3d99a1b6827daa2fb61f5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CZUM72301573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1c7cdb1f7d760127e2c67a23abb7b859d858ce17a8c8acbee0fc0966422fe0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZUM72400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262a3c7adfd79d73b7f8b6ba07fa7673a007f83cd8a473c3796d4d1b74bec4d5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CZUM72400595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9fc24d243a7ddc7675d90728a80cf7459e0d2a3a94b3d9f0d9174bd4e7cc0d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZUM72400868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f08e2fe3a668b5f5e2e506c840d173ffd23e07ee37ea0d1efa306a753bf125. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWDW2588740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39963e7680a5528498f008d048654e9996fa86c92b50f2637fbbeb4d3dfa546. 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/QZYFZ2428466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b1e13e28e727db5daefdc3627873e40173d6572893cec448d5506d08380c10. 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/QZTB22373526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ed914307425504b913e4dd986bdaafea2fefea02f71c764c4318c6c41d406. 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/QZHNA2360279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf3c500296d37a45f9030f2038d7789ffe23eb92a998a12429fb80684602b73. 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/DGA0T2408603.