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 0x47460408fe0ca4cae0029912cdcc00227957e39bdc8bcc0a056d456e4c513159. 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/4b132743-b695-4a87-8d61-b74dc9b35e06.json and https://artists.proofprofile.net/proofs/artist/4b132743-b695-4a87-8d61-b74dc9b35e06.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 0x0752f259b4e45ebe0eb86be7dfd3ddc6d86aaf138997194d40869d89bab91b0c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:07Z), 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/QZNWW2360366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06d9c317121fc52ec22a6e755df83e156b0c3c20fedc36d02fc08fd26ffe107. 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/QZTBE2373836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21559fab57765a3e9046dc8a9c22d434f91dda30df03a00b36e5ef608e2a2ad7. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZSYP2413081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dfca2a1a384c0ea5bfcf6db7a3b3d37acb0b9e055fcd9207d771eb2a657ac3. 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/QZS7J2442117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b330825fba57048c1382c85ce3935aeb9dcfe86a2c5f28178c482bb37779f52. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZS7J2406303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21559fab57765a3e9046dc8a9c22d434f91dda30df03a00b36e5ef608e2a2ad7. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZSYP2413081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06617d603afd001e28951bd7b9467f2345f042c18817f9f43768a85769d54d4. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZS7J2448238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c77b0a3071e5c3c62d4ceaa3c02995dbc9774a4ad3da6769aa9e67f45c57a7d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42527965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070aab33d28ad94985a4b98ee3e56c37d32592f9751dc92a1d2ab32687093492. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6K2592294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be95dce4feff5dd040d2cf805c19b5b64c245648b85c703a5c7ff06de6e2d51. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6K2592296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f1e4b4ead40ed2dc1505df08e2c7475fc327f1340a4a4465a6313a46d930d3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6K2592298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028373403cbddd7e0f50f7f4dcdb7946585d7581fa703012d6cd28a276b8a986. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAZ2597773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de7c46e184200998c476abc4a263483dd4288db2c205aba37fe22fa0849d078. 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/QZWFR2574228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16359c41ed1d8e036824527e437fa4f75668d054d58a4b70f62a8a84d8f7851b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:34:42Z), 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/QT3F52554536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756f4acb4aa2d7243eab50f575ffba424ef13c7d02633fbb454dd779c26ca510. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTBA2496890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b06fe7bb3c38ab4b8bea6fdc76bb03e2e3d1a266848e91823a82cca1538fd. 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/QZTBA2496891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c72b403edee3652a35b3e85df41d55843bba504ef4c73d4dfc80e0fb505c896. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBA2496892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e021bc5a4577d9fd1ae8d929ffd0ce053b838e798e46ebbb529d10cefd676d. 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/QZTBA2496893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10db22d16812c4f40860f7db77bca6562f6970b36ee534e8227ecf577ba87f9. 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/QZTBA2496894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5f790ad31a7dfbd4055b669811ff336ce85b179725c6e98ff91688763ac26. 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/QZWFP2324708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c891e965c9e465e8d6d06f6694e8161b1cdd782bfe6db81daffd28f7ec5028. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBA2496895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f06dd39c4dab3d89070dea02c585b1485aa9b4d9d6558844d7e8d558b88307a. 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/QZFYX2478230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33b0833e24edfc79dc17b1f85ba75f36213824a9ad610348c5b4d85bac0b28b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEN2421762.
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