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 0xcdc789e21ac7740663aad7ecad6ae6b30d1f2fe73bb2d5ee10f6422c84c83156. 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/3d64df48-171c-4284-bbfe-dba0c496cdbd.json and https://artists.proofprofile.net/proofs/artist/3d64df48-171c-4284-bbfe-dba0c496cdbd.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 0x2a749cc034f34eb40095315e0c5149db9108235a761fca58e0181a1f5bfa7194. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZMEP2052428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f98eaf35d5b1bcf6d15b160d30c496c03fa0541e230b493cffaa69588541227. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWT2005408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0712ee4039946925687f58ccc308fbaf5fc57f645b5360719a3877102cb16391. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZDA42118991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882739c9c99e8cdc96880aacdb4a118ac203066d453d5c83635c6a83e6c1b6fa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWU2018102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f6d936d4a22daa1c9f94881407b47aa2c29e487080ffcf729d603b9328ba2. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZFYX2100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7634b6a61a1c72099e0da448d6f2814f1b854714189627a9532cedd3ce04b5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZES92276870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f42e1fb5e9916eb7c827d84857ed4203237c8be9f4e78c5d1ecbdcd714829b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN62213747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0316268bf52d4b1131eda2cf97f6ac381ae5d7a1dfefd82173a9d1ea96d63d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNA2210512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b44328ab24692e0c2a57227748edba859a5a1ae4be0549e380e01876d8a0ef. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZNWQ2213191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d3543de4756768a9ce70f0866e514f5b863d46d598d342e69c539610892f2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZFYZ2357999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b99820e6e46408c2b5c2dec1e649dd472392f7b163e2f8f80955d9b2ad0b7f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZFYZ2358003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bc3551cf4370e791090e0e4cd857ec3aa3a97f492b7341c8bdf1c501a5b341. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFYZ2358004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9431558ab20cf38dc29b9cd80db4e8168fb5f62c191eafad3ec43726007f00. 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/TCAIV2445409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a5b4a82f29cde3f5e0c0d7231cc531aa19ea87e4772750b659cdd85f8e4a1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIC2471074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608adbd8f8958187344f3098077c6c73be853c055bcd8cb8e8401ccfee9fe925. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72578184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc56ed38ae2b3dc17f33e8859884dd8ba66144fb9a29aca7281cba10af2a322f. 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/QZFZ72578185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901040dd61ae3dc88ad9b7fdc3a705619143514ed2a9f2a943ee74d3069b97eb. 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/QZFZ72578186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b45ef958426b6161c201595e0904c2a30fe4b581649112312e3597188d8193. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIC2483220.