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 0x46a26b517c7515f152582a2aa5964cf6b060b9dd773ca51f62a5fe47a8133ffd. 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/de733f1e-8863-49e1-a9e8-7303340f2f5a.json and https://artists.proofprofile.net/proofs/artist/de733f1e-8863-49e1-a9e8-7303340f2f5a.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 0x2ae3739a4e270e5fe555effd306d62b5d552d86abac36cda49942941a2cb6b5c. 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/HKC371045216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6738bfc1d4eb8d8390719c1dac77d02b7e84c86d92d02b27591a0d06f8392. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:59:36Z), 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/HKC372501098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807297bf3e2890981a576ed51e216c6d6f8816f7c186e0c614a2330ea21a38df. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:46:53Z), 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/HKC372501099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621761a942873b897545ec87793982e2b5e0837932fc5014ba67c73bd87065bd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKC372501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221600502ac626adffc25a83286b61650ec21d6fa45ce0b0000cc3dd6af710af. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:53:35Z), 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/HKC372501104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b209aca44edabfe93b6792d28d2a6efbb30cc1c7c6023f81ecbb2c47913d767. 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/HKC372501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0794596729acc4abd444778db56e5f418eb22bc5e81ea881a943f41ba041a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKC372501945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a962dec2fea867beaa064c678e959d815f4d215268971cc48ce857a63be9c44. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/HKC372501947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8f992323bee4bd273515a4460dfdab0ba0d640058c83da59fe56b756f0450c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:32:46Z), 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/HKC372501948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1a7877182a5d2314c15f710d71b339b7ce2118c25fa1ac5979eac44e5177de. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/HKC372501950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a26664398cb78078ee4b72ebb2ba201c337f61d14f7c7adfdf2cf39a1e9da4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:52:26Z), 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/HKC372502901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19947c39a2d907f29037de11fe9de5cb7adcd0ce7d776e2118343e9bac281e21. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:08Z), 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/HKC372502904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f3a0d42a98d149b52ac1e81acd990cc469e69e7d75125b5197c0ed613402b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:21:59Z), 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/HKC372502906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ee19896826f70d9683ee0fecf558b1b5cadf28f8343d6a3e03422262f01ca. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKC371042048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6efa966a83ac0332b06d3e5d83e04a63ff1d86729009ab578c20f23c3fd530. 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/HKC371042593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb2fc75c505587e998c502dcf23a2e65f8f08e836984893a64b8f3e61f1634a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/HKC371042594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4724ffb32585e65cbd8e91823f979cd6378c4daf9b3a8720142bf4917dc28359. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HKC371042598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41aff5d47c7fb9498a0ead610e559c8485101fa40e95791719d11d09ecf488c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:39:40Z), 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/HKC371042599.