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 0xed72a9abd60d2269d48b36dde327284c8f828b54b27e2081d56cd523c111c599. 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/fc667feb-ebfe-4abb-a951-ef3e7efab394.json and https://artists.proofprofile.net/proofs/artist/fc667feb-ebfe-4abb-a951-ef3e7efab394.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 0x8d1b4b79e6c65af17ba1e37695ca15f25cb09a02b99589772a84640db8e19c5e. 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/PL56N2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee0c853e63d079dc16fa472df5ed3b2543c3caac91957525af0cc64f1c41ad. 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/PL56N2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1462c4b2f567e300627855c305e62e1bc9a7aee4ece78c31bf7e763f4c7bc1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PL56N2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b573703dfb76e6b9e1a14b8f01cb6df89cbc4db2bf006b495aa26bdc366a867. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PL56N2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2fd45f763174c007e41d70657665fb04fe0e534cd87942c2a0528eb8564e52. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PL56N2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf4bfd90d7cce1dc9f9ac5d9a8a52c85cd5afd28b5cdd091873ee696829c23a. 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/PL56N2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052cf76d0a0508feae1fa93b9a1c71544af1b866af3f0ac206e9649cdbe752d0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PL56N2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5250819dd3fe69836dc04a2d6709830b8af270c65f2e4938f9a910d05db9765f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL56N2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169564e945a807e438965c8870f7ebb3f78580925d7521ed1485176ff3daaa00. 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/PL56N2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769fba0d32fe51f88c3654c5cdcd8551882f426f50cf4eff83e7c0d3a1ced10. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL56N2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aac937d3a36b4c4811fc1605ede158e3fb3381a4cea61186e0027d51f3fe6f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PL56N2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b683e07de580851a1f7cacff406bb5dc9229f3c9e2ceded12f08c029448b651. 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/PL56N2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe0359962e4b2cf8029875d87953b73fa7d513f4dcd95bb83a301038aaa500c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/PL56N2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47cf63425a4eaabd69a69df266e4657692f23f9c6d2469656c9a0ee37ffc62f. 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/PL56N2502004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aac937d3a36b4c4811fc1605ede158e3fb3381a4cea61186e0027d51f3fe6f. 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/PL56N2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc016d7427ebd410abeac22d6dd8ad3474d05fa11355c82dac103eb40b2699b9b. 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/PL56N2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe0359962e4b2cf8029875d87953b73fa7d513f4dcd95bb83a301038aaa500c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/PL56N2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398f11532f8c9bc07d8c9193b415c80efe963ee598bc3b4999875363f39867c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PL56N2502017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad28004ec2fe4cad0aaea74c66993b3910a25707adc57ffe7c5c5a2e6443cf1. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/PL56N2502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fc397199ab5e4fb29b3984c13d920785f8c93a626b600f91e91a58b31399bb. 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/PL56N2500022.