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 0xd74267d04f27b81bad7de6c8c9deef6315652418facbaaa900e99366bce99e2a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac1d6e1d-cc00-43b8-8ca0-89a9564843f0.json and https://artists.proofprofile.net/proofs/artist/ac1d6e1d-cc00-43b8-8ca0-89a9564843f0.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 0x212211b75a05988d7023b78956e95e053c27803dcb31b7954193f1bf55085f6e. 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/GXBAV2273129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b97b1889ad2fc75be8da5856f95bdf33f7227895258ea38029469c9ae1ef4. 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/GXBAV2273145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36d193a201f0307b6fd206d9fb5a28dd0881951036444e3882cb7ff50f02ed6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXBAV2273068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12558107d75c9908b46245a9a4d11f0cd2627ea77d3961d6c23e10dc191a4a3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:57:07Z), 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/GXBAV2272989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b6b41aa945bee34154ad0c8fd363d9585e3f364cf4f85058f2fa5e17db693. 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/GXBAV2263597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa377eecdec4a56da2ea4fd6dac0354260ae4115d441457338c99132abedb037a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:47Z), 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/GXBAV2263614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7001cb2c73dbf757bf0efa70d1d4ae63d926c783096f278fc384358cd8725c9a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXBAV2263602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbcbb3febba09774f455976abd492e48c5141c78cc801da148165291da431d9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:33Z), 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/GXBAV2263611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf678199a818cf69486fc1b1faa7a8441b7e428d65878485a51ec3c15d1f3a38. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:01Z), 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/GXBAV2263605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6b4dd77d4e2a53c314c2ef9694d0135b7c7adc4c78370ce8a64562cf0da4e8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GXBAV2263652.