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 0x0eaa9fc90ed9415c0913d5c3d773107c2c5f15a3d1f3dcb43ab9ac89dff9d05c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb3a57d2-6540-49e9-99a7-b5ed198a7c00.json and https://artists.proofprofile.net/proofs/artist/fb3a57d2-6540-49e9-99a7-b5ed198a7c00.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 0x671a8109d897a127099f6df8ef79958fccac07919bdad075e4052a79e8801bd0. 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/TCAIS2452234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec5575c5817a1849a0674acbe348f6d87a47d963e80710a0e533c90b643b27b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIS2456450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c46c53c3476f2ebc4c0805eee5e893192c36e188f3ea8b2b8e06b18464fe8d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIS2460949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea3d6968513eb01f05927a301ba63467c97731ab26ae78cd31642acb183f63f. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIS2463676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fea8b7e22fc9f4c2c579a951495f7da1931780bce52bf7da8a3ada4126f8a7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAIR2465870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8e90956996a9cbce9135163794504c5ee67520654f7c4868f2d12a0cf5d211. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAIS2476225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b463ba0fb765e69cc3127fcc5d4c7f8ab2837cf15f9df6ca67214174cea14. 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/TCAIR2476374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0fccbbbdcdd69c66d6dd90bbc1e20c0683c132cef3e8b45413407a314ebd3c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAIR2474114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ff951f3974f9f9e5be4f18f565a5b26540d64e295c16a7487affa2f7dc93f8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAIR2470507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b2f17e48c079af1b60ed6fa85ab0b847beb24a2cb46ae589cb9859df67f7e. 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/TCAIS2472972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182ca3632b283c9441ebd5e3db77176e576476399242518a9f2122f6a2b0385. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIS2423915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7053ee6a99782c4a007ca6baa5c2eca4bf573dfaa48388c445783354ba93acae. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAJI2536267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d63588e218bac4e229dfaa99fe94c1b79f436c3c0709bcf7fe0859deb91c98. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJI2535867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96660316c456b97d5fa68459f0cae17567dff78968519777c7fdf9011307dc. 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/TCAJI2535734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762ffac5938ef2e45c643761febf52e5fd89498c88977f32211cdd35495452ee. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAJK2536114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60d55b518ea1775874777e672113e75a4ef4e598fbe26cbd727c27f3fbba33d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAJI2558032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc97c4e5d0f0f40b2f7e993fa26dbde7f8791614843093b618a1ed33bd2ff78. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAJI2557830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ff51f8b53bb727ab1b9fabada6fe149955ca2a516484f9faa55f1127e626a4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJI2558508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cc5717c4f061813d284d6bf4371d078e96dfbe7c60fde4cd79c8fe5630abdc. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/TCAJI2558249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7845594a307ecb9d51256b76c9bddedc65dc40e0e207521aa7dcbb43d113db54. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAJI2557957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780a2aede45f522b3e2eee3758a7dfb6b7fbeab3a7b11510ad87f9c585b9549. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAJI2558135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1007837065b8b76485b7c74733e9baca62b74f76a671baf0e8d4824daf781b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAJJ2511152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0412529904e2d9bc8e9be45505e0f734348e5b15fce5f11e94abb62e752be42. 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/TCAJJ2511419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7262ad60a040de7dd30c5b379123ddc1df516f1094d6343ea7544afd33e72342. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJJ2570563.