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 0x916410b0ad6dbe368f7e0746dce8f16fa1fdd1bfb7f7f35c76fc941b6b72ef1e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/621971c6-3d52-4357-9f42-f79787e53592.json and https://artists.proofprofile.net/proofs/artist/621971c6-3d52-4357-9f42-f79787e53592.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 0xff50cdabee370733eaf972afe727f16a06136957b43c2a8317fcd95ef4d633e5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CH6542021262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6d6388f8e4bb92ced75fbee802013836eae66ceb46946657c2327af1c8fe8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CH6542021260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb01ae314b929641b9c2fcb2255509c0eab38907791689f27d26c440df4cb8a9. 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/CH6542021259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122afe5b95a7c38d0b703ff8a1c98c5c9275fed982c3e5cb4c6fc5e4c7aed628. 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/CH6542021258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b36bc2ea467e8170b6fad2b711fb482eba50cc2ca833ad316fe41c3d9a84103. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH6542021256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1538a365b58427962a7fa938bf559901049c023cc666ec9a0e4bdf854520766. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6542021255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0554c4bd1946747d0662b435c54a3efaf78da1e221d11612f272be0fc2f0ff3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGWX2167210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc550502888be652c8b6434077575b230dc7b1c8228e925c02c30891709058026. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGWX2214616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf492c27132010f606a2a40e0267ce9543c310290cd629a77eccab4b2ff61e7cf. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZPJ32183781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0445108ebc5f01ddf693979a3472bdca0212d9d32d93f0c3740db659db87d7. 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/ITR632201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1152f7eb2724be28d0069f712f2838916db88ee370a9850fd9321e334991bc1a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ITR632200462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e76edd00208715c5b559f980e3b95e810539a4d262ce05658e30e1ae3bb4ec. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ITR632200461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ef04408e3e1bc370cc894a4aac6903b4c595b3afce726394e9c55b9801453a. 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/ITR632401299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e27bb0965b3a7d4e0736754b1dd6fd6b0a59bf0f4415e9103b46130750827a. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/ITR632401425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47d253bb268da749d444b120c7fae24ccf5cc58b058cee62d759689ef614469. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:29:07Z), 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/ITR632501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6539c9b9a40db98b7c1e4de4cd782062011c4815e2a900f957b01ca1a8705d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:20:52Z), 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/ITR632501360.