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 0xb1b4d1b4ad5f6ee07a3e62211c773ff04929173ac8f52b66ed5eefd3b2513b37. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7b985f7-47d2-4939-a9b5-9e940ab37ed5.json and https://artists.proofprofile.net/proofs/artist/f7b985f7-47d2-4939-a9b5-9e940ab37ed5.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 0xeaf7a71b428a707351a4289d1a09f4d6e7a5839961f7548722c437f6e573ad9e. 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/DEZC62200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7a71b428a707351a4289d1a09f4d6e7a5839961f7548722c437f6e573ad9e. 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/DEZC62200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72047a8ec43ae05a790a0b8977bcab8d00af9805bba51fd1c8bc572fafe76d28. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62415459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4770cf175ecf8a2058fbc3b6725dfd2c8030768df5322618e76609c1a2c44. 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/DEZC62431594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f4a0a0e51b60e119710c97bfd8140ae7ed98ab332f21d2a25451ba3085f8d. 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/DEZC62431596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c2628c0b4ea0d795ac422e03e94e9acb4e8db354ca0d709b746cde803e0ab7. 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/DEZC62453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1008adb722060fdb68237a19ca0cdcfe672905a30b23d723e0556e1a332d6. 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/DEZC62455824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac89163efd7ec4a91a6b2b1143e8d6740bd20cbf84164ce26bedad817a4f7a9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEZC62466752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0f9f515a27db3eacc023d6336cbb4145e0981e025b4f32187d438626acc6e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEZC62466753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33dae258ec7c847301ef9bfea98ac8349086305eedf5ddffad826a8ec8c47cf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZC62466754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1b82a171786cec4d77b899d2a8890a983f007aad4b07bdde88ca94ae1358b. 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/DEZC62466755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6b348a76d443f93e5bc426550a2567668cc114164f1a344e5479649aaa7205. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEZC62460639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c2628c0b4ea0d795ac422e03e94e9acb4e8db354ca0d709b746cde803e0ab7. 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/DEZC62453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1130ea5b45999af5719bdcf88985183be0e1c7f1d7c2cb84a5460e692764f366. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEZC62466756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0002a0dc3a109dff3a2d0fb2722a78af29e5fff276872fba1e61b040b4e9b1e2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEZC62466757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6586dbb8b05f2fcbaf36f3c97f19039c77e2c67a590880df4b726fd96bc0f997. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62466758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b8a78829be62aab46af5ba80ba6de00b3e349902e11fc7519b645ff04ede2. 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/DEZC62466759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb312948296bb71bef8c7226601c1111dd3f07fa7ff929787cb8cae733ed4ff1d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZC62466761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1008adb722060fdb68237a19ca0cdcfe672905a30b23d723e0556e1a332d6. 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/DEZC62455824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dc8f8535b640ddd7e832c69535ecf0c6ea34b8acc735fcc75b76fba118d62a. 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/DEZC62466764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2965de66c90c618a73976f230b77f4e24899783c5aeb34cffa5723c38747251. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEZC62465119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6d4f04252b86dcdcc80f22e048b42c18b34d80223b6110fef4caecd5657d8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZC62466765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95d279851d02056cc81ecbd91a56ac0793af7f40ce8f5a0715cd9e1c9f58b35. 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/DEZC62458360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1a3093ebd1554c80d33f4f85a175c07ca807fb625b918f3a3cc82f771e3995. 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/DEZC62467546.