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 0x6f04bc83c940120165068877f3e32d37fd741c215999898ea81d72cd29f7a86e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed6fa153-af79-47b7-b9c4-f787e59f1251.json and https://artists.proofprofile.net/proofs/artist/ed6fa153-af79-47b7-b9c4-f787e59f1251.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 0x9657587ea8ba14b05bcc913f007e7a9f0991293df2be83a975926fe38d00e642. 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/DKB3C2308601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1c5b0ccdb684fc11efc76ebf14bcb18d565deed268b6a28e8e3af6c193c0c. 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/DKB3C2308602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34391cba418d5d845cb0453dd5ace163c5c5f54474effda2bd7abc7208844eba. 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/DKB3C2308606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1667c5b32c89eabe140930fbc1a52cd79fc352dd8600565f536e29cc4facc56. 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/DKB3C2308609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d52e205d9954eca170edb4e68842b76768e7068d74ddecd47a45f61ac36bd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKB3C2308610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202fd8c5fd681eb272fb9747210043488dd1f4fb68c8983d165efba82a041243. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DKB3C2307102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dfc18dd2a9e726375d95671868cb0433e245b4892aaac9c126f76d0261e4de. 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/DKB3C2307103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378cd1558d947f51cca59f4242908c060d4c9406a067001e00953dab13e96c5. 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/DKB3C2307105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd44b71189b2b699cc58bc139195134005d5a5ffcf1fe726c33280e100ad96e0. 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/DKB3C2307107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c3e17e786d559787326a0ca7b05430d0f4fe8064ac13400801ed659abe843a. 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/DKB3C2307109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e2b2e613275df854ea3472d5a5b11f1bea252060118dbebd43f1e0cf08597. 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/DKB3C2307110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7155d35b0b7e54689c9beab99d3404acffe04eec3187438891aec938df16c4. 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/DKB3C2302401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8837a0cc7737ba8ae48aa456c6ffbce430932c1a908adafc4e5cbfca11086be4. 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/DKB3C2302406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f74fb3a271d5142588455ddbf52351f54086f4a6f88d45064f84e2269c46839. 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/DKB3C2302501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebdccb389518a8cc945953ffac1b40616a470ef56271bfe171bda9b1976cb02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKB3C2302506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2b447f48df12f3761277de6ac65d3c28e10d1444e4636f834841ff884028b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKB3C2302508.