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 0x891dd6e6d8a8af3248cbebe52417841613b10d4cc86f5a9423d0783dd333c13d. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38cc09b3-94d6-4714-8956-bd5abe057152.json and https://artists.proofprofile.net/proofs/artist/38cc09b3-94d6-4714-8956-bd5abe057152.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 0x4ec145318445878ad3e63d10c28a2313a963a75549e1268bc12b9ab083b24732. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEZ650602399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5fe5675dbe09fa96c7ab1afa326aba12046d320d5c66dee16b65939810db90. 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/DEZ650602405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58977ac93ab23fceb6214fc23cbb46ab4c8a48e48d2f1ea4c07af302b3a7df7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEZ650602370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd24525cbb93b54fccac54f3b43f0ab67f333975e0a2d0f7bd5ed9c27f4a65. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ650602372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be67f8af47c331d474be104a27b948e75486fb47d1551590ef46a729b02ca4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ650602383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1f147197525f5a294ef7968d1f2c8d6b753742c52b8021f5af04a18954379. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ650602406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002b400bfc1ddce3a6164aae66cb6b63969df3dfb222bf19c4bc9d94edcc1faa. 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/DEZ650602408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef9f84af08018002ea7ae1a70af7e4c1c7158432a3c934e3faac9fa691a57e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ650602409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c4bd33ea4226c65d5202c3fdf6393ddf9568dde2c82688d73e50da633942c5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZ650602410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62832d943ff8c2b2f393d5e660acc7d8bacceffaf3590c5230aca9fc54864797. 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/DEZ650602411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb953be4893f6e5ff00d209644229deb19907a2332ea53740e15c195dec5075. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEZ650602412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0413410e89ce5a7dc14291705bef114307b01141adb384ffb53f564cab05cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ650602414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de4eabf32d8398f11c5f4c630cac988c0a2fbc405b8ef371523e8f893427d90. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZ650602417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c290d50494261dd6b0bc45e4cc799f979623e7aa9b49e83072bf9efec76ad5. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEZ650602423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfb3d9de0eee579286a5b8725984fe0136d3042a454cdd761ccbbec2b562976. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ650602425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9ac804a7dc99c7e1fa4250245f47ecb9336d64727fd12274175215e9ea8f62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ650602336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0bdc8a5872716b536b41551a4b7c9ad33b07ca9f624d09f5d140345e1c5668. 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/DEZ650602431.