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 0x2b4bb3d1b917709bb01e653da6e13bcfac7c3f14681d8feaa5b06c86d94bbc93. 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/e1a1b658-5ba6-4e43-8255-7cf7ecef1c07.json and https://artists.proofprofile.net/proofs/artist/e1a1b658-5ba6-4e43-8255-7cf7ecef1c07.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 0xcd97f7fb31f68fc860d8e8a59be4d3f20a7bcdaf9862aacfb7f578c4aac34de4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:32Z), 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/QZTAT2376297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc2e3e67ea791c8cff0d6661a8445e1233495d307ff48ea9cedd0cdbf90514. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB22301394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf4b02d4c6722265c1a517ee5c1132e18c19d4a01a742cb058aeb3dcc8204d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN82463366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242f98926d4d9bfb81b694ddcfd8e40351c34cff42f21bb6e9ce0c4cc5637e76. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZFYY2598304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d103a3b38efda47fa675b418b392fe4b01d6c582c76837d320a25e14a92c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFYY2598305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7928f7164a5b7ac8d627314e13d80bfe397954edf8f89e91875c58cf21b51a98. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZFYY2598306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b253fe1a98d06f114931e20b66047f5b8674ad20471a4d2de4c638f8c7349e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:49:00Z), 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/QZFYY2598307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6611c23ac53a1b0319f9dc446dd081cf1c9484b967dc525b5ad196b420b3791e. 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/QZFYY2598309.