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 0xfa55798e1aa16e2c0823c376614a3751c946f8fd88e4213b0422cf8260d5dbd6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1ab3c9-8ec9-496f-8c33-c075aa7b1026.json and https://artists.proofprofile.net/proofs/artist/8f1ab3c9-8ec9-496f-8c33-c075aa7b1026.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 0xff8c1e1e799dcaa7a108df2d56d8e12415c0be3b0ce254efdc8e4476e5f08fc0. 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/LVL152003078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8d51898158d96a58b5c959822e1d880178fd3c2020f6fe4431620e8962cc1a. 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/LVL152203074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b82eeb4a9708636b14d95044000d6c86b7f371bf9eb4c4fc6295511dbdf58b8. 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/LVL152300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d20bf1a40dd2fa9cdf6dd4c90a3e8e79193e8b836dbdb213c7bc7ab6b29057b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/LVL152301488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dbc71a67523d624026890cae46e07b462a607228beac35d061812608431436. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/LVL152401181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f6554d5c9a3d33002fa1faf9e397b4a57bfb1b959de409bc397bd1e9c44ce. 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/LVL152500796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1467518d2dd360e886ea8423ce80a7cd7fbb81c2e7f8272568cd2bf77af7ff. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:48:40Z), 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/LVL152501761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b82eeb4a9708636b14d95044000d6c86b7f371bf9eb4c4fc6295511dbdf58b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LVL152300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee7148abb4c3ab5ee856db5d2ee7124afff1196f972aa7f7ede5c560997b56. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/LVL152501763.