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 0xd26cce9984611a5dce3b7be6a044f52d5ea6b3083f56bf959457500d57081869. 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/0f2420ba-71f2-47ce-8174-84eb3dd7ef0f.json and https://artists.proofprofile.net/proofs/artist/0f2420ba-71f2-47ce-8174-84eb3dd7ef0f.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 0x287e32cdefc4a346e87248148d99bbf8a2c2c9c7440f8cdf296fb71e7358e1f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6P2567471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b3783869c732b1f57cb3664eb6c7c234ba5bb1e3a2e687be6ac4d267ba5791. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:26Z), 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/QZK6N2598206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7364cfc9decb49cb6d123e2f7b0d2c46b10aca5fbe476eb12c8f1b24acd51f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6M2525564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534d217b4a4de05eb756a417a081d91348e987875453b6585e2a4c3207547966. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWR2509184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71895612f280a8af381ab83adac5cb32158cac6d21381a980b60773a52523510. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFV2592832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3674724f3ac0ca8f151e90aa0e9407f63b0cc7953a93a1ab40f291fe10c80a71. 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/QZZ7S2593662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a14a0192445fa5448654376ad08f891d6f0886ba153f7d1645ed7fa263aa14. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7U2590068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14160fa1ee5dc252a5f04053cb3e1b42f6a1c413dd85161e3a95c07a598d4be8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:51Z), 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/QT3FF2513985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6092cf84cd81c03a29e128715b4d1eaf60e7f7801d4d73b53b455c1759dfe051. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT6EA2509568.
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