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 0xe084e2aeeb0e7c597ea1a7a3d8f48ff5e0e9009f8c61798a522d202653a17fc1. 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/46e8fecf-7ddc-4c10-99ec-014ed52fbeab.json and https://artists.proofprofile.net/proofs/artist/46e8fecf-7ddc-4c10-99ec-014ed52fbeab.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 0x10f309e88ee91c90d1979337c200de6603155a82e035ef64c84a4efb08b67f33. 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/GBKQU2011301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8db2fefe7a0a3bbdc407112cd556df8f497bb1766e81ca8cad19027426d28a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ITB842000247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e17fa19af1a6e0308bc96fca4458b1830c65db9934b0d1177330794b31fd58. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2026254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433eecca18b11359ae72a2f62cdcd5e7ddb7c53376a5dcc4adeb7cb451cafe35. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEH742037899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88df77332e4f82c02c71676133f5e348fd8855867257b32b822e9ecb6a2e6646. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USLZJ2174728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73cbaf6cbbd192341f4c66c018768015b681c98d623aac9456fdaff4352c023. 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/CH9742200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4e2917ab55ce88814a6354fe3eddabe48862ac5b030013290cb1bd5bcd526. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CA5KR2319801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478d3b135db5f4f47d44482c87590185747de8c32454c73359a5d35d380b78f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH9742200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27069c9d155cc69ee8d789893cd596f06fba7fa0582ec02fe57f88d06d03b753. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBRKQ2375869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4742012bb01b39bae9946a29c7a17f889fb7f84085ee1395576032b4725623. 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/GBKQU2380659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9653ee47c5cf49edc48c359a96bf733cc569d814c0e9bfc3e3017da69fea97. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/CH9742400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06c585420a45e5158176b6ecb1fba9e1c73bf6f79e1c4e85c1d631ae75f7613. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CACWV2497536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8209bdd8a667f9f5cd54112553e8b1963f11a62fc47bf198df51ed9b5482c22. 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/CACWV2497537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1847aca39cb96abf404526a56191de1a1ea98aeca1eca5882e168af83677d061. 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/CAENV2415054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f89d89303152bc15b0bfac829c63f9c461f9fda4d3313b0dd961d14ef7b980e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/UKXN22490671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cb662c70f0009630c7c477ad2f245ecda186fffead9cf0ae06bab9c2c5994f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UKXN22490672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09d45273ef976abfb8c57385a35a659db2921de6e3255762addb583dfbcad5. 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/CA5KR2501545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b555c27355a17626b0769674fa9bd25e4be4c3947c585254ce2f124e57b994. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0P2466775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48232750734538f0a71b154b58d6c80286f27e50cd25623f245341d76e3df130. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZZ762433803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b45ed9f11f9bd589dd0aaee5f959a41a5baf22f715aa6b1aceb6998b5d34c38. 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/BES132000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ea28291ae1f31ddb3195e8b010849ceb99d6a205f7feb139731fc145257e55. 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/NLD682002361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1ce97215de0d4c1d03e849bfe7a19bf0f06ef2a4b1e9ac19fb222253562e4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLCK42220280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3404d32d757ae4fb0a0db2e82da4602ad39765005de13a12cb72864760dc979. 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/NLCK42228720.