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 0x5da2aab54fd4df1111b1f7596de94a2847710ffa91b0e0e7f8a1367d65be28ca. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc697899-552d-4331-a4f4-c2d46aa193b9.json and https://artists.proofprofile.net/proofs/artist/cc697899-552d-4331-a4f4-c2d46aa193b9.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 0xf1a8fdfe19147b637b611b26e7eb1f6ef76bde0fda7597fe1094262ceabc9aa1. 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/US83Z1825568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319d3abcda4b9a45c9cc9918680abd5b0b13acc86f605855f644ab9a35884298. 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/US83Z1825570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cfae9eec3da3319a80f9d63395a7230dabab55e818770084f4d2802c0cc918. 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/US83Z1825569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9bd4bac3decbca60cede4edcc9a23b6e4879f2d1ba9df4ef44d9ab9ed8377. 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/US83Z1825571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54da596be8aebb44bd05d22fb529a1c610895b4a7458328215df5adbff2098bf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US83Z1917869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560bcc83da88280ca09987e1b8ec850cbed9ec4fc2b0658ed1f5512515022cd5. 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/US83Z1917891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0255c542876d7d99e024e6fd769d5e48b4f59fc7afb50f8cdc31923868e3c6. 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/US83Z1917893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f117840c94e8267e471c4dcb7a3bb843073e932c41adc0d35d55bd66c8c0ce. 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/US83Z1917878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3fbf079f6ccd404045819d5444e6a558659723c9103d940ce33038942d5d2e. 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/US83Z2019454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276e47f6e3d8bad73f588f06c57fc2d864eff358049cddbc0f8f0f859889acd. 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/US83Z2019455.
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 0x84df78f2478e9e45577d4e026ffd2f374169c05dbf575d65b978ed2aa8c53ff8. 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/US83Z1904089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea40212b097d3461728b8ccd3a62795af04c6da1b6119b481a21a704126b147c. 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/US83Z1904084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b6371261117c4f1e53a10a7e5fa833e254405d8187c53a38797476505da6d7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US83Z1904079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb754526b78ab5417fc4b3668706ebd6033e540947371c2597cedc75ab025f2de. 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/US83Z1796985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6cc3eb52d2ff3336e4b0649b9eaae358a24db849db53e06c02d3f5d896075d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US83Z1796997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67f673acd757aa69491a6628cceab6889eb0a23045a1c3f9434f8f41e4a61ff. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US83Z1796993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f6ff57e6340ab84607d2a5bfca1a83e1ee6b9e413a2d0383c7ad613370f217. 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/US83Z1796994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b44d8f9b84b7588fb07824d45725ed11818706c4a255083571fedc3d76804fc. 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/US83Z1797000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ec1b2ca1bd2748737b7f402f8e76e845a01df9be595fded9247991402fd0e. 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/US83Z1796992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297d95c18f486d9bef7647fbae7520524aa89d875fbe1b91b03eb3073103bbbd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z1796990.
Planisphere of Dendera | Southern Hemisphere | VA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a155bb6321e209b97fb7d0aad5418cbe11a0607c7c900c5c9a4055bd9aae2c1. 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/US83Z1908351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aff771a9f83f163399849523e559ba74a002a368f1b21559ae278e35dd997e. 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/US83Z1905602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e224e08a97ac97150e9ec87c8bccc35ccd4887ca8ba2d48c687cb3922930b6. 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/US83Z1905593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618caa4c05782b27e74d16d4209dc29f6dc29b41e71d802836245b926a638d15. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US83Z1905604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db500ed6e88961564c57388b270d966ed3cb4b78fdd1646f260d304579ca62a. 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/US83Z1905606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b1f6c759bca8e948a180c4b59522bb39ceb458c6842bdd305ccf0d395f15d. 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/US83Z1905598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9e7eca6a4e846c5ae2f11a9ffc81d9123af5242cb36d09e94a31dc9c44f4ab. 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/US83Z1905590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe37a1a59a71c1acad5f277120fbca38f42c3a35e0c12350a70c1f0985eed21. 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/US83Z1905601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd3ff5220a207ba8f318517073c2cdc0da4f1912f8233c013b74fa20669101. 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/US83Z1905585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eddc7a1d75edc5a3aa1cbcef3909f45183dabbb88aff1f3a7c5521e627ba60. 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/US83Z1905595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb3d5c10f00fc57c08301f853de53798f1f6b6dca8836c662e97f968664cb5. 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/US83Z1905584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82109d8d24967e2fe74289b5e025544b61b3d5108c75894e21b31c1ee18ab62c. 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/US83Z1905603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283928f885eb5c0b6011dd24f32597a7824cf8c2bc6269b9f6969f1a2a8b7561. 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/US83Z1905589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec4d914ebd0ea80172db2eba9c5fae96667386f87f0a30d5b973fb38d960b04. 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/US83Z1906879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a542d5982e2e8e4471140fb0c4ae58ba0b9f7cd163ac189dd4b7c3dd9814ad8. 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/US83Z1906881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba329b1ff53b9b3fef5aa4ccedbe92d06a472977d84b530bf06cacd92d6b625. 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/US83Z1906883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e27ead91ef8ed3ca9f112dd2eb675fd7ea12c4e228c4c32c5fbff29fd213493. 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/US83Z1906885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d15cb6384941e5ded8d0a08b0f6d1bfb9160c0aa33e2d17ded67327597405d. 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/US83Z1906894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e57a10ae10db7e4cc135f1afc6b0571bacc92aa5e93e6234dda4955aff1a170. 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/US83Z1906895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f61004a4198c3a5e23e61f71e50489163dd416897e531bb166c53135435be. 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/US83Z1906896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e873822002082256174d8bb1956afda90c6de49b4cb39f0543fbf657a3a79. 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/US83Z1906901.