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 0x5fadec5f18603aa85e8da71572dc2819c98d5cef67c834a95df0095da1f8e302. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ebee4e0-55a0-4c47-94ce-177bcae9f496.json and https://artists.proofprofile.net/proofs/artist/5ebee4e0-55a0-4c47-94ce-177bcae9f496.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 0x95c9d773ad46522f625cd35b17d11e4c534c4427cd80a3cc98b8212a86b1457e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXD7G2545103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6106920b448272469d7645bc4c88396e2128abff5644b5dcdded9ee11db21f98. 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/GXD7G2506579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70912a33f6d91fc55603a51d7e589e669ca5203026a32610769c7e18e87c69. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:16:30Z), 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/SGW502536719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b316c2b50d807d5312206c9a29eeb401f4c7f81ab01e058ecbe0223be382fa5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SGW502541528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06392c6ddeeb5119ecb11d6728c1339b3202f5f5fad7b324d012b753f4cafe5f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SGW502536405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249b9e0020bd4bd2c374adbf7e903b90b0a3ebe4de8e405a5815d99bf7152576. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:42Z), 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/SGW502575382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf669261849f50658be6407d635050faf3b03e7efc653386b3979f80b6a6dc7df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SGW502523492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28602a6d39fd98e25a0a1764fc526949a1b82c65e4fd07cf5c9c7559b804e816. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/SGW502536637.