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 0xe036fc046a5e6c61d4a1bf6abb55ea8254e78ceb3d0bd9a764a2069413de6308. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb18c159-b230-4ebb-bf8e-c90de8dba9aa.json and https://artists.proofprofile.net/proofs/artist/bb18c159-b230-4ebb-bf8e-c90de8dba9aa.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 0x7ec6d273b3f48e57d951954902e04eca040f95b4f7f8161723290d01a29e6375. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHN32566040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162cb568d1dec9aeee28a1d400c1b4d9968d7a39ae23e66887e86e5fd2be13aa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN32566041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a54b137219bafa204e9ae5d811588760a79aa87edb3ed87d7de264ebc45c6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN32566043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ac754cc2412c69268a71d93a82e05876f8dffb8fe2532d4679d43d9e491b60. 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/QZHN32566044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed668feb5d3e0ffaa28ca19cb67295fffbbead972da53e6a741d74b2a2f6714. 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/QZTBB2399926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973062ea290f7e20ade9f2be5fdd2e6cfab97605eaa8478d312389611093d29f. 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/QZTBB2399927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc081f91ed5e7ddff7b55eace595cf925fd31256ea2b93ff8be9a5a3fa575493. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZTBB2399928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf8bb33fbf3acead31d140ea467375443e255f702e22db8fb031da767303bae. 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/QZTBB2399929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377c073b62239581f0428a0554099931570629044bfafdaa8c895c9c9aa023e4. 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/QZFYX2407944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda070815cb1c52ece37a10423d8a3508615bcfc433b8540186a05277be20da1. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZFYX2407945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663c789e004d8e5712e34faf1fd16208859c28830c594dffd2a660bbcd060ed8. 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/QZFYX2407946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d15b587e472e336197fdf2ecc4b69ddd5021a133f9513c644b74865c99b7b0. 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/QZFYX2407949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc476248c55f98d83473cc975135e3fa05506354198137b5463eb67ab7667ad53. 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/QZNWV2532579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc4cbe639b175cd02dbbaab2136d7bd0128240152561765339a492179a20bd. 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/QZHN32477205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54990f1401d32f90a9f4ff811a0031f96da43abae97c8375efba80b89262baac. 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/QZHN32477202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9240fdb6850b5436c1b47b48be87a1cc3fbe8583b02a63d1e1e88ee16620ec81. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZNWW2561502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e315468880ed4fd91df64ae9c33db03ae52b8357744922ff8052f9bd2f7da3. 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/QZNWV2532578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f55c1f4a7fcd369c5a2db64b16a858a803258693410104b78c14f6299bfab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92365815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd047af47949234e27111b76d9360909b488075bd0cdffc7ccbc06c332b51c05. 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/QZNWW2561503.