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 0xdaed8ddc0b60ad33255e8ac0c32d10bee2000603a05f4a7b7ad6d17309965b6a. 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/f812a721-f9be-4d93-aaf1-3c781423ef0a.json and https://artists.proofprofile.net/proofs/artist/f812a721-f9be-4d93-aaf1-3c781423ef0a.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 0x0238f0c7de522f70ffb7f8c720839c784ee3c9a747e1247e3130b6f5cd7b87c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DELJ82050909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2adeed10253e00a268f400085dda0ca0d65ff6f424709823298b27434934680. 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/DEZC62341334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d96a87347f82ae58f8d1a133e31aa8286fe473590ae6c1e200efc02520e65. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEZC62342692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef4b31a0e77e0e427535a6ecbd0424d2adb5d1929ddc5b5ff0a5b753abb4b08. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEZC62443931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826834b7fa0d64fecbb27a230b17a1848f32c9b5ad67f450c2405869ffd858b4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62445169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a68db4a6e39ecf8c5dae470d13316333dacdf33d0dd3948319a868eed12e1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEZC62445573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f106e2307efb7027b5fdbdfb534d0be67f76e4648222392295702fed654a13a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DEZC62447656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064a9cc9ec994a277f4b74300802608ee76526edba9630f733172446e9d835d3. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEZC62448661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219958f7b8fcc1ddae6ecf854ea84cacc489c0e02b4b16c7a3b2d4f8e4f4a80f. 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/DEZC62450036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9eb21ac06550c97734f3eec423afc1ed2e7f9ef4af529d6c87ef10895087d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEZC62451606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea40f011d1927b903e70a3d729b88f2cda64a5a4d9eaf5c4423381c1c933574c. 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/DEZC62452924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46cfafe864b1401d2863a49a1d98cc83b8ce81f2ff3c4ff9076edc8c1c53c03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62454452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45623341fe56cf97f2ce2ba1f5fb517e96485ac56c6ad407e028543785a1dbb7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEZC62456615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e7325d5e65e4987c27f86e09d226e1bde9a2829bccb16923bc84f810f4da3d. 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/DEZC62457791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e139cb7b71171f9da0c0f4d786b34927f48dcabe2af3dffde981bb113a55c90. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/DEZC62459317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcb3704eb96d714a34c6015a089fdbf1b61ce056ccf1a379cfae9f3daecfb94. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62462533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a10fdf0a24d9822cad43b3a797cc34b6115f4e3579c47106c380be367e8dafe. 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/DECE72001777.