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 0x0500d6b88f47c2102ccb878b7bb122ed12e1cc5b9e3a8cef297d69948a56e4e4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caaf7ef5-e28f-448b-aa6a-8b20b838dbf8.json and https://artists.proofprofile.net/proofs/artist/caaf7ef5-e28f-448b-aa6a-8b20b838dbf8.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 0x8cfc5224eecb4f255c73fa429bebce9c581bbe17d5eb5b1398b6eebbb2653386. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ62454512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8855d823bb7d5d5c0996f4b133b96dc6dba245ebcb664f3b8da0b292b1e8807. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNWZ2415778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf344efc03960392fd09442a00a106dd0be6b33a244b45600f56b8c2571e3374. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTB72424673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53357b6371283250e525ea9d7017f76fb213a174de4020046e52a46e35cf9509. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFN2434204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968a4f9f27c9ac2ec7a70a4787ea41f1949f2f251fb825e91d2984d33d64a2df. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZZ762472873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3847146d752bb6f275e55a40eeb9535c878bc6466cba9ea7b7e1f6dd9bd228a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3EY2469547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66b516007e80ce667bb3b88e0511a99076bed04d7a2d3655aa052f2548424d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA42540812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199bcdc75a637a00d083bb6c6e4d7003f0c84efaf4b544f033dbb5de39febd0. 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/QZES92528766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e4066647c52c50d060aed9e22bb1bf5f74e63b6fa9efabd37c3325a173b9d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2566736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bee60d565b136cba8a48e89003c4a8176055a0b4e499e8d9583e9e610e06b1. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:58:01Z), 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/QZZ792544687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a85b23543cb33668746cda6794e51854d6fb2700984bf87f3ae4ce99565acd5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:36:43Z), 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/QT3FB2567082.