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 0xe6cdc83c60faa0257fc09503b7a975db54b94b47d4f455f4fff00de926c265b0. 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/594d84e9-db55-4f49-8275-0ede38039bcf.json and https://artists.proofprofile.net/proofs/artist/594d84e9-db55-4f49-8275-0ede38039bcf.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 0x5bb61e419e6dc75c5b646b32766a6c5a99614ae5165feb82009280926923728c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZLL92492265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd097652a8068723cf5ef0f10e79f075348c2499860a8678a23ac34064a451056. 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/QZMEV2038959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8f736ff065fbd623cbc5b2c4dfdd45f77dc42b773bafc1f8027a65c8ea6d11. 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/QZJG52236171.
Thousand Miles Away (OnTheRadar Freestyle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdb756fb9f1ba2197d8c5c6aced7af434cebfc99ccc186cd4d4e1650aa0c27e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZL382341339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9147d9668f077529846e340c537ac85ec1282cdb090dd372afc44506e92e1e88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNB82350762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7778dc0e2cb117c1ba44a8b81b0e8cc7a3cb3fe0b2cb1b92e0ce76b78b981. 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/QZNB82350763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a228ca4d6dd05365087f861bdf6801337c2131d2cb7358faf15522b6a0b916. 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/QZNB82350765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e19dedcb41d01571e7c9ca6a0324dace61b8eebd5cfbedbab50eed3e3f71d24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLD91733972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130b18f1551d22c5c4038d1967c179fac693dccfdb5f5dfd493052dbcfacc62. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZSYP2245990.
Jim Jones Presents: 12 Days Of Xmas (Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc077fe5b5452836e8056c4652c93a4924dd579ec7bfd5ae1bfe2ca104382895. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUYG1460992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bb628711580088c07e08c93125c9e147cc815c65978f63c8753e68ddba160a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN72272017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c48ca7528b7ca377d6ceac7f9d72099e9c9865c6acc509f03fa41821740d88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEN2267769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0b103776fb09428a21e398c29d37e962b9c1f4154c2d918b38d47f71f70fe. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNWS2357066.