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 0x9e09b5d288e508ee7c05b282a0f1469f2a5d1b73effb1063f94f644db24b56f4. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a553e18f-7e68-4ff4-9e55-ff7d0bb35365.json and https://artists.proofprofile.net/proofs/artist/a553e18f-7e68-4ff4-9e55-ff7d0bb35365.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 0xa8b52600541b453ae34cdd92ee5f221b1c6fccdc137b29988ddc57f0cf5dec80. 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/GX89G2341939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6968377c027db15384a8106bd894a143cc3ee6d1ac164723e48c81fda3509. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2317734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3406a15dfed60c9e10103c4e630fe393f1c03f3d6407a54eb92de9bf2aa7b. 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/ZZOPM2239800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0ac82841ee6e9b9a65b35f49c4955f2eb14ad229c44f6186a7b33a5d459e1. 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/BK4DA2302021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219a0521a352bb4d6f626b1822819df12ce36d1779fd59c2332429c5d2b6996. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2315564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0541ea146cad69119850ad6cb9d39e50effbc141ea2603698ffd0124ad071e60. 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/BK4DA2307271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec4568113492e939ca9f2981411262278265b987d7752991e615b90c44c36a. 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/BK4DA2311936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6256c7b22de474f6a1930de194c515d4ae96e6f43475bde86d6a0c64512ffe96. 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/BK4DA2317738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219a0521a352bb4d6f626b1822819df12ce36d1779fd59c2332429c5d2b6996. 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/BK4DA2315564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a8d47926706b7660f3f5b52a34c23e39a6c453df7abd8fd533c1992968aeb5. 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/QZPLR2490041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed4fd926391e5c19c78cb25fa538165a06f07262c94e51d90c29153880ee809. 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/QZPLR2490044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d78c23fd8e4f9bf2c84aa16e36df618df6ee574c52f721200f7a1472cdcc0e9. 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/QZPLR2490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1405fb6c2ddfbc72d700f2f2e20bbd810e120f74442a094754cd892a7de0eb6c. 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/PYC842405980.