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 0xff958050d0ed9a43a50b7c4ba6b52c2742861107705c618a1189c03314692696. 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/02b6333a-bd00-4676-9ba7-e8c69c2dfb93.json and https://artists.proofprofile.net/proofs/artist/02b6333a-bd00-4676-9ba7-e8c69c2dfb93.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 0x64beb4513410ae6b96d8a4dae9a9a0d10191bff1cc8c22d39754007040706a06. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBSMU9663034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e2198432dd955bd6acd2e0ff45bb02f94f4c8218a0b3b166e5a6b060a8324. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GBSMU9663035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a83e8a0f38870d204b50cd4921f1ce77ebaa5e4aa6007ce61ac50e38b334b. 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/GBSMU9663037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54627654e17a360d73c93aa5bd2bd7a18fe55c5465238a0816c0e91b81753406. 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/ARIWK2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xececd1926195633ff444acfcc3fe670c43946d71db5cfd0929d6baf7df9987db. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARIWK2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9570c4d4b191c3023cf70a9e41856437048afca63498cbca44104021c9595275. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9L2254664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad783d5b70fb5c92d985438fab709f21e22eeb9ed4be84b1620fc0b92c9ccdb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:57Z), 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/PENMS2302207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7166999bc1a89f87dc4f6b71113ec9c2ca6317bd19dfab52f51a351ca0dd78f. 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/QZPJ32341551.