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 0x5694a1705a7d5b788de4b684ff84e1fb8259b5c0d3b84bdc0fac4add53049982. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed926a5f-aa5d-4ccf-9b56-a98c2b0811ce.json and https://artists.proofprofile.net/proofs/artist/ed926a5f-aa5d-4ccf-9b56-a98c2b0811ce.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 0xedc8318324f2cda0dbe865a6281546cd40a03a6257d07766f20ba8ead37f5d7f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLPF0604570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90eec864502cfe7d7e8933d36bccd03fdae3544cf3d0872d8f0af1d0a9e77b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:09:42Z), 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/GBLPF0207383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916c2f02d11a6d604eb2b87382f0d1ad76ff8771c2721c61f9e1f155ab7698e. 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/GBLPF0210879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2fd08e95edefdd0b0f7d856e3d36e3fc82f5f5bf7b72748bfa667e214761f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF0213135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e545ecbfd209e1785eb022751ad4b8b6efe12409a0d2b04e5b872db980687d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF0217267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d2e0c030a3d49fbb942ffdac091377f4c15ed2d1d1d9a6e220a3c9ca9c2da8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:18Z), 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/GBLPF0215584.
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 0x6da10eef0afcaf035124586ae3fbd0b6cbec3ebc3410bf137547d3695980ae8f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBLPF0605119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72691a4eefbdccb2985f78beb3fcdb92efb89276195214da26c4be3bbc7a91ed. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLPF0608972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23631b14ab14650afc17af3f22555a66a6bb31f4c5a33f06552fc600380bcfdd. 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/GBLPF0208395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf995fea309c9fe95a4ac95031e78efb29f87391460c78c41431f34a94b6c2b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBLPF0218328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6648ca0436059725ed4f018e0e4e16864796b64f18e302408620fa5389d13c. 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/GBLPF6809557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa7e4205369842485653fccedacb990de913074416e92af08d33ceb084f57ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6791229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1470fef39af5626075430260e49de4579ae19e4a9e272e4e8ba7aeaaf48463. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZ5AB2412014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30b661d70cd908035f356a78d00cb700dd4fc334bba2ebcedb22d1f38930f1f. 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/GBLPF6779590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995153e4118a83e4ca1665b841fdd7ca46f67eb034961d9127d7a404bf6a4d42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLPF6768279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579bd22fca25a440883cf180467ee63bce913e46d1adc488b6d0a7e09dc287bd. 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/GBLPF6765586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9db1c41abbf0838cab2970828c0ff905feb6932cf814c5db38a5c8f8166789. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6754528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14aada54a2e046eaaa988fba12d690385ece4425fca4c3ba0b441f581155695. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6754526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5782185b2bd509a8dc4741ede617a8ce84e684b8cc5f18f595cdcd2e0ca56067. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLPF6754525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e73f296c98c6adc5f71ae7bf37f7978b5c015ed30536d0216a116c08de081. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6729173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc1187a37967bfb36dea53047a1b79902b5919087cac319563db273819b0c4. 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/GBLPF6723266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350598ceeb40ff1188a7471d4863c2a011908444f0c72742613e78d15471bc02. 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/GBLPF6715474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc393993232deca9bc3c993696dcb801af3daa3bfcfce6beeb1eb3f0412500. 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/GBLPF6709890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7e16d4a345c8c51d4d66cc1cc6b326256af633dba6593950decdf7e3468d36. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152100961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2aa4e735d63914f0c4f163a41ae549a63b95a258e86f1096e10a04562ec00. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF6688682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250b61b428a89f8c1fa8388a12e188fab3d90085da3808fed6f4cd3ec6a2982. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF6678473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87af4c83a5d5c13f0b9de7d03d61c58f980972af13015bf0b6f8073d8e1be57. 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/GBLPF0299334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730ab0875c3fd1749764274d7819763fbde1ae4cf0291ac1d717cc751cae0f7. 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/GBLPF0284834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f42451e7a03da6023009b9bfe158ef81248491ab53317e2a2b664e6b74c9521. 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/GBLPF0266111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530d9747bb16b9a12a1fd41b3baa47faa430b7b3882e13dcd2e118d8a4ffabe8. 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/GBLPF0263801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dd8cc17e23e5fc1c63ab3957f7c1a1a62ac0467a1ddc9b4b0914148d9669ba. 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/GBLPF0262552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb8d73471c95a89133eae40855855b054422a518d435aee1c872a44d442b8d6. 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/GBLPF0259698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d084623196b2027e790ce54cc6b030303bd47982c94522ec0124605859c51f5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBLPF0260343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212da1b870f5370ecc9c3631c6bd29bf8cdabf449498a78abd1e885b3ba907c6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF0255725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad35ba25c2d2be3d35b3e884dc3da22df8ae2880dbabd5e5241444ab4f1525. 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/GBLPF0247014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c17061b7b8a55352db4046bc6a58aec6bdd7d5d3960ea2e89b2d7eef8b87e2f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF0242337.