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 0x870b4cac02f8a515711e90b128cec72f62bc3a142b45b07c99ebf29ac023a352. 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/3e20c048-e53b-44a2-84bc-31f81f0aa77d.json and https://artists.proofprofile.net/proofs/artist/3e20c048-e53b-44a2-84bc-31f81f0aa77d.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 0xa631ed36dd96ce9354313421cc68a41de513841a646fbe32783301dc9e0d18cc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA61858017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86c7ad6c23728568c30da86377887d15866e8f301f7e5c9f1e4bf69e711f526. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA61858019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde79e4200ef5395c375ba3b112d5fff3657f4de801ccfb7884088614bd7feaa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA61858020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc970083b4b07f55878029075561c750d1ce8044c7cf3ba118b70cd8ceee01fca. 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/QZDA61858022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5700667fe05a7e5084d4c4db62eaf5d83cbbf1f51b2a10b7478130e5a674ba59. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA61858023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d1938e99dab7f51b588125cc20d2b874e4aaf4409d4d995ce785fbcc2a7406. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:57Z), 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/QZDA61874279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ca508ef602f6e0e1266d599492f3753ca85f5f0644ad5ed52d002d0b04dbee. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:31:00Z), 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/QZDA61874280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e4d5953566a8b09fa60069cce121cc59cb65fdc14554bfa6b0de525d2629e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA61874282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3f1e8d3d8dc114ca21f2b33c690a4a75f97c775aaae350659c5239cfa65717. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZDA61874290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88204064014bd39b1de6d8adb8cde8c97ed7bedb40a812c683feb2b36ac74fdf. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/UST8K1827658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a34e0981604dfca0e75600a05eb61b67c4177f41be035a84d7a2a33edbc5a9. 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/UST8K1827659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce47c8d64bd38948212932421cfee2f9c49bb87377edb2587430f86b385c13d. 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/UST8K1827660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b11eedfce4d13d568a4a481ec17af0c50f7632fa5b5a33afaff868d74cc0c. 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/UST8K1827662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b52b5c2146aa5ca56cf29a7ec58a987fba458c1a5d57e2b08f097500260b009. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UST8K1827666.