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 0x726ef6f091bbcfc882b4f68d62cc204711f08e94dbcc83ac33382c1c89ab97db. Chain 2 (Bitcoin): anchored in block 953795 (2026-06-15T13:44:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0719399-0bfe-4fb3-b112-4ed1410cf02f.json and https://artists.proofprofile.net/proofs/artist/e0719399-0bfe-4fb3-b112-4ed1410cf02f.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 0x69ef8c1f6c6398e1333f6daadd3b8f2a272378607a53f25a0922b1b6bac04de4. 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/QZK6N2462907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d8e49a5ba779b0ebd21870a02886c32b4a0980d2e29c500c7f6306dd0e238. 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/QZHN32459614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc30ac1cacf5ac30302b25fb3a7f49f41663e3e184aeb6fb4a78b737fd6dfba. 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/QZES72407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25acf799e81d219f0821e53e0b3948053d04472027317a3fcc2ab56d4359404b. 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/QZDA42419569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc447297cc96004748bc342c522b5af5625490f655cb0eba27eefe0c96ef201d3. 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/QZFZ22436841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e350e0112d6fc995405e6c6f1bc6db7dd78f802e0c618f912e25b891a13b45. 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/QZTB82383986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fffed9429a6936e089410b9f1ae631dd9e0749b9315727678b2f6c95dfe4e5. 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/QZNWW2396431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ab80f3d9c7a5748ff119fb1099fe88aa0e70f2004fa4608d1ca1cd0895423b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEP2393595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe818b236e38d94d7d1371c1cca357a7043a582bf902c57c3a8acc82b442527bd. 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/QZHN92342208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7002efee951da27a3af51a617ffc6d7e904e2d68a776eb92d3f9613d7d286e98. 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/QZHN72303925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ad0f3f61bc22e997d52a423c0d5adb2dd0bd2e58adf10f4f2cc991a1dfd1c. 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/QZES82344376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f9e2292f14b25e9dee6101907ed87ef81480c6d3827e57d46d50f4be8686bb. 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/QZTB52538950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7e5c97f1eaceeddb8f472e83ded4573c9c0fd3f1a6c6b3daf204974a4992cd. 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/QZK6L2522830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4681ea71646723d8e8016e5876116fbb087ea3e196341d4b0a4afae7a7934f. 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/QZZ762421370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa32008eb328063cf9f4deba48e48b2f9421616310761fab62c3ff2f2790a58. 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/QZWFJ2421267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97ce91aab9348cf157c05aad69242d6ab5be6909474ced3d6f03905e23ad63a. 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/QZNWY2484381.