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 0x054918360b433bec529de2f18af0cd140d026eb3d0f4700c28356603b9ce1a8e. 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/b01ac95d-e8f1-430d-aa46-591763a48446.json and https://artists.proofprofile.net/proofs/artist/b01ac95d-e8f1-430d-aa46-591763a48446.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 0x738a9b79b7349826ded004672995cb07e2200559e79c9918c66232f3f1f2ccd4. 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/USUYG1588847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98eaccad37d09d681327275b398082030de11ca98fe277fb06472e7d4ad4666. 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/USUYG1588846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ec73bf18d4bbbd9b0da98f5aa194bfc4fd5382f0b3599f14bea532c1fc5895. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:10Z), 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/USUYG1588842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddf3cf91ace119241f51e6b1331c1e16896e2050744ffaec433d1e445a7d3e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USUYG1588843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075fe2e358bdceba5b161bcede7a2235389f8d6a6dbc05116e2dcf90be536ae7. 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/USUYG1588844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd907c1f515524918a06c84f390adf612cb4903ebcd48c28723f821b5f7d83. 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/USUYG1588851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa501d04652b00a3500d7413499bef7fbd18da668d0c2aba61488b738d0203e12. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:11Z), 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/USUYG1588850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3710c327fdf940d25e277c351858609d88a17f89361c46e73be0d1f90d0f949. 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/USUYG1588848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e3252d46ef4b6a5bb04ed7b47586886396296984c234df6624b74fa141f19. 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/USUYG1588845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a6fc5e1bbcbc396c2d59dffc89c9fea1cc91c8636ea67ead28967122eef18. 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/USUYG1588849.