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 0x7d732b629c1195cf7c45ed17af28b7721b012822f8e3a8e34cddda385ffa4242. 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/bb07cb88-ea84-4347-90c2-a74997a08d5a.json and https://artists.proofprofile.net/proofs/artist/bb07cb88-ea84-4347-90c2-a74997a08d5a.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 0xd30cb2e781ed1613f3eb6a8ca6e0084d305377641b3ea85904ee8c886f51cba9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAIC2474567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b7edff31943aab9524d7313534862ebb9cfabee44d19ab3775fd4f178cbabb. 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/QZTBF2424801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881ced11a0cad8749c049d551b108826bb44baa5bfea5aa677634e56a3dc602c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EX2467342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1dd9f47c7c643101dfd7e5294762a0bcc2f4c228492f7c924caaa261c837fc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2598197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac91af4098721b3592dce61a8cc4425b14e46eb898b3c846cf04ca1a912b8a38. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:41:28Z), 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/QZHN42584245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946696090e79a6af61048cab214e9554097037a7cbe477ea3c53bacc7ebb20c4. 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/QZHNC2590936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3495f9e4aa4e33f78f380183887addf98dd8d66d6c5bc19c5263c312b0528ce7. 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/QZK6N2544014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4858274c28c0e28ba0cb24b2500201c02f230d25a06b951be361366f9e58beb8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6F2504903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791b793458c3a3a47ed0408ff64cc5cbc40b948b3371adf739aa796216af9132. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNWX2515255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794f43909a6a8f8bf291569fb679570fd99e55fcda1780184eedb81b25032b5f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAY2516092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9a2ab5239ecbb87ca3cbac92174beb7b58c5887c1a14f46a04233cf58ee3b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:36:59Z), 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/QZWFQ2594201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27871966851073bd7fd804146887b0bd0ad2a306dc1f507281fb559646c80fc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7R2540507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6c4a94991d9706b795d388a36e2b9e705363aadd101992c5882d7c5a6b1440. 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/ATR981280993.