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 0x540942209a4f5b612c3860c1081b2e305895874abf85001eec91a5031c584d51. 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/dd5b2524-4dac-48cd-a067-cc37fe1ee43b.json and https://artists.proofprofile.net/proofs/artist/dd5b2524-4dac-48cd-a067-cc37fe1ee43b.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 0x275ef5ff3c580ec00ff2342c7a0ae0d66dc6149aac21da85943004796f2f5b73. 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/BEKX32100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a602f9b8604c3708c645d543db423b8d62cf0ab44b60240e1a701d08b89db9f. 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/BEKX32100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b105090ea6b664266d7d419400ebac75d907a462c0b24b7d7a77de4e9c0bc0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ22165371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe803afdfb83066ed2ad0ca86e38f4c1a89159dbee0ec29f9891ede99241f15c2. 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/QZES92079028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f60ea0bd4ccb1b7ad721584ddd1eafd48e7a40c17dbedfcdc1fbd9c976f1466. 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/QZES62083845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08c442a4ad5f4a0817af77c5e665460c2e4fd5a337dee515073e12e75cd5abc. 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/BEKX32200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7bd98b7f31a08fa750716ceaf21458ccd8b26862fd8c8147040a61a773274. 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/BEKX32200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628081cd0a64788082ba8af897716617ab493467b0fa81f8a4928db8e3146245. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:29Z), 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/BEKX32100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6803716acc14af04bd4923bc8311226b5c8c99e852477da7acda40a3664dfb1. 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/BEKX32100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfe2760e8ce783ff331c8efff378c9e393e18bcc503d59c26159fc99d4d676. 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/BEKX32100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f60ea0bd4ccb1b7ad721584ddd1eafd48e7a40c17dbedfcdc1fbd9c976f1466. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES62083845.