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 0xbc4149cfb489850f2e09f3caada5df8dcca9a809481217d88522caabb90228c3. 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/3b58cb6b-aa36-4aaa-8bad-1b679cc1e231.json and https://artists.proofprofile.net/proofs/artist/3b58cb6b-aa36-4aaa-8bad-1b679cc1e231.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 0x1702507ef388c81c04ce29c26775b6b42df90de727ff933ae7ca9e8eaa54fd44. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEUM71600947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d49905a9449cdeb5d485ccc2262df62878606897b4c8503935e9a38978e764. 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/DEUM71604315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a77ee470717449c75555cc570c721bc5963ed8d85e342e3b4576c5138ba5a61. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEUM71604591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01efb93e7f9d94fe64444b2c4f08a4a3e1f240e8bd2093dbfa6e245ce0bf5074. 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/DEUM71723152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2335bf0b2b77e6fb06c1a5d7544dfc845b60a6be60c04617a9fd077ca28164e. 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/GBGLW2400872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f8d94ed2a3faf9da64ef0b72f1a7ac48200c31a016d9ad339019e884a85b5c. 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/GBGLW2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d77c1de96fd03d2c5dc3796adaaf9bc16486e169388ad9cc562c10e535dccb4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEE861700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd25b088b6333e99a4dc29833c706685920ebc743f49edb53c0b94e3eea8e2. 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/DEUM71602806.
Anderssein (feat. Sara Hartman) - Egotron Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9950e5513884e0371f015b4078eabbd536b31b74e59e3b94e885085d50b026. 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/DEUM71602878.
Anderssein (feat. Sara Hartman) - Akustik Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50466f10cc6fcd1f6d9f669982eb56376c0686a2744f40d412f239736cda1370. 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/DEUM71602881.
Anderssein (feat. Sara Hartman) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d1ffde08bed54853aa4d7a28e15debd199f6190a9fed199870a16c22e1fe98. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEUM71602815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bbef8784353b15de4f12cf3b02f6a9de3397fd9a3fbc6577eacda11170a76d. 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/DEQ321800250.