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 0xa072ca8abc3fd4bf26d3ca104860484d815b011e72f8d4ec4643ee8b4d407035. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57cdde35-d0c1-424c-ae50-7d8e9ea7ee0e.json and https://artists.proofprofile.net/proofs/artist/57cdde35-d0c1-424c-ae50-7d8e9ea7ee0e.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 0xdbca2ec7f31e708504272b81ac015ed35dcd93c06e954c63c8971f3b67c3cdf5. 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/TCAHP2398167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc3b8ed2435cb6d0762a8b63872fd33e595dc5af00af065a094b7be2a68856. 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/QZDA72326932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6644bd8a3f9f442bef4649d1cc38d72b6994b125aa103158456a758651f234ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72326933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1dc4cd1ee16b7363b0ddaad05c54623a6c88451e5a576e07a3b10964d16aac. 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/QZDA72326934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b30110619f34f450d8e9c6638c438726f5fe639a27432d849d6ba818eb1573. 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/QZDA72326935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea04041d6f606ae073fe3429ddc6963a4bf65d7eed8bc33adf9a3738df9897. 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/QZDA72326936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca039bc5d5846c7a2f23cbcc868648d5052faac76970196aaee08e907f3a9a. 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/QZDA72326937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb841255ea2b793a9c29bb4d250fe377dab7bcf76e100f5200d57cba042a0a49. 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/QZRP52154532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4df6fb5f391ebda2d1bea35abb07a09c0d20a0af6e96afcf03a2d6fa103227. 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/QZMEN2192751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ea32725d0317e105f8f49564186cdbd461da75680e3a85aa9004ff6e5be138. 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/QZMEN2192752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d2491ca4208bacaaf371f91f899c583336ac58c318c062cc0bc3e4c62a554. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEN2122516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae942ffb366c19d1aa515bb1d1bd9ec2bc2ee3fa1ec87c23465265ce6d98b9b. 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/QZMEM2186190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4091b796c8bd998c7e351a12f2e049dbd108ad6afe25f9c824052ed64f6600. 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/QZMEQ2434899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f31ab46503b718cb53261b7d7765cfd4702d05182ac0a1e617b728095a9739. 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/QZTB92285576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad53bd58429c93a9fc49f612e52e898bcd8faaaf55d1ab35939a30a22a0554b. 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/QZHN72281527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c14d48de20ee8206159e451cd4c7a39311101fbfce95c450af7d0b9eafc871a. 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/QZHN32239720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f825925451e359992e058125e7c9df681b0da1d5d96c0e42a1ba7cca505320f. 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/QZHNA2170934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13315620b39436141b4de507ad7e8b688e47bd891bde56e9eaad0159c19a0a07. 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/QZNWV2077843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165c0f4c2eb36a1f0179cda593d9152631d484d0eb37eb82b827529b667fd1c7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBMA21868869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cc81801edcaff2440eb96d54b7c8c1e5806104fdcd94e5d57b38d0f97ffde6. 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/GBMA21868772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab2eacfe089683630deff157980e8a97c77f3a01590f0883ec70bf95d5c217. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTVM2445459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf983fe15ce32c4ea8842608ec1a1f32499d45bb232359221985feb970e8de770. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTVM2445460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5726b87dfbadcde4b911a20ec546bdce5915c9dfec002828dedacdfc1ba8f04. 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/QZTVM2445461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32aacb590dfa3f902623fb431fc4f8327bf05cea74a495bffb11912f31bd653. 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/QZMER2340267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6868d181259845425e8734da39516462537e28f78a71f209b5e8631ef69cad. 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/QZTB32217895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3353f9f58d53d37084e6d01cd7525a885343bad11a1336646354df840e444ab0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZN882508481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb517c46e7b8e7c8c86d50a2a4e73da92417fdf1dd745d359d2851b72f768457. 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/QZN882508483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79060ee5f975d4a3a63ac2633ab5889b96f976dba7adc668696fc7ea55c0e408. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZ62152813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eee28d3926ae3567782fd2a28e7a7efeab1308d6386fdec4779d1e6e5a2d9a. 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/BK4DA2511781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6868d181259845425e8734da39516462537e28f78a71f209b5e8631ef69cad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB32217895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32aacb590dfa3f902623fb431fc4f8327bf05cea74a495bffb11912f31bd653. 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/QZMER2340267.