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 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 0xce2a55c512012a07b8e3f8be59cdf8931d30e728f89b27aa3cfbf40ee9004e21. 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/3be038ac-1444-4d7f-a309-eaa67070ea75.json and https://artists.proofprofile.net/proofs/artist/3be038ac-1444-4d7f-a309-eaa67070ea75.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 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 0xb6ba36d8de0db852d5729be782e3bd8694462e7dcdcb08bfeb150bef460ab637. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:08Z), 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/JPU901701494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19500c09bdc18b4eaf4f11393cf0a24f1f2c651fc3c959d4012cc3797be96a3a. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/JPU901702866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c87170f11a9f41974f773b4b5f4082e36e9c2f7d8818b8f32d848a73db87cd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPU901800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d69fde0acbc8c71bdbc2635918bbb126333dfd2cfcf922f1d05ced35ebfe29. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPU901800256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af9d599a3cfc58f58b0b67b5215448adecffc51653e3b3de83f2a5ffb053d4b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/JPE871702155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842008c618c05f9f0bb76af766a4f17b631cfabe338a9bf251e4adbec29af6dc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPU901802105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7b111be29d8144c1697b434e6d0a64015fec8df2ffbed06a79a08dd4039314. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/JPU901802779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316c92aac2957af77c46a700c3838d2c3ac8ff217604d9106112498770ec0900. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPU901903490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c54ef985e5de5a47d58ed91a19fb7da9839cd38b24726fb6f115ac5116de3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPU901903491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7951bb718ee1e496e7f704a77b48b536755343ea438e095167b25ff7a64a159. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPU901903493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b40ff5bf80e645ac34b5583eb12a6ab3389a48bafd9865e7d0bd6af3fd51d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:52Z), 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/JPU901901738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be276fecad5bdbe33819b9496e94941be6a15cccae1b90a1ea5afddcd21c11e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:57Z), 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/JPU901903497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3776ee741b6a7a4e5b29f5d6e7cf50d68cc864187c836f0ec0e9eba3a0a1a483. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPU902002266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406dd20becc96be687d6d20e9c26ad34564acf495d946021054be457e879265c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPU902101677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040698c2001b8c57572eb322a80ca54258399a3d27d596431050012527ec08c. 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/JPU902101852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c2b71857d6697574b7bc9144f86c9dd8c48381456b02457026bc3ec7d8ea66. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPU902202050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025b00ee65f52cd8bbae8eee4acd34f675a5818fd1cc3d0e16666002caa76d1a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPU902202053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4181476a26d8617ef976e3baab091faf48a64ebf4d031db6113f0e98ffbfb27. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/JPU902204379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b38f14fd16f367331153982cccdd277fbbdbf465bc392d83a00cfba8268fb. 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/JPU902204380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba324f516f8b05bf1cfe0405bc89175adc0700e370519358182b00003c2a998f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/JPU902300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a39e6422893bde75e386381806205a4907e81ff1520e06f29feebb062ebaa0. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:43Z), 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/JPU902302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d6466b690500482616887c812fd76ac678ea92c9de7c54194ebd59fd05e1e5. 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/JPPO01707136.