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 0xa4033c20c623d317261dd3ea4fb8a259b3abfd5e1e5d0c9d09cb0fa8a941cba5. 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/7908f313-3c88-49f4-ae82-2e2b7a7217a1.json and https://artists.proofprofile.net/proofs/artist/7908f313-3c88-49f4-ae82-2e2b7a7217a1.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 0xe340500dcdac92abd31d5d9f96c954feeb6e5cc681d8417c551783c3a1665959. 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/USA2B2202735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f4956ee33da4e67571316568cab1b9dff5bb51afb14d0f89cf08c50cec21f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:22:58Z), 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/USA2B2203501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7528a90141457eb55cd5f488dfe2dcfeeeee43f7de0ba381567362f47db2d64c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USA2B2400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7da8a443ee2fa2a0400c4bd59207b78a3afb8ee28ea9e995681fecde3e24e8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZS7J2424766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ee4a60ba5a4c317cfa8eb282c35c9343eeb02b933234381ecbdea1c3ca507. 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/QM24S2406798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6cc0770e33b92074b26791ccedb3d309b0376aa612ef61b9904fd8fd4fa7f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZSYP2479599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6cc0770e33b92074b26791ccedb3d309b0376aa612ef61b9904fd8fd4fa7f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:27Z), 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/QZSYP2479599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fb1e287334b5bab67ecea4b15c5dfa2f997c3c40e4b20e7ac364abd35d2164. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USA2B2317938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7528a90141457eb55cd5f488dfe2dcfeeeee43f7de0ba381567362f47db2d64c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USA2B2400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da3f876d821a52130bf9fbc8f24debc20351df3aebd58cf291261a2d6eac5ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2B2403264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f656108ca7cd26be8efacfe6e4eb874bcb86cf6f00fc510f459f19c0b083720. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZSYP2420612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41e737231a4508bf8f7ef87741ed4b1528a4a70c903c27ca008630554da3a96. 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/USA2B2401934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b38223e2c4eaee81ae799a42f6fa71ca3bfbbd967607675a994b649e8e79ba4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:31:08Z), 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/QZSYP2401149.