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 0xd483054a23363403d799426834a861f289b2dfb4edf4ea69f80d1cf4d536095d. 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/5a555382-c129-4ad0-b06d-b9502c7fcfae.json and https://artists.proofprofile.net/proofs/artist/5a555382-c129-4ad0-b06d-b9502c7fcfae.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 0x7d94bfe3f7dfc4fc399705e161638769b0cb1d5f3e2b08c7b0415758d6970c04. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:32Z), 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/GBJX32025005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9203d42517a7cfca1d866bf3b0f439276b6df92e9bea8290f84adff77617056d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:57Z), 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/QZLBC2303588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf5de58bd19ecd3eeedc66254d4d529f41010d4c0a5ca480784945e14ca574. 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/QZFZ22449697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc6f15d7e0c27f982e5bddad61c5160aadfd86ed2d3b1011d729dce0b72b2a5. 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/QZTB52309497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5beef284a96aed4cb808d7917bcae86fdbe5552d395cbf1dda82628174773ea. 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/QZFYY2436693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bd4a1ab7414dcd8456d70e8701afcc7791dc9409cd8711474dffac5268d4c4. 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/QZNWR2423691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd94d29749309bfcab2fcabc589100416828d62f9f4c03288b6c63d4b2beadf. 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/QZNWW2449125.