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 0xfe29a4c100244ef6f84bcf48dd4d86f91591a5f25c6868abc48d540fc44b5c90. 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/4b708ce4-1ad3-401d-8fa3-644bde47d950.json and https://artists.proofprofile.net/proofs/artist/4b708ce4-1ad3-401d-8fa3-644bde47d950.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 0x454d7c5cab497f31845185c7d76fd49a236b3607e93a5991d9651d74ac53420e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE3OH1631873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e590b1d6a6a19f777ae5ddb300f771b740ce5c702f4d26fa933b4a9b6a814c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE3OH1631879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb9075a46534a3c9a09f05a6c6e6377de4110bf6b92b7679dbe72eb2997fbc. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/SE3OH1631874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b633d2541648fa9fe692e6ac3f180305ae806833c4ee8ab121236f8ff346ab8. 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/SE3OH1631871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6278e7613d36a6ed6a8d0197e922f5aab40bba01707f4b76a783eebc5afaf1d5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:42Z), 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/SE3OH1631878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc618c993806a62e5d507651b41196ffff59b86a40aa77671de44e1e4fed26e1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLS6R1886329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62dbe3a7a99b72d4466c9531b54d146465edf1249de4afecbaa38b0bef052d3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CH7812040360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3657bd3b0bda3d7a2f7b94d814e5c32dfad16fe8a1c8de65937389a933c61f1c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CH7812045174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3910d795f88461d045704cfc607441c5023d53e0b520242d8a19805f87c05e8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES03A1000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eb0da76b2cf3d27529d237e932b500317840c497591e86fde339e9db208109. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:57Z), 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/ES03A2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd376fef4980db0373205bc7af9c426b882569ab62940923581edafd36037471. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:43:46Z), 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/CH7812236752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d52795fbccfec332aabd757080395be43775d56edb586d619362af7c9ef3e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812418497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0496fd3fdeadfa1af29d4bd9561c52f456b892192882ab365a8bd6b19a7160b5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH7812418498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b51d07ce78d57d356edb7d71d1d7897c85ddf952ee30fa02da7fd0cd76c422. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812418499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03483aad2222dc63eeb080872fc9a9e6395398e98206ab4252f3f36f14b4c427. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CH7812418500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf19645414bb2d0e04f1741777192939244c17cf2a7fc13ea20cb7768e49e37. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CH7812418501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825b8d2a7dd1fda34fad49a40ac28d249b21bd61c3dcea0d9cf6fbedbf7038f6. 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/DEBL61318588.