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 0x352415c1f1393fa7bc81ff31905746e4528f5301a63648273bb7dcb5ee7355a1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b7b73b0-2da0-4954-b8ec-a8350fff36d9.json and https://artists.proofprofile.net/proofs/artist/4b7b73b0-2da0-4954-b8ec-a8350fff36d9.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 0xe10bc33a9f1ab55353b067ec3330056a8d2bb151f1235c929ad9bf32bdcd9f7e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:42Z), 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/QZTBE2523289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73757f4ff2772c5599397472a0d9b3899c5dba9c576dee36951fad8b2deade. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:30Z), 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/QZTBE2545038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e7f339ef46bbabc3ae002c42c3cb84ba04908dfbf2723ce447f704fb79d11c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTBE2547239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a56138158c7dc7e3654f5e3ae2606bfa848d21992000f0e78737653521db38. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2595213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2489489348aac3a755acd4d6b0469a9894da3da48cdaf53287c2cec4c3c5da74. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:59Z), 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/QZWFE2597910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f5872d990d33bee7df48657e2c2a8b87e27c7b601a98d21bfb8e5b3e1b2941. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWFE2597912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2878c49fc196d0466790634bcd4683d6cff1653a3ea3fa6e80acab2c3e717993. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZWFE2597927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa343a0f850c2568ea5826b7374d3e86acf29a3c1aa91642135722ea712327988. 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/QZWFE2597930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e8fd827d54da2ab8fd24e7774f774eecc8f0b00690df4882307dfcf663287. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFT2540761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2c3d62974930b7b077272325f1c9815145ee40a778aafc766f9824c7fa77a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFT2584877.