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 0x899845cf003e8f3146e74182357521d682e5b856865f6adb12921286d00ecf07. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebaf0546-a8c6-4da4-8edd-f3af6dc19bf5.json and https://artists.proofprofile.net/proofs/artist/ebaf0546-a8c6-4da4-8edd-f3af6dc19bf5.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 0xc600d96b365a3b4e314061aa3246873fe709b0e97cfc980944ceeec84ff3b700. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:26:35Z), 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/TCJPW2371922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529f05f710a895c2c0a17e7c15c84fa69387816f7aa1300b79ef5f56161ba736. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPA2429801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a2fbb2c1f479bbb2aafa8ceefde087f67944fb4159d7c822aefbb51ae3e4c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPB2412516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a2fbb2c1f479bbb2aafa8ceefde087f67944fb4159d7c822aefbb51ae3e4c. 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/TCJPB2412516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4462d695e5b1d2ffd08289fda3078278b3a06f77303c94b2de01726fba1e3be. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPD2405068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf372f1e9fa5a30fcc3aa48aaa3978efc0963e8ddd2788f3cc14ee6eba3c4851c. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCJPF2589309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba6ec23d5e39715774bc020b442ed76cb8fdd9a85c613811a590f29d69f620a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:39Z), 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/TCJPJ2526940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7036661d9abd77a5cbf26d01a5bcd0fea60d1591e6a67899c00ea16766893a7b. 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/JPPO02104224.