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 0xaf8a171f3ee2f84d052d596c967a36dacc507650f9e2068161d04cac976f9fad. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/439064e7-67fb-4964-a791-b01eb1dd59af.json and https://artists.proofprofile.net/proofs/artist/439064e7-67fb-4964-a791-b01eb1dd59af.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 0xc888d28f5e88416660dfa9e84eea58709c52a0cb516241648601a95e27d59d52. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEH742510627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6767adec535ee5ccfe781f3802ec526e2073e125814cd4b6b267d680bd82e27. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:14Z), 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/DEH742510628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09a23a87d91c5775ac3ef2a0b7fddd5410de03e117be412d479c04a617998f5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEH742510629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91397d930ae864c5d27f2f78c6c1d0b782b0e9c940dd7c0a8623a6a4d8df6dc4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEH742510630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b192793bba4899ed0893854dc563350ff08d111326c6f0bc8c28b24f6ae341b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEH742510631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ac7d51fedcc03af7952e678e4271efae515eab81f015bd7e2488dcdb2ce2ae. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEH742510632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f03a8aa0f6df80eb70e12ce5467b0ec988232f1750851b6b9f55fa07b1374d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEH742510633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167ffbfcb116e10aa385a43e743880de1d8e994b4ec9a854007cd3511398a6e. 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/DEH742510634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d3b1749c55d0a55b8a75aed1541d8632dec4fa6bcc99ab61e2f2288687b357. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEH742510635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282bea72d4183df6a4010c306115a644d7773de404e1775bede276ad40cb0d0c. 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/DEH742510636.