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 0xc07e8cfef2a4d25f2e626bcb9b09cdc0e7cc016d6b0dd3ffa00db6a898ab51e8. 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/b0e8987c-bdf6-41b9-8e01-4201e153900e.json and https://artists.proofprofile.net/proofs/artist/b0e8987c-bdf6-41b9-8e01-4201e153900e.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 0x9e46872e542a71620e66702190374690286b81d8f4275fe3dcdf72b81ab988aa. 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/DEG932300872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1accc6af896622cd45d6b0e20f4cea7439239e29ed43b52a321fd69477452e. 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/DEG932300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e72b23c31c4d27d928a5635052a0dab3cc8f05733af2ae66f6b197972d656. 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/DEG932300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3307ed8e72f5e713835e3236bd8b738f0e0770fdfc5f3ba4d248b0ca4073cb. 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/DEG932300875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7e2b7589cf800d75991a90c40d680a846421c7236fa4d797417d3d57b7e463. 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/DEG932300876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42389f24e233dc533a39ed7e0493d17772641db2d18b85e182f7845e6f1571e1. 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/DEG932300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec7a60ad7a1f5bc3a7a1dc80ad2d92e627ae760c2929c16f7c47ee5527eb16. 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/DEG932300878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388208454494fb36e1c66b66b14780295ec8d6f2e5912f0e651d94cf305d65ec. 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/DEG932300879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb07beeecef708a797faa4889f19056efaf9b5959318b97bdaae7c15b5042e. 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/DEG932300880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80731dbf6ae73b703f62406fea3fd4f2fc8304ec2896abaaad6f340f2b57e27. 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/DEG932401518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42389f24e233dc533a39ed7e0493d17772641db2d18b85e182f7845e6f1571e1. 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/DEG932300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3307ed8e72f5e713835e3236bd8b738f0e0770fdfc5f3ba4d248b0ca4073cb. 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/DEG932300875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e72b23c31c4d27d928a5635052a0dab3cc8f05733af2ae66f6b197972d656. 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/DEG932300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1accc6af896622cd45d6b0e20f4cea7439239e29ed43b52a321fd69477452e. 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/DEG932300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e72b23c31c4d27d928a5635052a0dab3cc8f05733af2ae66f6b197972d656. 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/DEG932300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1accc6af896622cd45d6b0e20f4cea7439239e29ed43b52a321fd69477452e. 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/DEG932300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1accc6af896622cd45d6b0e20f4cea7439239e29ed43b52a321fd69477452e. 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/DEG932300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6a463580466a5da9f38ae2f45efe80ca945f7af5508983aff732c36a77c08. 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/NLC7F2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57f0e0205eddee88bf7107fc07210af4d4233e859ca00b2ece18464d4191d0b. 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/NLC7F2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e3337264867cc2a8df6ab4247a28cfba7a32721aeaf0c95da4b0f794cfe77f. 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/NLC7F2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e25872bbf3c90c52e55d90800c2923093b7168c842ae39f3f1f2e42b4b6dd2. 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/NLC7F2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3ed3e78f60a965e10f06b6b91a3f5c887217d2d12623bae12941806ac58abf. 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/NLC7F2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4b4b8bb43aff340747b7206dd7c960f5ade229314edf2f961ae77526a04700. 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/NLC7F2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1369fde67a794c60b636ee8aef34f35df2020608db4674a3811dd075f0e90f1. 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/NLC7F2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c09133fd8b23117358e94b70460ab8fbd91e7b632220e1895924661ebcf0d1. 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/NLC7F2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3ed3e78f60a965e10f06b6b91a3f5c887217d2d12623bae12941806ac58abf. 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/NLC7F2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ccce4179c2ab57fef0278ba423d3db7f762242df6769c741de947d2dbcab3e. 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/NLC7F1900051.