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 0x894e435ae39b1f2bf250ca862df68f263a7ab2ed25f9736a9482fd902a3c3f4b. 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/4725bcdd-7269-4f13-be22-7b6905db48a3.json and https://artists.proofprofile.net/proofs/artist/4725bcdd-7269-4f13-be22-7b6905db48a3.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 0xc48c65c2ef79f46d9a201c0958cb18bfdf790259025d51aa45d291f07c4fcfd8. 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/DEKS81002501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fa90235692d27b48ea367cfa268ae544d53404f24e5a85f1c0ddf0be8c5960. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEKS81002502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d459a5190cffc2872d0a01f827e34583624c8b79e88fc8cc588a7a6e9256c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEKS81002503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df9e010d7c4dc07e13bbeb71213068319e0751802afe91a6980c67944a2e89e. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DEKS81002504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e9acbcb537a1ae479c8ef855b36827565ea5c3e19f6cb31fbc14457b3944cb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEKS81002506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ffb73d6569413fbfb752b10b3515a3f4b239ad36bb7cfbceef7c7430c7dbcc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEKS81203204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c4aee60c16027340877850a10070c18b060bd5c3b068c7a79ed66f58673e57. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEKS81203207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430cc0e64f0a1c8f15cdd1dfff855689e7815bcbaaaa8f23441b29817ec05bb. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEKS81203210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec54ad5938b56e6a0a22b03638b17a2b32748b38f9d38269a674e1594e5671. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEKS81404502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd346aa42c029adac2b3601c0f398dc260a67d7cfbb2a4051ff4c3b271921e972. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEKS81404503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d332a3a75ab0a446092bf1f22c019eded465ed7ae02b06b1ade33d8e5a6b6bf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEKS81404505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda97bfa202a5bd5f8d7b868a4ec10b9788ec5717ef9dbd9fd41d6bb610504b19. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEKS81404506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc079bd985305c9c07f9e09c83299cdd3fdd87cf7aa6e625eb99b8485a12db14f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEKS81404509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684900299d749ebf87da4b562cfbeecd0dcd45b4cd8eabde23be8c3df3e107c. 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/DEKS81605604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbd9755f25b8a6f2254dd243c56e42b96cdd915212fb261b431508e69b874c6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEKS82007402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b11c380cd1efb1dbb3550f1031d384cc4f61318b578e6e2b5bb4eaad97d6e. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/DEKS82007405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b974eee81cb5de33ed123fb0fdebd2237cc134482529633817c2203cd3bcf0d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEKS82007409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00254fd36f853e6654948561ac9080be77ab0f21e332552d2eb8d50e032a552f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEKS82007410.