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 0xf709599c60e6ca7961dd60217823ddfff2f670313f34bcd036e094adbefca9f5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e12a450d-662e-4412-9cec-5eaa348879ab.json and https://artists.proofprofile.net/proofs/artist/e12a450d-662e-4412-9cec-5eaa348879ab.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 0x28d5c613b2914c48032b74b1cac29f88d429951625bd76012244447bbc91e200. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CA5KR2519731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7710b91f99ef95148dee794b357ae78555a513f4d73e2ff60d18d482f43b8cb4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CA5KR2519733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c93b9b22297291bbff3369ed7c33e93a53add3efd86e043d8c4d0a743720a87. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:38Z), 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/CA5KR2519734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f0abb56b51bafbc86f9ffb0dad875310b7afaa8b3d464a1e80f3421ebfdda4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2519735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d4897b618c24cf961ccd619fc24b828b810d227f253190651c493a64b1209d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2529385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb645fc803fc09018c0b12d2edec5daad5f1c996244cea4b6ea0e17b8a6996b8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CA5KR2532504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18da1bef27dcb519c56d3e68f95658147a522d6a4ef6884e83a570ee46377779. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/CA5KR2533912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdd9ae2568e86ebf4fa624334b70c9a0195c964cf5b5441782290ee3433f02d. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/CA5KR2533914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de9d0b43b1976f7d1a332f03e824bb7e77c043dbff0d37dfad17f9160cf9ec6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CA5KR2530604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5883088cc0dabbffe76fae3a2caba25e8f9e8e662ea890dbffa4f0ffcf703613. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CA5KR2534576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8db59c43696aabc9d91ff340d321fc64b01cf18b4d461764044bb2504fb0c5. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/CA5KR2543118.
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