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 0xe7e1d528bdbf10c0f6e9bd19d42433de24c23c2bbecd09b81a4a8b79bdffb2b9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc86247d-2049-4f92-8fb0-9e3c5a9d555e.json and https://artists.proofprofile.net/proofs/artist/bc86247d-2049-4f92-8fb0-9e3c5a9d555e.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 0xc323dc3601292b32756c3a95960146ac788483a3318788fb31f5f84e94bacbb2. 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/DEP551971724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa259126a8ef7c15d7ae9bf42aefd5c1ba6808e923ee15166a584c42bf44911. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEP552005705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab14a2d8f192e1a7dddea5ffd2daba04d755f1e7302cfe4b29f61d57076ee8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEP552005810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5946091011dda51c47f14c0ccde3ed5a39e94bb041cfb214eab88290923024. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEP552005787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6ec9ce7dc0ee67b29d5d1b59fb065f3c64f6cff8272bc0ef243debc12d2cff. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEP552005884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5946091011dda51c47f14c0ccde3ed5a39e94bb041cfb214eab88290923024. 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/DEP552005787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a6053ac187ba92747341b924a080efb14f1c46d5d6f9c3c1c800d45f489336. 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/DEP552005707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563c5161168693237a82f7221a9da3c9d8619faac73d5b60ed42846facbe9062. 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/DEP552005684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c359c8389ccc59d1e2d3ae707705ab299a11117223832a5f3ba513ec24c32c9. 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/DEP552005839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252cf05923b503a00a49005b55d92421cddfb5799210e877f669b6ea86d8de15. 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/DEP552005911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c93d12c01e00e1aec61e93af5b693f48ee08df14a17a8016ee739ab77f50d2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEP552006001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e548f1c8c8f9b48acba90ef267b877beaef0d2d4f6169f4cea3bb6f57238114. 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/DEP552005913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2217a3d66e9c584abe433630ade5730fae58e5c5f57c80cf6dff8125c58b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEP552005830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128d3184697ab038e10df491354af53536fa24ce26f3739c40f2844ee2fc6bdd. 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/DEP552005909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578a7ef011d7398ed3c28b04db336b7c460b48f24072dfba54a49813d518e67b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEP552006031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2ef06ca411f0c3bb8f36e3ceaf2125f05ee9b88069b0198243e99e5200ef2c. 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/DEP552006129.