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 0xb987bc74a06552a4492068c561cae23f951c3a0f28aa85d8c2da2bfb5560db2d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed8ee1e-71df-42ea-957a-a4a4d47bc48c.json and https://artists.proofprofile.net/proofs/artist/3ed8ee1e-71df-42ea-957a-a4a4d47bc48c.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 0x785e876721762f9ac5b42e57ca88606028c5bd48ca6f9941974a4932a0c9d17c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPV502100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785e876721762f9ac5b42e57ca88606028c5bd48ca6f9941974a4932a0c9d17c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPV502100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3597f65dffa769ef4ebe5f365731fb6bcfbbc647d47e722226d7b1df873b0191. 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/JPV502100267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e1c9dca3d02123ad772fb62a854cd0efe890fc72d100a24c97a8356edfdb89. 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/JPV502100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512af2917dcf5b5bd16a5213575db1fa1b938864e379847be4cee16ef6798640. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPV502100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c1c8c507c066248592d2bf17871d0b8a43452a8b12f3dbd78412ec88a587a4. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/JPV502100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1551837ede1f66d7086f1e03d1ebc28e3c90163113a242efff92cae087bdf6f6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPV502100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b46a7fc4c447d09bfb4ea2effcbc6fbcda0aec209b35a74a5ed5fcb0a3b41. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPV502100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16baaece85eb51189476e7682e13f9802d5b73b12407eb0f385d8540339611d. 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/JPV502100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47396298935bf63f03e6690051698e8dffd94a5d20fc25080c69b915f115476e. 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/JPV502100274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2190767f51d4a627ddd69a29863e2c92cdf816629ea07e7d47ed9f4d10fff453. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPV502100275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bb03673e3f3535cc121ef1873f02e9977f33de52474f68fbbf8695035d256c. 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/JPV502100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9799e12658b8f0cf61524a95a1a13152d8a30816ad2ab7a15d7d5884ebd587ef. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPV502100277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2b6fbce7fbf15ca9b38ad562602ce38149582d7d0a565cf467e4b385559a52. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/JPV502100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a493e769b89563eb4001e9d3c0b01e297bd0096c405b73216f3930cc1fcf5c8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/JPV502100280.