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 0x18489a2bc4d6f481320bbf6dd5a38261772754108e07227823c11c12a5983272. 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/a7bf7d1a-1a8e-49a3-b483-3e3c67379256.json and https://artists.proofprofile.net/proofs/artist/a7bf7d1a-1a8e-49a3-b483-3e3c67379256.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 0x2243bb9618ad7abc2da36b74e720aec89ed33f86847c9ee0083d6cb61c8f8e5a. 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/TCACH1527275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c4b14d3492278609ee1a3427308529998731d2bee8a1abf4c16e478baaa8a6. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/TCACH1527278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a464b82816ca112607dbdda736c5959af32e7861d727dceb3fe64349b64ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACS1605301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7eabb5cbc4bb2aa250b85610c249f2a7d34fe771ccbf9326252b31b34e0f79. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:53:36Z), 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/TCACS1605311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a402e2b1372b56e5ac4420b0457c1d438f827c1600e11605864b6f89bc3fa0b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCADL1822274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d96ca06573913b8f4e7efc2f073a854643d93ae5bf9d6a401ae865e67d30d7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADL1822281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f84fa3cb1c9355f7adb8843205c0ad0bfec3a4231507669dc3f4ced13a8892. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCADL1822284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca21c421c11dd7d48c643f563c6109a2af0e9657faa486c316f69833a38c9c. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/TCAFP2108501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914c3b097d7f7c584f72571a8eff81a8f579f4d01590e2be92174e4e6a4d5424. 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/TCAFP2108508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3134baf0fa96909feb0c19ce4205cdfedd0c3637bd9f9ae760841dcc94f24d. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/TCAFP2108512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e87e3ff93c339ce94eeef7a757ecafedb2c4dca358a1d6f0dbbecc9551c273b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAFP2108520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f996829ed34968daa77bd4d182887b5fd49947056b5d7b6c0c8b3b8103e223. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFP2108526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28121752ee0ad7715dfd21c216b933092b1c50432c5a147c0d6ae2475926fec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFP2108533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b6bca7862b877173e8abc9d5935655f3d8dfa05bd3d36cc4684873621ec6f. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:15Z), 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/TCAHM2319035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a116fe26cee4b73884e7f04de70fa81b8f2583df38c0860308ac6513dfab39. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAHM2319043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fd71e923241923989b410f544102c9e8520ef4b17d82c8e0f62b423384070. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:20Z), 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/TCAHM2319054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c98a9ce1916bbb621312175d1c3b9e657b7db00690e6eecfb01944e0a33d63b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:00Z), 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/TCAHM2319076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca82ef641e694001417e56aab1cae11604cae43efe43b685879159703f035130. 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/TCAHM2319089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d96d84ccaee74a50aea3a1021ec02937763b2721cbface103724bb4e006940. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJU2586319.