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 0xbcf58797e164806dc04e1c5fbd2bc366747cf69b45f3c3891c1afe5b2a4c00cd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3718db-ae5a-454f-8dae-9b0008aea20b.json and https://artists.proofprofile.net/proofs/artist/db3718db-ae5a-454f-8dae-9b0008aea20b.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 0x1ef84df4695f63b59aa148fbb2611e0b4a4e46b8cc8325487563b0cd852b2684. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPE341100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e6bcc9718c066d8190e606890361252a6ea53f37796c00affd7eeb950f7219. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPL2003309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71943c597ca1a11bbd0c0c6bff58975a73797d3e43c10ad26bc3c3b962b5c1aa. 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/TCJPL2003310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eed67c8a37a39a41c68418a56e8d7d8a6c5f880de9a0ab6a9e0d20d7d54d8db. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:43Z), 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/TCJPW2304086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c94f6d684aaa55d6ca42a72af887c6d280152790e84af28f5f86e6ae4886c3b. 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/TCJPW2304088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd400126cc8be9c83d98347b91a736572c2cbe95aa4d5973a3114f9ad21c0fb7e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:50:50Z), 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/TCJPW2304092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdddc921f25fb553e620d9520834ab8133cd19647bb1320baccf356c17cf584. 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/TCJPW2304099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff521c207e7faa7f93ad52dd4fe9265f8154d0413947f646efa3abeab1564169. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPW2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dd82ab445381eb1a59e32b993ed8a370bde3c6c3a0768427e953a0040ca606. 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/TCJPW2304104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624510d9fc264b5aca9e041f9f32c8b15597e77b728b45ff650d530c5187c2c8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPD2425387.