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 0xa7ae308b61f64a59e053f1beb68b64a9a6e92c25c8d746d3acee35ff6690eefc. 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/4a9b19e8-89c8-4734-9bbe-adfe2173a74c.json and https://artists.proofprofile.net/proofs/artist/4a9b19e8-89c8-4734-9bbe-adfe2173a74c.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 0xa3cb091c8dead2230b9e3cd441a289a14d1bcf1dbc078119a80d864fac471a2e. 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/ES64E2306976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c2775f3ab4dfdc5c492f197a8d4a617461087aa82e7717c4bb33cef7f353c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES64E2203798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f862553e580d3183b92a4e96a98063331274e264566180101da978e191af3d. 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/ES64E2313436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86bb549cae37f943d049f310718198c6e6ba9ae3df87b635344f15bb1f0724d. 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/ES64E2200824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01d76da85b5849c5446410c3b023b3751f0c31e0c7888fe4ccf91028161ff62. 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/ES64E2458708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0427637e80ef9a789a7c26420e58840705c407ff98b423775e1196df4762c63d. 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/QM6N22119601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe446bf2fbd9337c79b45ce8f95bd32708b9ba65cebd92f7e8f87132295e7bdda. 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/ES64E2303169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d86331b0a73330d3ac833197b67a70e3b98d246c90449e883c43bb62e47004. 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/ES64E2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbcb8232effc1689d68db2b61e0e3f62c34b23696a200809397579e92c4bb07. 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/ES64E2343735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67839e04902ac5178c8adf16e72664173390337e82af5bcff9b02a4722dbe7f. 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/ES64E2458711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf753a2b7a1ccc051d655adcc07a3c8dcf04421d6f72a450c584d17934e33514a. 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/ES64E2486226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbcb8232effc1689d68db2b61e0e3f62c34b23696a200809397579e92c4bb07. 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/ES64E2343735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f862553e580d3183b92a4e96a98063331274e264566180101da978e191af3d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES64E2313436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cb091c8dead2230b9e3cd441a289a14d1bcf1dbc078119a80d864fac471a2e. 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/ES64E2306976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b14e2da939264cbc38b3df25362c8dc03609df4972a60ffb9a16d8df394a711. 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/ES64E2302400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511088b655d2a30c13a9dcd45222374891767cd6dabadd654d0caa93a3a6f200. 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/ES64E2300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10e8a26767a009d06f3d274ff1ecbc2c856a7e0d35db4b0728f01d5f93bb2ef. 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/ES64E2205625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda01b7ee0a03c1f3cc17fd102df1b0e09d4f4e62fa8e5a64faed9092a484e5cb. 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/ES64E2203115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cc5b2938e17697c2e1f074a3ea70225d0566059b81d649da0b648d177e672b. 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/QZMZ92247321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca2b115e6f5f3ae5a0a7f2e87576f120986d44797dda96665ad40e483880a9. 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/ES64E2201336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fe91201bb479acb7c5fbd12e502b9287d7678a883ff587b614b0527848fa19. 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/ES65E2100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d86331b0a73330d3ac833197b67a70e3b98d246c90449e883c43bb62e47004. 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/ES64E2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20289db5f0186ed108f9e98c67079f44e0823eef16533a85fa14e6df6468b91. 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/ES64E2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ce14559b75a806293f5f88ebcb0f8b9f3f960dc274caabf5a84e874bd6ae1. 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/QMFMF2107155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbff5e4cd7463e1b4100111cc76468352e374907bc9a94bb642647b28383a9df. 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/QMFME2185008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb48892bc06bf3264d569b5b2fd39c72808c8057d3fb1d6b213d9467478f920d. 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/QMBZ92193463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0427637e80ef9a789a7c26420e58840705c407ff98b423775e1196df4762c63d. 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/QM6N22119601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fa7728876bfcb17dd0843eb646a47c69606bfe160beda310ce739097954ec7. 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/QZFZ52177259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b1ae4674f923394866d344f9d11104c598c54291fde738f71db616580809b. 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/US7VG2247882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb93ff236c50eae8a91e23c35a308d0cfc36064945ca897a1020f3614edfc35d. 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/QZFZ32099535.