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 0x8b42a9d2df5fc10419a00f7f5041a8dc507970fe0ad5ec2355e4b348810ca5c1. 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/d359c10f-c8bb-4f40-bfc9-f227b93985e3.json and https://artists.proofprofile.net/proofs/artist/d359c10f-c8bb-4f40-bfc9-f227b93985e3.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 0x27a9afc4ff7846276053fe6d1fb5ff26d191911e4f673b09ba1cbdb41b55c124. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAEE1991026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa87ad81ae7196057b0d79ae7f02e609bda5ba72b78b357f3d2b1fc34b3f0386. 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/TCAEE1991028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e3911b45f08794fdbf7fd393dd61c46d93a2134c88ef2f843192854a7d9b2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:49:48Z), 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/TCAEG1918628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da42fb07b994d63840909826a1b645457f227276dfb8a96d4e0f32b2fdc0423. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:48Z), 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/TCAEG1918633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf85813324348c24ad5300a5dea5dcf2d935bf51bafb7491c7a58c0d70db6ba. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:04:59Z), 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/TCAEI1928892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bc9c10469dfcd5b01b5df26d11692f56c1b61a4aece379cb6660bb40d01253. 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/TCAEI1928893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83f0e2bf3e31ed8b177ca6e5c616d2293dd96bfc2bb58125d43de9916188d4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZES82059022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4257f97e56d245ea7ff2e46b96190b05e81411b77b6a1503badfe8b5b975ae4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES82059023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101416c79f7fe193b56abc4e175b720141365d8f90e8c09cb5a265eb118cfa89. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZES82059024.