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 0x565e645d9f89b95d5d6bc05ec2e9e6f36e05dee97549d8dd4038f7a979c9731f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bca571c-92ea-4799-8990-09ee9aad542f.json and https://artists.proofprofile.net/proofs/artist/6bca571c-92ea-4799-8990-09ee9aad542f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf70b7ee8f7e3f6e3eabe4bc76234c3f1ff8021a78fdbd493a083627b49a5ecb6. 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/QZHNC2098119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceff0592678e4a27b815a16add0de660bf70a25ff88242184dd68b3c1b42e6f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA42458661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11e235484d17eb3cdceb3a74440e49a7d69eb81e4e982e8f746f2564f115733. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTAX2447388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32305983a7823bae6c44f79d57a3f6677c424de5631041c35b94d88fe5f1072a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTAX2447389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc3246e8878237a82b8c02207f9dfec3623c09f01b953edb294f15f2e2fbcff. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNWQ2435882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98bfe823f9f86e2bfa367089b82183ab780968d2a717011836ff4b10a38c7a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAX2447390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa197cf342d13fa772c2b8572494f43a7a2ddf9f63d253ab17ebafe6f59fa5041. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6N2492420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5671308116cc5f48f18a13209a12e9807db9c2561cdd0cccff5fba00cc19649b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:09:27Z), 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/QZDA82562773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c371d1105bccad97a5e06a4da47d79c1f901bb9e47e4c3de3e072be00778f9e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWQ2572899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5671308116cc5f48f18a13209a12e9807db9c2561cdd0cccff5fba00cc19649b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA82562773.