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 0x188e49f1def07cc730a72cdf00a1f2010c981336e8e8030b232c34fcb4972f49. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dddd9f88-87cd-4395-9ee8-f21269fc1449.json and https://artists.proofprofile.net/proofs/artist/dddd9f88-87cd-4395-9ee8-f21269fc1449.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 0xeb5deebd0a3f616e740f7279eeab23e59df88c4317c391285fcf980c6bcce191. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:47:59Z), 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/GXH2J2586767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7336f9360df270265e628ff9ddca00ec58e3b424aaff29fb4511072ba979634. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GXH2J2586691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb18715cb1fca0222d177fd598b3c267fe2b3e8e63d743e7f90ce395e62968b1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:32:38Z), 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/GXH2J2586768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58edd8ef5ae3ef645d908f4e7e80ae0a0be3d637e5f60954d5d7a8d2dd370652. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXH2J2587446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27677363020bcd236216f20184535bce69ebc16383107453db804352745f8d2e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GXH2J2586662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643f5c71843123c7acdd9924ecc8a8e45e0d06fd8487e4011bfdd98762ab957. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GXH2J2586762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da9a412bd19822730c6e5d320a97f83222beae83ba20dca6cfb81cd809d5c6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GXH2J2586661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe952523fc7ac17d2245a69b65576f6c61c517d3d907211e053e28e09a75677c4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GXH2J2587447.