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 0x55f22ba9d89590b1e8de7e167d2ad95edf6cffaaa9553c5ed561d7631af18cae. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef155bc8-65fb-4417-9346-7d201573f077.json and https://artists.proofprofile.net/proofs/artist/ef155bc8-65fb-4417-9346-7d201573f077.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 0x2f27b62b60f9f3c979ca5857bedbdcb2a4c3fdb9986f4bdf01f228247a475115. 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/USDY41785337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7b9ffb1398067df068a2bf0410bc0fbf6da93562d0abe9c9e0f36c76e26e8. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLRD51859858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804900e6d10ae2cb05c121a5d99c5fda1cf4583e1bcc6d14286a9d952c4b5377. 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/NLRD51831987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551b46cda4dbc5e41a2440d237a9e8e1744dff51523b949e9a771ae26eea4cb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLRD51831997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2eca9ec340b6860372bd32f8db3aa66033e6432a43c4bb12ce1b44832e5a6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLRD51831990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e72353ec68f85aa3c233919ab0818469092980953d1f4435892a06d77d76081. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLRD51831982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab042bab258a641b3943f941fec455cb06de909b9f9af0d559cfb13633dde5a8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLRD51831979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804900e6d10ae2cb05c121a5d99c5fda1cf4583e1bcc6d14286a9d952c4b5377. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLRD51831987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7b9ffb1398067df068a2bf0410bc0fbf6da93562d0abe9c9e0f36c76e26e8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLRD51859858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2eca9ec340b6860372bd32f8db3aa66033e6432a43c4bb12ce1b44832e5a6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLRD51831990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e72353ec68f85aa3c233919ab0818469092980953d1f4435892a06d77d76081. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLRD51831982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818025bede66d17261bd5be21832f6ca6f7e335c16540febe858e9c6c73703b4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLRD51831991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e406eba0bca7df5b7d3793cc92ab2ec8414f432f1382f458d82a0b4cee72ea. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLRD51831992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab042bab258a641b3943f941fec455cb06de909b9f9af0d559cfb13633dde5a8. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/NLRD51831979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b129dac6666f402207796dbc4d080445c05acc750020e18af561e7ee5e263. 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/NLRD51831995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd043ceed0a83f857f6ef63b043547eb2d17d55d21a652b6e2c96ebea1e24a36f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLRD52411285.