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 0xaacfb22e23e2f114ec6b36877fe70b063be584015f54d2623fdb123a806d0a42. 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/0203f53a-c5e0-411d-b65f-ef9514939570.json and https://artists.proofprofile.net/proofs/artist/0203f53a-c5e0-411d-b65f-ef9514939570.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 0xc5f03278f191c7839fa78ad1cd57484eeba9839a355f1fbec93db9805db1410c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6HN2302976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17ec2bd48fdb93410cb1ec5126e27ad95583c80592c2d8624036bfd51aab416. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6HN2302978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f65b029dda4723ee7c9e6185650badce44154015c824063a9060a8c66e14b3f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/SE6HN2302981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0724b56c7e7fb8e2d4d2e78b94d45d4cdbb494e6abf3b1e4cfa3307942685d12. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6HN2319105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a0cba88dc4bf30c29cb5337f374e115bdf4d408b402fb0f13f055116725e2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE6HN2319106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a57f02c2b258a989acd9a50f65c5606f9809e2b21125cd393cf780f299b0d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE6HN2319107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707c44fe4dfd4ad5317edf825c47b768bbf664c114b7e3e7278fae6398f1b880. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6HN2319108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5f71d1af7022e65a7ce2e6cf063feaacb85ada0aff40146f8bfc519d28214d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SE6HN2319109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b4650597d2823c3a8c7d822002668fb42f31b8a4b59d521c2caf12f5b38601. 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/SE6HN2351251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea70b5d1e73047c000dd7779de14980750758bf543805bfebf64d90c4d96b411. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE6HN2351254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d0c9cb698b344ff09574e64a821d7116976377eeaddcd978199e9291117b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6HN2351255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d64f0326451af116f9700f16eb359455ad3abd65e883b9c2b4b785dc26acfd4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/SE6HN2351256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce7553c6517c5ddba96e8cfe18118f40809e8a6b2258b65613a18ef77ece0ac. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SE6HN2351258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e40ed2f7311a23377b546091d8032a1d92d9a3e25e0d78b7979e5920a7ae6da. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SE6HN2351260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fd022d1f8f73aa138895d6ec45a2847ab29d30ecfa95c231a7d1a1ceb7d41a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6I32305024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c250a0b12c3650135eb0d8f5079f93c14d157ed13642307c0df272c7e7eaead. 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/SE6I32305025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0847175fb1e892af39fcd9095a21c61b0851eab2b397cd161a5feacdc9f3dc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6I32305026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2aecdf8be0ee07edc6599ff110f577954f2c2124f2dabec2104b322919cd2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE6I32305027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe773f50a87122dd1e8bc833bb7a6297fdacadc7b826ff770851553c61d3d752. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/SE6I32305028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d02f85d3a30aae3f0ea06ef12a8d644439748dd63eb46282ece28a72ffdca0c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6I32305033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68d1ec833ea081585e5b8c6be4d42c205e811055c7ac33e7b27c77431ddf354. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/SE6XX2327194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae9eeeb8328c42ba37653e17c1e896d1a75a9815ebebdb4b2d4dc17cd2db093. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE62M2365086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f471d87b77c73094d027fbca6e7ce4a01acd4242f938ab63abfbff43d6cb23e. 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/SE62M2377460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4fdca4f13619421e6c86fc7e6648ac7e11826ebb994e42cc2f4e73c348870c. 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/SE6XX2376420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59663fb35727e2501865eaa8e5491c81c5c5aad00aa0e90e4b0327730681c81c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE66N2322635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d269729c1f8634bda1186fc2310966d7f0d6764a0d5d6729314ba8c0a200ee. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE6XX2306423.