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 0xfc9ce51e88b4a708d137e94b7f10d47d2fd4fefc76f976b550a7139f28375a7d. 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/de6f91f5-0e70-48b4-9a20-9a64da03d72b.json and https://artists.proofprofile.net/proofs/artist/de6f91f5-0e70-48b4-9a20-9a64da03d72b.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 0x558484aa4788d5ad318655aaa36b1e26833d6a5a0e9a965e6d4997ea5e3b4b46. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZHN52079102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce132ccb16b9eb4d19680103fd2bcfd1153808553db70e1769521c67dfce880. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6G2036640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33c6b33585268ac5fd4e866f465d47bb3bf601befe4a0555e5a44fb4f03e6f0. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/QZK6G2036654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64a3ebf2b12f04bce84e700d7a7ef169039111a0ef5831e2408fa3902b699f. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/QZPLR2003930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce34e92fe118bdbd22f85dd9ef12cc6a9358fd576bcc9143f93287cded94042e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ62166004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6dba18d8fa0184c42afe3e3d07b7bca07640df0e9c3fc3a2964a674c46ae10. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFZ62166005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d35d4021e5805981bc5d62f95c7dda39004d1485766872c3eecb2bfc17fff9. 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/QZFZ62166006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da660998f57abe0ad8e5b7fa7fe7b0ce21da6fd81191eef20d9c1d88184e48c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:20:56Z), 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/QZFZ62166008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d28de9be4a68cd9dbc9f973324c3dfae40b9e830f6a841562a6744d1084e8. 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/QZK6F2477134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1d23be32bde4ef204a8d06f57b6b2e2e572f6dee0a8d7fa8e3af55219d2a5f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6F2477136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8770e652e62d18da809788197b3bd6a6800e0b4c8f1143265855b8b0450e8d42. 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/QZK6F2468953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd049a7d0ba73e186913372d5868d3e9b40277e39c9b58a942d8b1dce0f39407b. 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/QZK6F2468954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa4b36563db48d989b3b93430c811bd6e406a21185a8f0fa35883fe4f4080d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFJ2509667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb77f1326225c411096034534ed176d350c417a249bcfe6de22de99de67af19. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFJ2509670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8da31393859c182d5a13cbec47e93bcb1151ae2f5f0563017489a43d8c975e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:46Z), 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/QZZ7V2543133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cc16b4661567a637b3b507ef71512c408ca58473393e2ae905dfe23805802d. 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/QZZ7V2543134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12959fc4ea4fb756c0c831370244dbfb3beb2bfaa0263bec541dc565718b2c4a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7V2543135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eabdcfa09d33ffff813623ae11ad728ff133635eed170dafd154052dfd6b70. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7V2543136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d86d6bf6beb2eefad4f16010befaf5628ada1f0ee2c50aaeb849c0c56f51fbd. 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/QZZ7V2543137.