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 0xc9b61543045bd40321b649cebb17aa526b1268c0f278af31cd38d7bf28f9e062. 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/5c8e193d-48da-43b7-bbea-5fefb7fd45f9.json and https://artists.proofprofile.net/proofs/artist/5c8e193d-48da-43b7-bbea-5fefb7fd45f9.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 0xa67ba04c3270f4c659f618880cf3d39b359a45ef68919ad453bb4b0cd90a1501. 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/QZES52484316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fcb3e6ca3134900d8448c894a67e913de236a8cf4d7806f9ee5e79d0d68316. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHN82444462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec7a91f588e030e0d81e2ff93bc4cfcf4d07fb935af9322a813535e535b398c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:42Z), 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/QZK6F2454496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57dc09113e53fcb27ce581270c46409e71e7c53cd6a3c0100dcca68e2794764. 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/QZZ762444472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd4bb48ed7cbe199dafb3d974128bf4218f47b655589b41a7ad3563d232a75. 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/QZZ7M2470557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa51466a3d6a77bd288092d0f152346c6445a41982c5a81813f9ba95680adc9d. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QZFZ72580466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f489826a14b991320b002dd91858aafae2d2ccf43e130c6b6f2c681029bdba4. 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/QZES82556788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e0e78093d916e3882df57cca1dc6e757f7851e6958b52f28174664c5a45a44. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QM6P42527502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29b1ebca269394428379233948671c25c136874e842ff1516e7d0b55c4c7792. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6P42527503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10670949e190faf1f6e2a187bd88d2736e4b2eab235530a622f6b1570ee3ef8e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:01Z), 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/QM6P42527507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf805db662087912b9a9547b642260faefcc6a1b4efc726308d094dd9671c638d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:37Z), 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/QM6P42527504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2323f7f131316b9c0cbaab51e39322b608f0721f00efb287b21639a04f3a67c3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM6P42527509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244f3fcafbaf1ebf04c447259bb7c32aa30abbe49b64d0e3ff42e293367beae. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QM6P42531586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb24a560f354b1e6a254b6b807ceb3f8564e0c88370d1495b8e548d8bde73ca3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2578036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d649c23e6ed18c939cc52608aadb7f74d098c4b15bf7bdf30e36c72dd54d5e. 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/QZWFX2532357.