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 0xc44e01b771ede244f9e874a82dc6a19cb9ef98fae07e0af407dabf9850a32bac. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bb67f2f-9ef8-4597-89f8-e421df917c12.json and https://artists.proofprofile.net/proofs/artist/7bb67f2f-9ef8-4597-89f8-e421df917c12.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 0x8fb11c754a649ac90f3a3775adb0e369e88354ae8bd9f0bfac561da846bfe6ca. 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/QZZ7W2527104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf368ac39fc591c2c3c444e8eebc1758e6948b45883b2f02e1eadb938490fd5fe. 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/QZZ7W2527108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf491d347d70935516ee1794115cf0a85e9db6aa35df677d9e706dd82b9aeb6. 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/QZZ7X2520159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a62605fad36a2cab266d8638a31f3af3e74660af3930fb41ea63ece59bd424. 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/QZZ7X2520141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25037ffa73374688194af0ad1994b50f135686f7ab34ce0eace15a3ccc08d4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:08:38Z), 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/QZZ7X2520157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910e38d987bbc8d5ed92c6cd8fbd13365e1be0c09edcb2456131916ddddfd23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:45Z), 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/QT3EX2524917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6859854959b5f902e02d135d82f936295a3486fa99fadea54b67c0e5ffa34a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EX2524920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd982e555e1f94a7224a050851f7b8cd96ba6d9895a7b9b02033b67d541227b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3EX2524925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c864cc91699af167f07b0341f1ebc863dfaef35ee9beb0a50546c79e3e385f9. 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/QT3EY2540863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064e9c23abdbba44a743e506327b6e0301e98bfc69f94e8ac3fda332fe0231ed. 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/QT3EY2540870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cd85a501945044471d25095da3419c9ca9ae527806e8cc60f8c67a3981c25e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:34Z), 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/QT3EY2540873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133b315df9600621cc9458aad2fcbf63dd16cc853a268f9e4e6f7d867bca9531. 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/QT3EZ2538875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf729a5cecd3631465a4a07ec014598b9efdd6a9671bd0947084e211c15fe16. 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/QT3EZ2538879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09fc2633a4685998a79cec97a326a8eca5ec1707a88cba95a8670b76ba86ab6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3EZ2538876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6f36ceb9509a9fc66738cd2c4b0a39b9635ada3627ed4382ce40915dd4dccc. 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/QT3F22550387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe86e745fe647e952496e0e8d7b5498905644482c0c2eb373e2164a26e819e3b. 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/QT3F22550382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ac47666fc7f5ffc34fc15f09b624cf3a5b5ba0383d18f9f8f974ba8a21f4c. 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/QT3F32570146.