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 0x759f90270ee8561cdb3b1f818da7144bca26c8e91f06283c555c0010dad6f0cf. 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/5d90b4a5-5245-4ecf-8cce-01c60cff2aaa.json and https://artists.proofprofile.net/proofs/artist/5d90b4a5-5245-4ecf-8cce-01c60cff2aaa.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 0x5250126ebd65141c1c0bfe20b006f88780f5edd00ac0d3a5d7b7444595066ff0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD2110405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c57bd3015ea52a12a0835dad22c9bcddff7f5c4a0821e78aabc1909af321496. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTV32486398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca196195957f7dc9c788fe2d3369eb14f07dd38521a4518a9597303d3fd2a5d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTRX2420195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1418bdacb3eeb98bc8c2696d2bca2940d73c4df2b402ad69ea627dc9f8f9dd70. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2455113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5416328d6db5536b422874aa9a6fd844fa46b69e619467fe4c25aa0134f3cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRR642301766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db82ee671c78bd61748e63819bd0fe505e28c1dc6614da96822b5b1126bb6fc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2382766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8b0f9cb20e5b8919d275efea73c24906b9dbd7f9aa5e000c75744e61cfd8ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5WB2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f7b2b744d06f393ae94f93dc09f025e8d2d09e528756600d5e97b9195b8bf8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2358159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453104f2dcc427166ce036c445215cfd9571010dd76c154ab397ce20f427119d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATEK02277545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88da835f1d59e16af96e9a327cd9869cb00f48db0fce201ae587618e4720533f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD2210265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e6f71094bf2bf65da153f532054cecee9a7a077aed8a1d98606a2746c01c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATEK02277508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483668deea6c303fe65e74e3609b14172c7d9194a0e117153a75ec3e973d6ac6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD2210047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4675270c1ee683808436e727ccc3bd4d4d908fb6637bc027052c20d5fea24342. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2204056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ca4a12e2cc27cadb94bdc6eb59a8a9e30e0d6aaebda7d4b1e87a339eb5b33d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATEK02177122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd84261593f9be7824cef8123294544763baba8cf863a6d53dcc793682689c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATEK02077128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9500571f795abce7c9227d30d2d434d28920c796d58ac56a18b37606e719c489. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLXS82000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6747fe8c720d1a39f3fc69ff96c696902d2a76c325adcf781899c6e7040ba08c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE1954776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2852b884b159d0cc5b52946916c815ac448610fc8f62c8acce4256a8d5714f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5VF1905136.