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 0xc6afaa9bebf279d20bf134c385b0b2f40d93b98b96f81b07a80426934697f8a2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/914c0c21-ab35-45af-b686-149cd926d0e8.json and https://artists.proofprofile.net/proofs/artist/914c0c21-ab35-45af-b686-149cd926d0e8.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 0x3bcaa15f7555051854a2b214a8d47b00928fec2e2db08c1c394bddcc66cbdc34. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEZN82500466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd879486f900c0df42baf287050b2435fa754c43ce5241510bc51b1a8cdfdb46. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZN82500487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eafda19c1695dc9a4b99b7ec583571ae9fd1193c9e7597344cde1dc461c5f9. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEZN82500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93eb05a314899779b5c0fcd88115c7f4316d113d7a6464bf1061f651a40ffc5. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/DEZN82500474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e934ff9909f3b26d7ed4d3b8c14f83e956589c5c433fc80811deb50e0f3b81f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEZN82500494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17de00b6fa7c4e7c382594b1b0ca2b0b1ce5d8c4a96e10b0bd1987cf2cec923c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEZN82500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d679c814e153c4eabcfd339fa03418c793f3b1415ee48cac34081d3f0175b1e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DEZN82500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85ab8a5665e3f1451cd20eaab7847d09f5497e672c7eb5bdf99343dfa9a7a53. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/DEZN82500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd9cff62813144e550d74d613c5f14479fde7d2d6b1c5f30e7639286eb2fa19. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZN82500496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e3fa6782ffcae9622410ee0ffa9d5505fcce1f7dbab2a2023cda66f2743ce. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEZN82500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f244926ef2b6059c998027b1dea40c207e69ab2bfec287697be99dd7ec6a95. 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/DEZN82500463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208d699bd0240765b755821cf3130034fa2ac94b14d440366f351b382f59faca. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEZN82500507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81fb99e3359120e57d32352d3636dcc81a0c1f301f181ab60095f37d764d8bd. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEZN82500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bace6a3691b4fb18301e063adb19d0834a09eaa5f80268e4dbe09279935dd0a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZN82500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af996232ff87df79e70d07878c756058cb1dc4ccc33d95e42d99f947329d0f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZN82500491.