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 0x567f9df9da2df4523f158321324aa4f836b8bfc8bd46b38e8109f52d38b0c6cb. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc4d3ff9-06ab-49a3-82bb-afecf35373aa.json and https://artists.proofprofile.net/proofs/artist/dc4d3ff9-06ab-49a3-82bb-afecf35373aa.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 0xbc382992321c81cc585dd0499aa0758bb621e9badb803fa4fb4655015291b6dd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN91982028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc382992321c81cc585dd0499aa0758bb621e9badb803fa4fb4655015291b6dd. 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/QZHN91982028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10faea1b27c79421610b88a2e7a9f22f2d4b9d9f4939e9c252b26e932e4713cd. 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/QZES72153569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10faea1b27c79421610b88a2e7a9f22f2d4b9d9f4939e9c252b26e932e4713cd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES72153569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d660fdb546ed3ae0fcfa5cf67b4a0c2ec4c2a41d1e355bb203f86dd7cf240. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:24Z), 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/QZMEQ2175925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61864a623b5d76efad13d5ab3b8ff655ff4a31790779a20d3b8aa767e8110916. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6XS2201426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b586ec39d084ffd4b920500a36587d24b1bf0df3470d515f4708e9870f22f. 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/QZNWZ2364756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b586ec39d084ffd4b920500a36587d24b1bf0df3470d515f4708e9870f22f. 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/QZNWZ2364756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a921d2f80261d6ead4b0d4d80e76347efd0f8dd5a0ec6f912895f7626608fca. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:24Z), 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/QZWFH2357373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca576e575304235b7d81d9dae846ad53509c231d3b4d7e808750a752ae9583. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:13Z), 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/QZDA52437925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7567fe78d77bc9147812fbf5f72855945e2cd962966f9e6618cd9ff8052692. 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/QM6XS2411781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5afda2c4a92b6828b7de83a6a691d0724796a3595ab9c6c614435445f41564. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:56:35Z), 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/QZTAU2496366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc64d0a497c8611f92fd154c68f86cd191891071f490420a3b2ea775810483. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZVEM2562122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb811f43b567605bf48268ae4e035f8d9901006ec58ab51d7706069a8af323322. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K1979054.