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 0xb0a64a5668d788214ba40027c1bac6f7cde685d99d810312e7982e1099220b19. 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/bb4b9313-16d5-471c-b125-41a6ad50cfec.json and https://artists.proofprofile.net/proofs/artist/bb4b9313-16d5-471c-b125-41a6ad50cfec.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 0xa73c52ab798a4d6375562cb208a9f5a56f8a9edeb079832d5481077be58227d0. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX5MX2325730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2902ee66098be609b717448a7ea719de5bac5af34e358b854bb531ac7db48e3f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GX5MX2347389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f3ecd0602a11718c2bd1d33b237b4c753cfd1bc58658fffff3f1b8ff6c3f85. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX5MX2384725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c0c341e52e4029fe5aa494bdded79d00ce58464c5455a0490741a42269388f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GX5MX2360999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4311308f2ef769b32e568942059648c3988e935a422bf177c108ad74e876595e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:38Z), 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/GX5MX2340621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1332fff07a4c73cf1880ee75f55523bee2509ac2c51fcf62e3d2f3aef4b76c46. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX5MX2358259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d0e66a4b911e14160278c49e8a7a2da01b120a743f24c618a629a9c605cc33. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX5MX2322719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff3f63194df741d474c8b1a8633a6c33ab448548ed0b75f1a5273b1e4a50f3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:39:43Z), 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/GX5MX2330743.