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 0x0008a5dfb2ac86024d0bc192e3b07576c4876147ebc63c4f2f7d415930b678df. 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/5f5309c8-041e-46d9-81b6-0b3d409f141f.json and https://artists.proofprofile.net/proofs/artist/5f5309c8-041e-46d9-81b6-0b3d409f141f.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 0xb3f52723f9b4067386f1da28731835fffdc4464f363a1a21217c5dbb457a350a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZWFF2311789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa64421b45a00baae2cc4552e68fe2922cf8f8df17c91729c0b1cc1e58fede. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6G2418160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36d846d2c69290c6366c0d3729b2f6ea982ea3f18ae085d9b5cae14dec5f11. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6G2418161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bab1aca0664ae3f14e4c36790e411a9b816431fa43d9837ef7f7d9f14b057f. 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/QZK6G2418162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17d14f247855e180067375ea85fc09c3d1f962b833b8bea14bf1772bab0ad7. 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/QZK6G2418163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35071f887efaf7d30f22abad37e63ca3c842b36ce190f99d730a7d4d4aae04bc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6G2418166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc87d0713f18d7aa63085cd3b5dace0465bb489a18e3d482addb9aef2c5c028f. 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/QZK6G2418167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba2a826d25c2a79db3670aea6949ba18340c8429d503e6363f9856f84c8887e. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZK6G2418168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deab3ff95796cb70f3e5eae5572d817d1a8a0a42e06457afd8ec18abf107c29. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFG2499456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05efe3d54c5d7e464252a7adfdf8bc9e4aebea433c6423fcc0f5c6476ffbccdb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFN2419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05efe3d54c5d7e464252a7adfdf8bc9e4aebea433c6423fcc0f5c6476ffbccdb. 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/QZWFN2419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2122190211c396ba5e02ce0ba78ebbba5dee1b6f6d787852ae10f9fca2c992df. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFZ72513955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b483938ec4ea7307abe57a4b5bdfb42201d4072770137847d5fe2dcc7de18. 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/QZFZ72513956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0cd9a64715403526b25738f5f6c43d8f613c25d43a55a512442bf69d620537. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFZ72513957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820929b758e217b12b29350ac28754e7dbcb74d4ee4b202a1bb2f5a2d647e2d4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:36Z), 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/QZFZ72513958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbde2b5e9511803e6f9c558387922f38ec3fd2edbc8572e0db47c5582aa7711. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFZ72513960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deab3ff95796cb70f3e5eae5572d817d1a8a0a42e06457afd8ec18abf107c29. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWFG2499456.