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 0xe6d805636751bad49b6863be727c9b1b486c035c923f915e22b4c3eb7d0038f2. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cf581b3-7e77-493c-85bf-0e1661f546ff.json and https://artists.proofprofile.net/proofs/artist/8cf581b3-7e77-493c-85bf-0e1661f546ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music of the Decades - Vol. 2, The 1930's
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 0xfa8dbf8f81c44a8a16d85901cec16c51ea9d117e5bc7d94a342557b3dbff794d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLG620462022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf5cdd01d7229296cbe2bd6aaac9492205a2f39f1add8acc9a6dcea69f58dca. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/NLG620462023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba83636957fd8a6d1f427bcfda71e49b1df6f15b66d7bb5e58bf387509574fb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLG620462025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b8790652c7b5abf6fa5ba527c9b4b6b1e2532241b2b8447cd3e9e8c3c514ac. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLG620462029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c17f4eb6c0fe3976747027a60510ad4651419b27cb12f8cc913aa2f341f235. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLG620462033.
Music of the Decades - Vol. 4, The 1950's
Music of the Decades - Vol. 3, The 1940's
Music of the Decades - Vol. 1, The 1920's
Music of the Decades - Vol. 5, The 1960's
Music of the Decades - Vol. 6, The 1970's