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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b758b926e73f8e33578b3fdf2fd14a98443a28b37063a5e80149b26b13686. 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/6c47c597-e73c-4438-a354-c7df3ea0e94e.json and https://artists.proofprofile.net/proofs/artist/6c47c597-e73c-4438-a354-c7df3ea0e94e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990236a1b3b91517596bd61dde0141897366f941972d2160aad93dab736b4c9f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:45Z), 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/QZHN92530190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e18553ea69228efa381e25f5a3bc0895388a1e41b343ba2c2cab11039f219a6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN92530194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3183b22b7f63a98791bd13728635f9bead9b6c0f9dd475f6605371639063f9. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHN92530195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b809a92f5ad84d630c7ad51cdc577c9d4594001f09ed2eb12e473222fa2425. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92530201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4d141003992796e8f625b6b2ababc95a132ad6c9350123bfe77f2e46b3aea6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92530202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaff106a022a702400a4381be8ecaf005f34d4bbb4240c5094cd46d9ef26170b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92530210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e71c9d54db4988d83cae5ec31f32f9adbdb87293f7a25ddc22a41a11ef1adf. 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/QZHN92530213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a9c4988e7bab2008ff0e5b4353062411890bb777c2c4a6e8ad52f8f1d40ef. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:49Z), 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/QZHN92530214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c801095f170fb9813fdae5753786fd7d45e57ac17d420c2bca9c999ad92962. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHN92530219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebca3b1d191c870311a3f258503eb30a47e2c65befc3dda938d57d0952d53a54. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN92530286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee77e05c425af9885ebd5162723c31c6874e997bf8ad6451a97d1f0187d5d7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92530292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3319d6283ff18c4508b8a0fcaca1bea136afe14d4101a8b8db996f19fc129f3e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:39:29Z), 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/QZHN92530298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f12b33dfd43b499025dd955f7812e870edbb619ad68f03e893cc5225d9c3219. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN92530303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52258ebbd0185e5a103f78032785471c3f39771e4411f7d8c596fa430502d99b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:35Z), 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/QZHN92530306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2694261dda2f98322ae56b2572907b2478ce704143b3eb4ed965e0267ef79c6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:51Z), 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/QZHN92530309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8806e9932498117779bcba76996bf5222b89bc027a24358637d183cd535cddd3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92530313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4fd564951b6d8071145fd1c3954cb453e9494da4353105d511db3e388d8b42. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92530315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b83355e82bccae04a455ddc530689b9025dc110131425011918d9a8ca5394. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN92530320.