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 0xd94f960703bffe2199e1c8d1d047f637a7c990310966850eb36548f527d6fc94. 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/884fc592-3902-4382-a153-2b3ea8ef3109.json and https://artists.proofprofile.net/proofs/artist/884fc592-3902-4382-a153-2b3ea8ef3109.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x16fbf5e37c92e4d77a19f377de5413aba03a93a89575150ad521cb21c923acd4. 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/NOH1Y2402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c04a2f4dd958b9c490fb8ab721e60b8a100815c1098ba10960b6eee9c88fe63. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/NOH1Y2402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c43f917d33b0ff2a6fe79f43c5699ae9a0873f4ab78b85826545059e92c7d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NOH1Y2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045c7d097ce30aeeacec01e0399e5bf6b2847b2bc29da3ad14e269ca3c2803bc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:32:18Z), 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/NOH1Y2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90046e5a1a7ff18eff4195e954eab20a6d35b28f1ff5da3d48cd993141cd2a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:06:31Z), 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/NOH1Y2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb30c5ba2e2a5516da18c588fd73c06ab0bb147b4724d527fc90e408cdba13ad. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NOH1Y2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08832104d061c1f17cc9d3413235838ffc598446b2eb74e9e03492b4738214bf. 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/NOH1Y2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0a7eff57568798b3b5475bc9b3a7e21058b1f241ae4c9f315d7a695116f3d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NOH1Y2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57753a182eb6a9bb03ebbc95e57efba94c83e81aa7ec03ddc1aeb291b6957026. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NOH1Y2401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347362690b2d6bb93842586b18c7d8e60ef0f71ea845e9b3f99e7c34e6263e97. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NOH1Y2401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749f9bd6a0363b7b9b4f7750fd4c86098c5aa199f5d5275ba62fe3c024dd6be1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:29Z), 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/NOH1Y2401120.