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 0xd943f9ce7685bee6ef5fa5e1bc80bb0cd5d57d515d43cf55f096909c04c7ad2e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f839d985-6760-4889-84c3-f5dcdb5ef311.json and https://artists.proofprofile.net/proofs/artist/f839d985-6760-4889-84c3-f5dcdb5ef311.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 0xd5a0c979cb26efab43fadac83ee2c7aa30f1f8a46194df9638d443607adfd8fd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ52275546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eed976377bd8cf0ed229714ba2ddae07f60571abd9d86cdc235bb4cf632625. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM21999108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609e09ee9753b993a340f21ede6904d5491140f9a004b460761c825f820ef121. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/SE5BU2031317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a8d286a8c1c73e023025590a28d779a9292f2ac918ceee0ef2826b79ba2c90. 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/SE5BU2031318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9eddec11ea276a1ffcb9f94b1b529d6f05cb375e4b7ac0812511edd8e619ee. 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/SE5BU2031319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8876ba2ae4c8d11173c7b5032386d2ef34b3884f384cfd2211ab3ec64c74d5b8. 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/QZHZ62250005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6885728610a018e1253d2b1538e6461b527324c2e6ae00ca046062f7d2061ffe. 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/QZHZ62250006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc13f9128c331734fc1078cd225ffd35862dc9b07849b48c3175384eff14a4fa. 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/QZHZ62250007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1b1598fe7bcb74a6974bcff1e31e5f65551bf21e61ffdf6d0abf5fa7b270b. 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/QZHZ62243536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad71393a81d738180356c10bd33c96ba56413a4874a1cfe5178f0641346319b6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:25:59Z), 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/QZGLM2243069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5164251896cfca1919ea4c4886e012f71170f019a94f8ac0baf4178907d35bd7. 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/QZHZ62250008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b76e2858a08b353620fe0a8cb479de3fcbac316d84f37c94cc6ae601ad4049c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:29:00Z), 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/QZHZ62250009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0306612594acd845de83a75e24d18f7effab131da54d0c2a67179f2b92a528. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNJX2031428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd8235cffd4cc5d78930fe849eae306d397ffa5a307af2c4bb4893a3d4e51bf. 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/QZNJX2031429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49530261a5adaea3f6c3b397731c5fa0f4bdec0c7a52a791ce7fd49cfa81795e. 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/QZNJX2031431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59229b0b349cf028493399ad42d556495336846b7be07d518f0e1668729d8ac2. 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/QZNJX2031432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1b1598fe7bcb74a6974bcff1e31e5f65551bf21e61ffdf6d0abf5fa7b270b. 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/QZHZ62243536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad71393a81d738180356c10bd33c96ba56413a4874a1cfe5178f0641346319b6. 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/QZGLM2243069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fde40bfc716bdf7cbdd2f6c528d03d8eeafc1709fbd580b56d090e5d1879c89. 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/QZTVM2130001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f95b74553ebc53dc436853d38fe182cd7eb43cdccb88b9befb94f74541d61e6. 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/USDY41989096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7bdd700efaf52ce67b9e4aa2d368a0ad91f0bc97b324256dd99b3c2a9d3e1. 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/PEBQ91924307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc529f493351e48838bd244b76bb7b873c0a9bf408a9b15610bfea61cdda8ba6. 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/PEBQ91924316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dcf237115366634cff860ce6962d9da3b8d01e928083fa964dd55c3bbb1a0c. 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/PEBQ91924328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084cea20100956e7a79b6cba6cf1fb0f82fb11feff159dd7b9f17b31a14a91c9. 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/PEBQ91924343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e723a61d98acf32b7d0bbf79afd69029cb0881d02a4eb8bdf854ec2903b28d. 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/PEBQ91924374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013774c9fe348e1a81ce5abf866abb6b1f7b112c3042d53de96e14062926b62e. 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/PEBQ91924386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e30d67eccb5be905e4006fe884488a693d5ad4af08da85c2d14888e0949b1. 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/QZZ8A2429864.