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 0xf6493cbee8c256557351d51d52b5b3ab7ba80ef401c8808989214414248dc5e2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de3b85d5-0a3d-4d71-8c11-7ce10ee7e5de.json and https://artists.proofprofile.net/proofs/artist/de3b85d5-0a3d-4d71-8c11-7ce10ee7e5de.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 0xf8909e5a8cc09fc8f8010c5a2f24febe593c683c4fa79c764f6c961101960142. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:59:39Z), 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/QZDA41900253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2ba2e7816bf5d67a75d14ce4b9206b03d6ecab901020759399347fc1116482. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZFYW1904300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0077dacbc896e46b18926a79cc9890ab86394cbc0b83110586fc8bf351e8c8. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFYW1904301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c3af37da46fcac30ff8168c9e9921ee2fe614d8557fc170b18ead649bf26f. 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/QZFYW1904302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b96b93e11c162c57326fcfbf9a648b5d0dd0f110f766b1d73b58d211e51b8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFYW1904303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719020d866da21f01a1ace238204eb1618a0c781d2f15c7ad8b88cadc30597c4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZFYW1904305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b906d851f86e7e0960fe425b9a932cf40325535829818d6512ea32b697f18fb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:52:32Z), 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/QZFYW1904306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fe3d88eeb71d62a882ad67f52da260402489eae8294978de23f741b5e3bb2d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFYW1904307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e433183cce37d9a0520cfb857e6e0c0827a40a82ffab3c31c9fcbf38f32946c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:40Z), 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/QZES72187723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3015367f1418e4e57bb9e5f3ca28824c1d3297274b0c08b58918a39e714d7c1. 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/QZES72187725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027fc26353de327c47fa2e4ae5bd8de73291d3527c155455f0d5fb99be827e37. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES72187728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e8a62a3bc057701cd17c85223c361fbaff0a67b035648fb0e37e78d8a2616f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:27Z), 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/QZES72187729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b324483ba6d4b9ffa060ceff7e669f583f2a835d04f768c2f131b38bd25676e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES72187730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76df1ebcf0776c2372d4a585d43016d00c608427299ea6348e57cd54987f91c6. 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/QZES72187733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5153e23a6454c0090f2c1d580442d9590a689f1c1d88137616c07355f326edbf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2228527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7861ad6aad5e4da23d6a95c663e89a541f9d45212f913e6deebd35882252c7c6. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZNWY2386104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784dc55fc73a6e69e6ee10ace5e37bae0c6b09f00995f219ecb06bc39d77d284. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWY2386105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6782fbeadfd85d429865407b68a08ecc991adf9ad069d230a152a3ec433ea6dc. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNWY2386106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8d41b513566d4ebd8f28fca1a05c306e8bafa8a35c85f1c8bb8ab05657e97b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWY2386107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2567e36b04d6eea72d8caecf8801a055a6763725f0a2d9d2bd3443716d6ebd79. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWY2386108.