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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 0x1e5c31cbf3845e5abf61ed5d973d8d5155903d3cf082b4640e6bcb87bebfa64f. 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/078a2101-a3e3-4f13-a09a-5b35c74ce476.json and https://artists.proofprofile.net/proofs/artist/078a2101-a3e3-4f13-a09a-5b35c74ce476.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 0xb4b347d19bede8ebe4a9d9dd361ae20a46c9157312714f73e9c830ccc1e6b0d2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUMEV2018653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e9bc13e786f4c5ed76a4dbaac0efa5242c360d434eb3ca0f30cc549416cb5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QMB622217302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c68930fb05df15db639332724ab2332214952a43747e49eb98bb9601cc3463f. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QMB622217304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0549ae4d82f51cc62b1eb9a52c2ec939ff707d944fd4ddf9f13d29642aea2. 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/QMB622217308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd6a1e09635f122fc9f2d21b7fc8f56a08eeaee1ac53a9e46094677dbfb208. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMEV2340171.
There's Something Missing - Bonnie Knight Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ebf1f18b481186988f0bcc3d5b7b2f29c1760ff3631ec888236fc862e230a5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/AUMEV2340172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f7cdb9acedd2cf8caaa3667eedd3b14be6c9d6a6985c0a6df4f8b207fe5b09. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/AUBEC2349169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb85daddc8499dfe8b9dc94eb428c31feb100c5c273f27045ba0e4cc20a40017. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/AUBEC2468217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aa7d323d8eaddea43fd6ea7065f617ed7546ab92d1b8718ac97a4582a92420. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2468218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f063f3183f296db353ec137f812586baf336315f12ac9589df634d212d0027. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AUBEC2468219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc471926932d0357e02fe3d64468227eaff8cdf25a52978e94a4e4e2b18727a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2468220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db0b49a2c9a2b134140878b427e0d54a9e9fc28da76c49c741a127605d0927. 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/AUBEC2468221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057ea1d88587c9c3fbd588e63a70a494d137d50b237f12ef14ae17deb9e92a44. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/AUBEC2367125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2d676ed6737b13d2722c78ca066c95348cdb3a84dd8840bf42712aded8119. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/AUBEC2518286.