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 0x0776e9a2e6652334d8a00805c9598cc5cad7b52756859e677abefb5da91d3a57. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d836129b-ede9-4d62-9ebf-e13c09d5d03a.json and https://artists.proofprofile.net/proofs/artist/d836129b-ede9-4d62-9ebf-e13c09d5d03a.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 0x5adfb447e091fbe7b15d58e02bf393ca060e9aac63fc8c19dd4ad9638f4266ab. 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/USVIC1572203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8573bda24c7994e3d905d132c1c7ae46cdf51e06b2420288af1ba5edbfbcca0a. 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/USVIC1572204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36457b724903f023d71bfed6d4ca2e6e6cfaa43128ea33f1dcb0fad95b60a98c. 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/USVIC1572205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf593ee4dd162d41baa7256676acd330ce694f9dd9295f3770ce5818911e251d. 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/USVIC1572211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddff0910628f08a03ff78f18bc950d7ca5476f71481dfd56744302aaacf40a9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USVIC1367702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288d3f2251273eefaf390befbd2bc0af24e6c3e067ec3e80ff6435a3f3338e2. 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/USVIC1367703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116ef91af3e437248b0f7ad87ccfdf40f9b9c2386ff61da51c74aa41a5da1faf. 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/USVIC1367710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f6597623b9b5c14a76dbbaa46199b54a3c29edba79de8c9572a85b0ae87634. 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/USVIC1367711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1dc48916eb0da6406e4ea6a95a982d44e350ec99876d60eaa01799104d8962. 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/QZTB32369582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed943571f81157783481d6a57563da1058fa2b3cdd6532e77f9ae31b1fc56109. 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/QZTB32328260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c26b30938333d9658c2ee3f094874428a488556a50ddbb86dee356498e085e. 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/QZMEP2344818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548b8fc26db1c2ca6611dd018e0cc05f10375a4da3be8f23adb78217c164034. 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/QZTB32369583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed943571f81157783481d6a57563da1058fa2b3cdd6532e77f9ae31b1fc56109. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZTB32328260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51353269e299899f40208e3022073b5e8fb91c362d53615e1b5909f33913abce. 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/QZES82239634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67368f26254bde3cb05013e114b7c503c7f1ee477ee88d3a96cc7c68b4cf0665. 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/QZFZ32255783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8a2b1b0e075d065f269f2f758c9695bf0c1411682233773569d7e7b0cd49e. 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/TCADI1765795.