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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688634f1699a62a7211d8ecad7d1c7f3b512d0946ecd4a26c6042fae14df6f7. 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/ca903418-0693-45b0-83a8-a2ce47e43339.json and https://artists.proofprofile.net/proofs/artist/ca903418-0693-45b0-83a8-a2ce47e43339.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259e8af51f427fcbea058cf511d2698d4fd34508d7923bbd59d0f0dc8ea5bf3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEL1993295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbabf0639bf9c52dbc12eae6ad34338249f885262330838a169e6689ffbe098. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DGA052056382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22325dd723ef21279ebc075eaa43a1ec906a90390874b7723c16eb4c5db42c9b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA052056383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cbaf9a69746bb75910688723a704391460241586f594782c458a5a5dabcce3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA052056385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c3d38c2e035c96100c7869cf94601b1e7a73b51ee8f790b4d392d08295928. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA052056386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd546774533f0c639c95a8bcc98f3a0fd201fa48ebcd0082107b334de1c37253. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA052056389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1235be0c6aed187f4493e776c940392c081cb0983b2fc9bf38b869564491514f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA052056390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85ce0d24b6c7661022844323450239fe08227320d8c88bc812103970b1d81b4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA052056393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcbb300ff77aa470a30029b2fa292f3aba94093bfe057b9d8a11149fb4d91bc. 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/DGA052056394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e8abc7ac0d5e7fe20f2240f34bf82a5ee54a77145276c5d76c7d5ba7083a1a. 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/CI2DY2100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08239af9f4d5b9dd28b2993ca595390568e0e5baeeb9e11ee7327cbc9d66fcc. 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/CIUM72200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756bd8dffd39db0284ea60cdb773435886a81bd04ffe8857a7269e956595d511. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZSYP2214919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed2b6af62615c84322c8f896e9e9d628af966ca00d67d774fb6eac7b79d33a2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZQAY2351012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef08f89811bc68660d366d0bac55ceb5d5b9cda575f17114a4fa4406728b546d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR96X2434256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3a308bd2daec30ccf63572d2ed8602001cc4d6eaa97ddee70176c95391dd1b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR10S2536921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0826cd7c96ddca4424baeb34408bc898cdb16dd1dd3da534d84835847c5af4ac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452507772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d855e7b30865010f9331710d1ac3fd426c7f419739850bf7461165574fb5bc3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DGA052540434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd262724c399c152d2e2575ae36070054a6a2db909983eedb211f32c157c879d. 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/FR4EO2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474de629a04d1ad33388b54e236a21e674ad08263094f187a8ccc6f60a432295. 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/FR4EO2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd262724c399c152d2e2575ae36070054a6a2db909983eedb211f32c157c879d. 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/FR4EO2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474de629a04d1ad33388b54e236a21e674ad08263094f187a8ccc6f60a432295. 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/FR4EO2200085.