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 0x4e4f57b40e9e99b21776abf6be60ea3592f430f24aed1496443a0f8185dad896. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61a7d3a4-18b7-4ed5-8937-f98d457b1b3b.json and https://artists.proofprofile.net/proofs/artist/61a7d3a4-18b7-4ed5-8937-f98d457b1b3b.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 0x62a01f9065654bc570df4c579479bfabbfd0b8bb9efb58fb0113961cd760ce3d. 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/QZS632168873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f29b92200918f960dcebfe4fb1b3ca24a6a54d85086bc7bd62393f01a65c98. 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/QZS632104218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8eac3acfc08f2e7372a4cff928f8819898b954b7d3b9243a2815a650863acd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZKDK2266595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7964568607d5dc2999084caebd4742ceeb7be0a22e20b65df3c6536ef89b317. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZS672296523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7964568607d5dc2999084caebd4742ceeb7be0a22e20b65df3c6536ef89b317. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS672296523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6562f3e0c3ea30312ef4742a66959006392496010730fa92162afd00827b3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/UKWGH2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97269626454052eb13ec14960fc0e4240f8427038fc54fd05f4e7793c5413ae0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKWNJ2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856e7d8322119b454578c38e511feecf03b1e64b178bb6584688dcd2b1b94f3f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKWNJ2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e37f57ab4f34a1fb72761cb93cb3b567decfcce7c2b5814d4f3e4f0ad7f38f7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DECY62300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f1d1c46cc73c94531fbaf023fd141e73ef88724d45d043d1407999458793eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM42K2357666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d4e80a1302b76911b070fbc4d175c7e68a799da207dcfd64f0ec466d3af91. 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/UKWNJ2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a61bfc18972e04fa77042ec81ac6526edba171ecd2b4ac36e5d9b583cdb270. 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/DEH742438446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e05f6defbccbc858431b12e95beb5cba0da3a09cecd8ef5697575d7f024f1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEH742438447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e6bd7fec9cdff987cae022b5bdf716d25670e54d82ee86395368cf1cddc4d6. 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/NLCK42408843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a29fa492722d8b86cf8d5b74ae0a9de64d995a73a38d03d0633bb9b4a7aeb3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:04:09Z), 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/GB8KE2203333.