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 0x61e577496ab3b9fb2f1199eed3240503cf2531826a21049b74a18b22c4ed68a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4e0bb4c-f9b8-4f91-88c5-b704ba8604ae.json and https://artists.proofprofile.net/proofs/artist/c4e0bb4c-f9b8-4f91-88c5-b704ba8604ae.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 0x8170134257c03c3ab9ad4ecd575fd9cf752f0b7db2af7f311f55cec9465d6f5c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:17:48Z), 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/QZHZ41953183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7992ae3590d40615c52187c9b33f7aef88422b8e7e2c63989da0959dee1e32. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHZ41953187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d5fbba25a848e3fa3ebf5f662a5e8d99946d6b919fe8ac8e0611d0520f1205. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHZ41953188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f405b499f8836d01c08298566d4805f4dff1b06975dfdc1bebe06b6f4a24d2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:19Z), 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/QZHZ41953189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2e3699dd606d330dfe68b050f9fb0626374f1dd3a6681230d48a1308608510. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZHZ41953191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe640b6eeba9a8c4b80b4e4fc2452aac41ea7f7877dfc862af99637c06131c2a3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHZ41953193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f24ac2da3a5ce9e173aaf74c21ca37b6b2b2b19e6ccd35d3410d1c1467c0eee. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:56:26Z), 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/QZHZ41953194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a93c96746f289a31774eeab370c97636cd100bcca180c15f75751fed16151d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ41953195.
Pequena Princesa, Meu Céu Meu Sol Meu Mar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd1b2729f8688279bd7bce4d4adc1b9c0f095bdcb0a85ecf1eece5506ca4c3e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHZ41953197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c1de7cb9b10b48a1e2e18820e1da435ac1dd5ff29713ea96f3b752e8be31a6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:04:44Z), 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/QZHZ41955525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c4d165cee7db0335e149484f7a3e58519610222b938eb50a7b920776460f34. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:03:25Z), 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/QZHZ41955526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fc02ae2732f50f1efc97d7dddb925b2a0df27ed499426f7f17545c0deca1d2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHZ41955527.