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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6e665300bb52c58f7dc3bac62b9effcc91886e1e9edd06a070df3d025fe954. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7391c27-19c0-4c9a-bf2f-4c2b3a23d57c.json and https://artists.proofprofile.net/proofs/artist/d7391c27-19c0-4c9a-bf2f-4c2b3a23d57c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de77e13e09ace5d1ea7a608244f9bdf25eea428a65fc64b67627e9b30e0005. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:07Z), 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/QZGLM2476904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7da6ef5bbe290245cc57efe245d1662f8760c20fad50db0d029df6910ab7d6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZGLM2476905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c4fccb9191032bf4907574232d5ccd52acb846cf5ec1e92c77cb4eac7622b8. 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/QZGLM2476906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dc0938c234dd49bd6d715f744e84c15c250b141c48e35f703d98970119110d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:19:40Z), 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/QZGLM2476907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20145e97ba28e27f2e8c9240a8ae90869cf2cd327fad5306951ffbf9f37b078a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:44Z), 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/QZGLM2476908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94766062a63eb7feac924d8519fc475f468e720c996a8674cc122274f05a5221. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:15Z), 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/QZGLM2476909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a21536b6d624ebaf4d17e9efd7a0a9e29cdd5b0acada5ac918406601c7ba4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:52Z), 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/QZGLM2476910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592d2e59e509db9f9f4043d700f67551f061bc9aa7fcb6f2ea3dfb2f15ab7ecd. 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/QZGLM2492832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454d055824930ec10a99c213b3146ce9979bcd2c6f347be24753b7e4d84eac26. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:01:43Z), 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/QZGLM2492833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcd0b45db26a13159349174b4db80f98c53155032675bfc1880e1a7de0327c9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZGLM2492834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7f0e42c599f9b1f293f2438d1a3e62e6b1d4d6fa0b187fa54e2ee48f2d0cb7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:30:14Z), 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/QZGLM2492835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe050d472527439fa86cc173c765e53d286af9fef3928104a8231f430155458b8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZGLM2492836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec0c85f64bd8fd59aa774b2d50b0ff4ee84ce692a58b08178fc89082f0eb27. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZGLM2492837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff69dbb4a6c909d90d453b05a339dca26f4525426fe7c17e5467372e77609d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:51Z), 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/QZGLM2492838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66364973ef14a43a862fce9f4a43e67846efee9c4f670de0e560cc0237a3586. 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/QZGLM2492839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02943c96391fd5824085b5ce68483b4ac830ce878c2f6db0882203851f4a242. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZGLM2492840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc9c062e1395f238aa10a099c13b92cd8da7c74ccb730c1f249aca49fe08bb3. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZGLM2492841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aced98bdccc496eda5825736b251da8f4acf2ff89dca72fada978d73cad8a1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:46Z), 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/QZGLM2492842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b266af6710aa3bf7901cb375e3d2add40d2279864a383393d4f282933629395. 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/QZGLM2492843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f015d7d81f84795689ab9f8e52d1821e9b247f4f3fcf66de47c323094232b7b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZGLM2492844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7282c804e2fbcb0fc09c6f64472eca4a055a31dff653809b401b839afc969cc7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLM2492845.