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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ee5b7b19a27e71de9298c6721ca065746b5c1a7bfd49af217e9879c884687. 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/8c1485df-bc6d-4d21-8475-b990317b7664.json and https://artists.proofprofile.net/proofs/artist/8c1485df-bc6d-4d21-8475-b990317b7664.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b592e52e7c61dcaa9bb26a39ec69537eb30259b92f82ffb89bc9eb716659e52. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/IL1380602573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bc5a7b3264563b1ccb07880b43d2957c4196354460ae230f3e4551acbaf196. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/IL1380602590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d86d2bb71ddb3da28088235e0975867b21b599be52a621c5ae82cf16fc4a8. 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/IL1380602606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01256b9c21c3add0622e9fbcf552d1e9d027aa204f9c053ce09cd6b3ce96f7e8. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/IL1380602619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422a404bd461994558423d61d52590b86f4bfb04dca80398a00d4f6186721787. 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/IL1380602633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ffae38d9f231d2702f9579bed5e202b9751230ffae4413b4b663c29d276ea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1380602634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae433d6204eef310adcae3540a5fd680186688af1fa305d1fae214ac254351f3. 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/IL1380602635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd5dc14197fc7782c942eac46dcd00187f0ded735f0887f3db91cf44f4c2a2a. 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/IL1380602638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06992942892d5e24a34e87d051549f4d37b181b6d80e5d5e81e12ffeff0859. 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/IL1380602639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff66cf334a65607cf76deea4cfb529461db9c918d8ddc7bd92c7da65cd375a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL1380602642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f566100ad323d8599163e0544254172fc477af85ddb29bcd0ce65dc904c883. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/IL1380602666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e4b7e936b1fe870d201f6f3f814bd13ce69984ff82fbbd434b8c389d236224. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1380602665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c80e04bfdcd54ceebec1ed0242c63fe371bc996e6ed95e8a07caeaa748b30a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/IL1380602680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a42f6a6337d8174ca3dd49faa205eb294ad94e9988367ea9ce17cfac4e70cb0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL1380602681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85babc9c36069fc578f8ddeb9d584b5c174a8a542b14fc57fa149a0684dded79. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1380602682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca12ba100689b3542ad91934f0d38d34e517ef8204f457fa58297d75abf7b6. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/IL1380602690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74fe37ee79191fba920a204b3d60dd5aa6df293f67cbd79d51207600b45d165. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/IL1380602707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e47a56e1eaddf76bf6680d3e9d45b4148a07a50249e3e39ab2013bb756063aa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/IL5821500910.