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 0x51407d8be28181546b87e9e06be24a2f4d1f7bcb1c54bf84595bb48874d58e30. 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/3198d3b9-1dbc-4bc8-8768-4925e0d40e32.json and https://artists.proofprofile.net/proofs/artist/3198d3b9-1dbc-4bc8-8768-4925e0d40e32.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 0xd21860d266fe623b8bdc6354ac8a3e24032541215eae0e6f4ab1eaa0e67bdedc. 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/TCAEY2028117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6f5ed21c1c14effe9171cf9b82871370c2cfefb07dc7553dc550eae33af2d. 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/QZDA72483941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34266f8db695166f21fbf2c2b75b21bc9b0b25c35c5060d9022d67c2c2ca6c9. 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/QZDA82413404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3b2962c65b6edd251124874fd6153fa729f8a93f714b9d5985eb70ab17319. 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/QZTAU2357550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bf7adb13b77e75a35a2fa00855bc4f0fbed9af0dc6ea92997946d87cf41734. 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/USLZJ2177946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de87aab1ff8396fb318b9db8b0ff8f710333d892d3ff6f04b8db1fbf544e4f. 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/USLZJ2177949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6149e47ac0ff29d10b9ee734bdbad3f7d44663355fdec33048a77ad4b7b6a55. 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/USLZJ2177954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30380ca2208302146ffd36a3cc4911cf731880b6afac970458edb3cb8e946de6. 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/USLZJ2177955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b2de5b6013a9fe9de6c0bbd1f8da11da69f469a628c257dbbd33f8600e932. 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/USLZJ2177957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a60218b454d923627967667671d3ed204eccf6c409bea7360b0f51cfb21200. 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/USLZJ2177958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463d04f2ffeb8aba8a4e637bf81f915850509aa7787ef8ca8d3916e34884ce92. 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/USLZJ2177959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b769556bed977c25549e0e99c9b4199c9b0e0a9b7a330d324e46e39a7e0509. 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/USLZJ2177961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2936994ea2def02c54557b93984dfe4fd6572b9bb6c5e20a947e9b646bb69e9e. 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/USLZJ2177962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9c558eca7c130a9b82b3dfb26c7ffe4fc6caab265b40aa2fe2ddd8de5721d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2177964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1f5d8ca6dcf4d6d857d29727966244ad3e4473e5c4a8c96c4843558ac5bdb. 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/USLZJ2177965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84ee66225160dc17b7ea6beaca5c1c599d2f46dd868b289ebfd4fe2b81403fe. 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/USLZJ2177966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd137a36d3d473900260e9d9a30260402e55ce22cbf5747d126c7aab0e9fd397b. 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/USLZJ2177968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a584a83f94b9e16ebe08a1af5e94f7c32825c1d32ef54b2cf1d7ee750a22a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTBF2397215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e774f0fc3dc8c66d4a620440022bc81939287ab202ae11493e6959375e424a0. 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/QZQAY2349306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2e102173eb0a9ed1358d9d093f13acf1a89b4e4a0b4a51bc6808d1902ac7b9. 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/QZWV32422834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df1ddbcf612e1b6f7fa8e7651bd486312122a111fc59ac5705c74da98231b9b. 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/QZNWZ2488246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf722ec937aa4e77814f14e0d37e1bc991c053e23f83ebfc75f9725edef6806ca. 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/QZQ4X2400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67a5b2037cf065f65d9ca85348f99c9d1d82089dbe06375c19d458aaf25d46a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQ4X2500123.