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 0x3a281e9de063ba9f919fd1a18f6ac3ccb1240c33039129b0c2a46936745d5ae8. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/622d6c4c-357c-46a3-9e4f-37efbc5fdd67.json and https://artists.proofprofile.net/proofs/artist/622d6c4c-357c-46a3-9e4f-37efbc5fdd67.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 0xb087b58e6cf2b613cd92b956a79d9e959d28610b63d8ec3eba78a15ef18de3d9. 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/DEZC62576141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559ef5fe091018c4f0c37be5f4d12432cded45191cabb9f74456c891707471c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62579187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3018724d95ee711975568ace90274c029d114ffe9b7d2c31a3b242cd70f6792. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:57Z), 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/DEZC62580708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9ba09ad1c339af8e31b6a404da59dcb3594da114cd2da0fef91b7b2e20028. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62582110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b9ed6fe01674347526c16275042eb0ee64fe1dfab5848b8be3a94a4b9bba0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:40Z), 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/DEZC62584342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2360d2f6b2bffafed34974a5aa8a49e69fee29cb4c1b6380eabd9724f96e3e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:10Z), 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/DEZC62587403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af76d336ef1316b687f4e36c2cf2e047f581f570e190d01de179ca56df66fdd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZC62589282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c66eccfa0b5f5c3ee042a7070eef502582b714250e722ebb6b1ca484676f9f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:40:37Z), 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/DEZC62590532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc273fbb486660e78eb6f5a6faecbab9e87c5b91178fbdc816718b790b5599115. 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/DEZC62591702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294c70ac9aa62574f94acb64527371e8486c7effc66853da3c46dd6514ea71c8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEZC62592935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfa40906b19a48465c8313e1dbf1bce32c4acad1e156872dc248f05828569c1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZC62596600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e50090b525182747d3db3711f602058128b5b83189032671061945615b04037. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEZC62596602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473e16434bae507e6827fbb1fd41ac857f234a97789bf5060465801697b3d754. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEZC62510499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942dfe76ba49b373ed8a23a353fae078888f7e35815c68d00d47e0feb6b021ed. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62514471.