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 0x3964cfbe892a4ee12597dd6c1b0bdadcaf8bdc256199a7c9d02beefa5f6b7b6c. 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/1d75c1d0-5856-45e1-93c1-fa456fc46935.json and https://artists.proofprofile.net/proofs/artist/1d75c1d0-5856-45e1-93c1-fa456fc46935.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 0x533530ea4a852fdbfcd693a34304adf47f86d9194c6aa494ad17f009936921ae. 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/NLRD52062867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a01c827fa3c10e197f4cb609076e7c7bbb7ebff6e3eff33d39916df833f51. 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/NLRD52038959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe231137a73f79cdcb22ebae4cf2aa1d5fb1ee87db5a7aec9642cbf8767924b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN41983964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe316e9ec2aa7344273ce60a20d9ab0feeaddd5acde72fc7b6439f5b4f160c5. 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/NLRD52028419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe266897f8269aba90c6060772435867e96feb13946e639ff67c25dfe6130de. 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/QZK6N2157372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf96a1c0b6d6adc361fdc473712fe12e5309eefbaca166598fbe6b3e22604066. 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/QZHNC2165714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64e158c8b41a70043c099da289e56b011415f00f3622cb62fc56b3843dcec7. 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/QZHN62166610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca90f9501131a7dd10ae446ffad86de7ebecf971bf9cc2865e0bbac54289cb3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES62191217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5f5e87b6726b051ae0e0f55a108b7e84a20b90157545bb2b4792202edb98aa. 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/QZDA82160096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a0100f5b2d60657da4ca00a6512a3db6529831464bd2228a7c4cfbf524cd0. 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/QZDA72123819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46c94416d3646be75399bbf6e4e62741260e06049aa1ab41f6d273212b992dd. 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/QZFYY2162282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec635c1116a6230c94b05bad879a5a65441cd1a7779e4d64f5b4bcc144110ea. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/QZNWX2051552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddd06e6319ace10ddc4f8289d08fda2c7dc96f3fac9af646b0dd556cb361c55. 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/QZMEQ2004264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d674ff34053657726f632d8fb647b6392ad273fba21bd918e8cd40e6e68575. 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/QZDA82098162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd092324f916ca01b9a7a5bb35311fcb0b27e611969635599a38bef06dcfc1ad5. 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/QZDA42015732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2c33d62cb9552f8eaad0a8c2f65e7c5f91f7cb41e6125a8f7e427c6bd80641. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYZ2097163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa59399650ba490e8915f1d5600265908d3b81765f83b5fe49f6352b819823. 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/QZFYX2076086.