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 0x4d55d5ecd7460dd4d3b15fcbd898534ce9ad9beafd49f405a0f0d9ba455afaac. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55ec5b4a-ac39-49c5-b53c-68001f1b4fc8.json and https://artists.proofprofile.net/proofs/artist/55ec5b4a-ac39-49c5-b53c-68001f1b4fc8.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 0x3c63f3a58da934d8631408d3e104882bc32f6cfdf0d8abcde69066d671acc9f1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR1261200759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882faf8e358fc27673d4d225ce9e99707f954e1d6bb08d89cc92f86823cf4ef3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR1261200762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48860a105f147819e84866fd7476d2f4e60f38405d3afb023551bad4dd0cc35. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR1261000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fd4bd5b03e868d70bb308a27963f3671a9489ab65c5189b474863100ae8374. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR1261000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5530afe052dac3ab9857763d37bfc66e19041f549c4e08844a841d265d5e26d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR1261100678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73904f4d96fb76100b14371e19917e08336751eaf8a887aae9b5192280dfc82d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TR0411406104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b7eb0e5b793be25584526194947733cc0ebf93bc57952d91f01486f620aba4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:53Z), 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/TR0411406105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115f75c06ed0539f1bc7eae40a8bbf26bcd930b37addc6d0fc853aab5c1f4d5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TR0612100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76629762aad0233c2dbd25e79fe97e6e3f5a32fb7627a1a2fbf3afe89b72a6fa. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TR0612100110.