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 0x3091d17b78c2d1ad0b019a1bf4bb882885d6ec3e0fdb597c60b710a84c2f3920. 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/ec7732ad-b786-4fb2-91ba-a6ef7405f07d.json and https://artists.proofprofile.net/proofs/artist/ec7732ad-b786-4fb2-91ba-a6ef7405f07d.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 0xb0853adc02b3d458c513c5e68ce3c2ae175ef43da7184f183e390ce570ed74b2. 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/QZNJW2312459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11ab1add02294addab7653d13794186c4d1cceb66e26757b93551f2e6a348ea. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJV2200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bf17172bbd81d278fdcd3b8f73170fda63246afddaddbfb615338ba92ed5e1. 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/QZTVM2163679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e22dd6b80246162aac8afb12d615813abed388fe7619b5407e3f6c144b248a. 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/QZTVM2163680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72164e23a72c6bd2597081b3e3042a0538feb7f9c655af9759bf44c18248f9. 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/QZHN62003007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91780a1b1ced79ca0a425d77241e400e9f53cfe1796e66fcbc43d4f69edd6573. 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/QZK6P1932535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f6ec78ed9c7f159ed83c762abf5c47eb447ac5a75499666b0495b6cf662f5. 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/UST8K1876505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf1739adc988c76493ffaefd4ef2b661566e113b972f8d7acd58e25158408a5. 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/UST8K1876100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8162d5990109a3f361e6afbb5c0fc3a25bc52d8b6a4306ab49417a4c1f86b962. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9L2310279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3624009f595a7f4d80a0eb67f550d7f3beb69849783b46a31bd7dbc3516e1c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZW9L2310280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698061d45998440f3d1e2cd20f4b1177d27a35968933187fdb620626c3c2c94c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZW9L2310281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ee70ed2f0225a5934ce936b0082fdd13626b1e515c0f9160bd70ebad38bb2. 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/QZW9L2310283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e90ab54f86118432ff663f9d0234c6c04f6970479540412461164cb3cc34d8a. 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/QZW9L2310284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f3598e699d40210cb97ff85a2746bfd3db8b397cb4a641af31d1402d3eaea1. 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/QZW9L2310285.