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 0xadaecae7c75a20a6a17b78e3865f2812f49ed36dd83b943c825893e2ca38ec43. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d5e73b0-bf27-49ca-8020-76025bc90dea.json and https://artists.proofprofile.net/proofs/artist/6d5e73b0-bf27-49ca-8020-76025bc90dea.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 0x4c09b1de96a5eb875fd8f16d83a8024d1dfbbc51127255a6c1d1fb5158ad6616. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTBD2519734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c867c3c92d189aaeff96eeabaeca90f3a5475cf36052a73c84460050aea67ff. 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/QZWFE2538808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cde81c89887c58252c73dc51127db24a57c2e4e6358039abde2c2bbc755557e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:58Z), 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/QZWFE2538999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a76d84e04d31b135c1ef482857060dd741aea224d45f0d4c60c503c9aa41901. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFE2538835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e3917dcb9d4903894406c14a1d48aa9dc245753f8616b12bdd32b62e0d813. 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/QZWFE2538839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51763edc14117be969e85552842ad9ce62425713e83cb48a36a5d71e91f2c45d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:28:32Z), 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/QZWFE2538889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc45485bd78f39db38b30a13b35f5969a73852d7d08faaa7a8f24d66bf21d304. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFE2538831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c8d0e9bf526f48563711b101c2b926a24bb86938377ea20c94b5709167c2d3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:20Z), 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/QZWFE2536141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c105d997c8e5dd1c4824fa81e46ce0dac7998de994a1bdefc1c8397e150085f. 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/QZWFE2539074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba68ee9dfce816fa6fae493e79db34f29e1f44aeb3422ff4b0f11ec3cc86cce. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZWFE2538811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f122ddf30eee855a5c81a33eeb4991a76eeef9d1f3840f234ed2213dead531f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZWFE2539032.