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 0x6089fbc727d9fa966c2de2acdcf4b4fe418ed3b2f138250a5feb6e1ef25c04b7. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc7142b2-3c1a-480e-8b00-620f71618673.json and https://artists.proofprofile.net/proofs/artist/cc7142b2-3c1a-480e-8b00-620f71618673.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 0x5fe24baeabe1032aa7e6de9ed2cee8969924b9eeda0b5e109d4e071fcd3dceac. 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/DEH741641360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae1cb1c44911c4624bee9ea3ffdd84b34a32619316bc61422db1071075c5821. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEH741641361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b99c4431a0e1873360391512c345814db013329638542c35bfe2878503728f4. 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/DEH741641362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1e500fedafae5b7e576918d2162f2f023aaaa98c554998e02523177a28aa4f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:38Z), 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/DEH741641363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8497c23323cb0326bb5a2d5974f06e074560c96e31e920a4cfc28f2fca4094. 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/DEH741716141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6a706d61473cd683f67bf343c243b83c6b41517b47373be892ba65c954b586. 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/DEH741716144.
Subset & Schulz Audio - Exclusive Split Work
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477028c6df430d69e1c7d0381b4aa7481d5e5358c27e02658914ae5158a91f43. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CH6541670807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a4e21bb5fd91abdc91e7b170f1462dad0b6c14eab06fbbbc93c8199dc58ac5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:20Z), 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/LTE232200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f2989029b176b00e8a7fb7b1859970f4aac4429f51d2c7f23474352ec4627d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEH742032190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2674f51c9b0f0246865e98d57256166a4f27649941c57c825e6169b52ee944c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6542223217.