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 0xef9bc1e7472186efdc203b027ac4ffe6898583f2bf2f9f4211bd690c9d3431bd. 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/25ccfe96-ecf4-450e-9664-5e25f19572c6.json and https://artists.proofprofile.net/proofs/artist/25ccfe96-ecf4-450e-9664-5e25f19572c6.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 0xee5b8d66045e08ec7b52407a1a21ed3b02ac51f64d7a2868b5be3e7afac70f1a. 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/DELJ82093439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7ef73238603086da343ad4d3f3db13040e15183e81c318e2ebce7ab267e562. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:31Z), 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/DELJ82093441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eb71568de1a5216f42b11e16cb3809d955a50e20d36d32c3eee9b5838a8e20. 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/DELJ82093442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d9e492274ad2c9c5a2cf81d2f35447ca8a9edcf62fb1b5fa2d895c21d78bb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:42Z), 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/DELJ82093444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cc63b6680fe0f13a923ea462241bf6f5b9d0da123ccecab95a9a52c731aaf9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DELJ82093445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa002df93355491d98a9233024901cfc65734f287ecb88e50b90c1a3d0ebf6aa5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DELJ82093446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfe46722d3f8f4a443cafe57d97123cce2496d872cdf4a4cf6ccf203668db85. 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/DELJ82093447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08174335029fb8d8e10e1f7a6786f70fc7b565e6884cbb39a69b68a318d93fc3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DELJ82093448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8d6e0bc413e95fbf3f38089873b6afd1ad427bd41f61ce02d90ddeed10ffc2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DELJ82093449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d41c766f6d4aae69e48665159b50b4f5b30751e3003b2025c5883cf18d12c2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZC62166397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a7e6dad74c8f071c76a65a190ca775fb31118c71b2b1e2ef3fa1de95df910d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62166398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7604a0a5012b717f665983b9724c14d8df0cfa291f0ed34d1596e1ab3c2c1f. 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/DEZC62166399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd818beb69e3e4a66bdd481aa4fa582084481865831a66f13a4bb526251c43e13. 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/DEZC62166400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaeafe57dbf4ddb9c330c4e8ca448da43569134f9c365bdb773bec157325182. 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/DEZC62166401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b24a6d7947a8bfb01501df9bce82eb049e3b0596a5c2636212fe3e7013c5df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZC62034791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aae1e34e8e54d618db00bb54b5236415e83c793f6abaaec788e2b61123d3a64. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62166402.