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 0x39947a640270fd4bbeeebafb71e7607c0666d3b68e69c40f9b245c5f703a6968. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff26eba0-34c8-40d2-ba9f-a527ef987090.json and https://artists.proofprofile.net/proofs/artist/ff26eba0-34c8-40d2-ba9f-a527ef987090.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 0xf6667b0e4eaf11d1455ee5c35541d5deb324b82ee99e42b9f0395b4418decc79. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBSMU6573656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3bd26ab9794ab714f3471ff51bbe829ef2e0668b7fedd9b9fa5cf74a65d035. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBSMU6573658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa369b57954e4afcd4bc7b2db3c1ef5e584612499de713ba9192d2556f4a86377. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU7082155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532921123fbe79e1562011fd3b79fe2fce370412f9e5718d1295ca1c9b3ec80. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:11Z), 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/GBSMU7082157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f4f39785c8bf943f881a773aa553e0f25417e13de342d01d8bc01df9722acb. 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/GBSMU7091746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038447b62f5a79b7fa8f52896fe8ae867cc9a46844831b7f5e8e4e222e8dfd1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:49Z), 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/GBSMU7091747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ec53fcd193c303a99c697467655adc44208ffe0b588135d3a5bc5affa97f4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU7091748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbe9e2c51128589881bce9f1a9a1ef596c06892018b32602a900888f9faa258. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:51:57Z), 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/QZAKB2007929.