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 0x7ddda9144ddecf67e8c8de1b0d95c0cbe50a702b31d20ad184f36c6d90a84ed2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e2aab02-b5c5-489d-89f6-cb3eacc6b850.json and https://artists.proofprofile.net/proofs/artist/4e2aab02-b5c5-489d-89f6-cb3eacc6b850.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 0xfa52d80007df6fe9f5ee850aa49a8dfc6b2169b96fd976fb962b80f0d1bc4b88. 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/DKBR21301601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bec996ffdde8296d7f600827a2e4a0a67a9fc47b91390133c70053f30ed7d62. 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/DKBR21301602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b604ca5563eb300169f866c64b0f41d5d6bf2f641ebf758cf8b1c6bd5377a. 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/DKBR21301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd938a71da7e7edf4b16d8e8cc4fb7ca3d45f7a77fb4954d5eeab942d093e49. 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/DKBR21301605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f488f51d0f9f33752e487d457fb6f1e70b8a5ed8e514f711f4ab4626a482b22. 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/DKBR21301606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ffa8a5d6dc6da5c773c35a5796c52294c95689dd296805bf0f78e97987ceac. 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/DKBR21301607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac4c9137f3ae6760656265fed96d5daceaeb4e0758f7591dc33edd228030f2. 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/DKBR21301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb955e9dbf6d282ef2899e9a1c5f05242377e706040923dda266b0084d0e6e660. 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/DKBR21301609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef371428c7d2ccb58b809f0309340e36ee448f3fccff1ebfd5569a5dae5027e4. 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/DKBR21301614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0b4ea2443228404f794168497bc74861fe8f63bd5a2e48c3adabd447da0b3f. 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/DKBR21301615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cf8e1f72314f84f38fa243a766a17c91aad2bd5cf0e25071bdc97c3a7bc2b4. 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/DKBR21301616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a2909b0458ddb61c0907345a7e1b395182c66362188fef62a633ab0ca9a74. 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/DKBR21301652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aeb251263843384cf27c6da89170197acac4ec058ff1ccf3867fdbfed9a8ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKBR22301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a455ae2a723f9ea523ccfba32517bd27c304a53181276b014241bf2cc10c1df. 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/QM6N22271276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32362c8230ff24d5f054698a4b90d28cd03788a5e153fbdbe54ef9510b2e1f47. 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/DKBR21302501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef371428c7d2ccb58b809f0309340e36ee448f3fccff1ebfd5569a5dae5027e4. 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/DKBR21301614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08581078182daf2e80ee1f6f6373fbb21877b3ffe659cdd59a8203899b3b95. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKBR21101720.