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 0xbd3b9bf54636589a7d455b52536140682198458027f9a69ec51230c8d7e0315d. 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/a84525db-acbc-44b4-8b3a-ee1af8c1c72e.json and https://artists.proofprofile.net/proofs/artist/a84525db-acbc-44b4-8b3a-ee1af8c1c72e.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 0xda52fb19617e3b1e6be253597197fc44109c8096d2a6cb05b0f7eb3f47a8cde5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ7M2545856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec1df40433fa981f02d042d94b153aeb6181920e45fa7c911f26e26fd33320a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:03Z), 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/QZZ7M2545857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452088d526b17b6a042a04a83e322439690e8643e60ece9a640c09859120ef4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7M2545858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04468dba0358cc9f2c3b6fcb3502a0a3a9c98f7ed67844c62c36f4950ce141b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7M2545859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47768368f498a1202b5a3e720cca99860f624d21d591f4856d9530afcbc394c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:21Z), 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/QZZ7M2545860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7be2c1d0e9c2b3d0518c346dede5fd1c6fec2589b7e7a9084b9fcd3aa068097. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7M2545861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403f0e4376cfc2607d9e90b8ab1cd8d8d26f33121977383a71041f4ead5434a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7M2545862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1356e6c71cccd4a7476c3cce1d05376856c8148837c66b7d58e8a97536b6630. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:02Z), 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/QZZ7M2545863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe669790dc25f8402289823645e3572213400730556d7fb187d3e6b44e6a65960. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7M2545864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479fffe7399b140c5c270a6749396a37370fbb2f7273770f1ce73ec63ec98f52. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7M2545865.