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 0x860dd37161fafe0f681173a4cd29a44608ade7505f740bb081a09f28f977a85a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4895b278-8c5e-4973-98c0-a7df00c32166.json and https://artists.proofprofile.net/proofs/artist/4895b278-8c5e-4973-98c0-a7df00c32166.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 0x461c6e1a37dfff533fa36afb34edce106110bbbae9023a02660622dda981b18d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6N2491838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683c98ea572bfa8104cedc9ffda1f90fc35b0e08198a3678fe4c13b59e6bcfcb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6N2491839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f47dd67e08c0a170869d78e7eb31f6f6bb98d8bc8dcd963d809db8feb43aad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6N2491840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6721acb900beb89d834e93d1ea0191d688c8cdaea5c98668d47b1c16a68ca96. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZK6N2491844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc56ad029bc23b1dfffa969d71a9296874fec3c4478ff32d97cbc115e46f312. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N2491845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781d89549b7e8dba29e26e458e36e8f8d9f1ea3b638596c4eec8131c72d55d5d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6N2491846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e9274e2a109b31b6f605290a8db84f006ffccc60b0ad1c181c18bc8c1986d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZK6N2491841.
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 0x4c200b26ea7613f5664c4136750ce9d6827fc84dd724fe488f47757a1f4e1b0a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZK6N2491843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4b93f894735791677af145d4791eb5a07c24c69f16f54f9becbb425328045b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2006881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26ce525b86c28db78b64d5bf74d062cd37a9dc7476ce3a2fc6f0c5c75769f28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2006883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3c019eb98ae975a6e511a3f600845db79cc97cc16337b7163a1c589ef576c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6G2006876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893c95cd10c156467fc3476d6be75be8c302333e2040294392a1e8940be2a057. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZK6G2006877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa3d25a43a49d655a565739f2527c684ee20e647c704f88dabb48158eb4f9e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZK6G2006880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ab9e1bcab2190b419eae8a0504c8471dca4468fdeab6e2346115e14c487f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42110188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349228e1e84ae362e82492b5661da0f71990326c79da2694572a92f0fbb63906. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA072163831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a24ba9cc462595eecb3ab74181749176aac5785bbdcb29b389f5b160188fd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42110189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c6dff19080a6f0cc5f870a0edb4e9b1c1ab47f7fa3e1f9d942a06469e736f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42110190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600304ebaa0b92219135f2929def2ae0a5d0534d84f38780ee56eebbf757829. 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/DGA072150655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab15c4697ccbb3a8611ee42800e7803557fd66598197fd9520afbc9ba11cf39. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42110191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e7acbd7a3c206e66f195c590e90e26cff4927f7f5edd2e904fe1e3f0230a2e. 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/FR2X42110192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c6e1c6791698b60fc5d019783c7d7f0f8168b6b3487a8dad66d874548d543. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42110193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadbd6874912dae8c2af11a698bc79ab5231bbd1f9b5b1680423af7af7352889. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42110194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee1ef06ef48cfc84673288728fe032febeb5c51a61eab851ece625887688bb8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42110195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38350dd3823117d366d25df5d72632949b5fb42c91ddc525b219d65e76f45b1. 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/FR2X42110196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afed1afd6aa3409750ac55ed23c397ad98dc2265a4d30de292f3c37cb44bc37. 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/FR2X42110197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a4cce6ec074f63a009592a4720646f97c4ec36b93118413a768151ba5b611c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHK2342208.