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 0x0fe22b765e81bfc8e7e4b09b092d58f3ec58de8f772f7d9cd1639114a75123cb. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6adfc329-b436-46a9-a417-7716e13ee2ca.json and https://artists.proofprofile.net/proofs/artist/6adfc329-b436-46a9-a417-7716e13ee2ca.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 0x781918568db760aa67b8a956665ffbda4eb8f48cd346e828e17b35a174a4dc03. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/USCHR1302110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476fe6d70ba8db602e1173dc3f9bc64a705aece63be21f54c83e2f51405868fe. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/USCHR1302111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec78c4f746fde1a278f8b318b5f469d23587486604c26545a3cadd02a67904a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCHR1302112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783867933edf926feb5e0d7e6a27d5ffde375ce3042245ac113f2d225430d7cc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USCHR1302113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260983d57bce92aba64be3a46e582eb3f198c3cfcc88cb8017adf878dac7cee7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCHR1302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b049fe485956466c6e189ab2b410e728ca93b5e2fa512b120f3178169852f2. 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/USCHR1302117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211f291aef2fb2f7f71e18d3b0fa39224541d57fc25238eb51ed29b5c20e88f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCHR1302118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dd4ea202ff12ad7633bc7ce1a1916f0854b925cc40e61f7833e9c0f5df401d. 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/USA561432549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a3a24538c2412a75a395988a9f8b35af4b62277af36aed1415ba1cc1cc0ca3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJX2432046.
50 Años Golpe De Estado, 50 Canciones En Dictadura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760a52a4f420ba3c38aead11691d674b26bdba28a859abb2afa6e2a5073aa9bc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA62383033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f92fbd70530230b1b91ed93442761da7e147c352e34833268ae0b7847e66529. 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/QMDA62383044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749ee338a1b2999be7442b0b00a0234eb3bae534e64c504ecc331d8ad12b3465. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA62383048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a62056621086c4208f8559cbc6f476348deb8d091d7baee9f6f7ab80e6c3058. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA561397455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20e8cce70dcf2a647417e6de5ab2b54bc1f4f237218a606f54a3a0d466b9c5e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA561397459.