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 0x567c83e56ac40e5fa867f7ab4d8b65a35f146948197ff0cccd0015c6ab48a584. 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/1dc2a5c7-f21f-41e7-919d-68ed62e34cd9.json and https://artists.proofprofile.net/proofs/artist/1dc2a5c7-f21f-41e7-919d-68ed62e34cd9.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 0x872d349d51ac9ea0d479ad8b8979d7a47d7f10f4da07f4c4b78b4eedca7c3420. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRX201619319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fecfa2b25d83493e88169add335713fd81618d1c53568aa4acc529ebbf018b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FRX201832512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd36814d0da387c450a5e2b2990ea44e93e62cc2993827563c8985e2c74bd9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRX282101978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb353ce0b2e7529a1f9128e364ea8e1434ab1f80d46dc3645c68ae22c42fad589. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR10S2210498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d84a607e9c46ef27499ce0b40949dbd9f6289916f677b13ed8f12216ec567. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR2X42245003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d558d5bb146bdb605bcca6e0cc3fd7027cd99b5d78b3ff8749eaa216de1857. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UABM12200489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88935754665c2b35f0eb180a0c6450354cea8e8deac24619ac6928acd7a0e8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QMFMF2361193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b0ccd7a9ac3668080b651fdf0c7ff8bab8d2c4ec332b1371ac4f2531825f2d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QMFMG2366335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf37cf3c6849db7a54944e7fe0356fbbf00512e085429cb2498697ac5da01dc3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TX2450257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b673867ae71d5bf84b935b74df15fd1380349a8abbc9f9cd57fe0de2ff1e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM7282464258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0f27bbbf433fe1f6158201ae40eace6c063eb068b2ab5def9b109b8ee4256c. 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/QMBZ92467804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ae6068b3f4be2854e9e110abdf03db7b39f119dd02496520ee9e078a5e90e5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMDA72493847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e01aedee1f2cd134e3d24515c47830d65fac0a12612a954d724aee4e55bf4f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6P42522663.