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 0x09e55b7cfd1241f05d2627e0c5b1ccd792edad8dee782750ed56fcc7c8a922df. 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/f0054710-895b-4465-89a6-36270e5d2e81.json and https://artists.proofprofile.net/proofs/artist/f0054710-895b-4465-89a6-36270e5d2e81.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 0x7d90dd5286b9899150aa8f939a70fd5cc230b948773394b45864393fd550f67f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:25:30Z), 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/ES6009400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e8cfb71a27bcb44e778620f0e5970c1e84afc9adee9798f4793e513402596. 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/ES6009400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54f279f8e44e4b9580755d01eb49679817e2dfb668baecd7e1bd7121655493c. 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/ES6009400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd431fe7d05dbc4a59365adc568258648e1bf04cedf754ee7d4d661bffee0ab0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES6009400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfedf2d125064eb3af9038c80d749b2b0a08eb3c11b8030a4edb466809d43ca0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:04Z), 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/ES6009400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fadadb53a623f6a30d6151b3a2c60b6acedfc821bd3b873432dfa30f1508673. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ES6009400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e8cfb71a27bcb44e778620f0e5970c1e84afc9adee9798f4793e513402596. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:21Z), 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/ES6009400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0a98af3b1cb0ea73f4a283b2ad7807d14d6ea135a291659b34f91ae4a4f348. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ES6009400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d90dd5286b9899150aa8f939a70fd5cc230b948773394b45864393fd550f67f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:21Z), 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/ES6009400034.