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 0xf79561cf9e0dd9d27b59ceee3aa2df7a9701e2fc161bf27bed647d7eee67f519. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01524b26-a488-4a04-a812-51efd049418d.json and https://artists.proofprofile.net/proofs/artist/01524b26-a488-4a04-a812-51efd049418d.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 0xc1c02fbd51f8e9df419945ea0b68c29b4a2f7fd213a1552438c0bed50af01cee. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6Q2401954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e5d13177acdb70374cc163cc8e5804e440eaee8558eec44d156a2626c0ef9. 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/QZMEQ2462119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eee5768a95f78585dbde749b36e70cb271835c4b58d1b89584b16cc475c8b72. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZMEQ2462120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d33bfe215db18ad205ba83c550454f515743d9dd6e5f2d1d0d754b694c0936. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:31Z), 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/QZMEQ2462121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31621bfae86d1c7ec155932ac8b177ded03b2bc78bfcee91c4e9a9575cfe34bb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZNWV2494139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047530cfafe790d951305989d1b556cf3c47e8a1e10290cbfa7413e0f3bddae1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:03Z), 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/QZNWV2494140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4273804b6e25551b3acc91abf9d6d41b9290e77827ddf09ae3513f003e948419. 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/QZNWV2494141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9bcc466fef96a68fc993005c2207dc9bc495bf81d3a096d1887e1b08b17b69. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:51Z), 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/QZNWV2494142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b12bdaac21b7dd88f88175c3b17bd6425888c9e74574b6901e17b7930596082. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWV2494143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0be037e278d3905fac005adb731a2e66ec50025e33b290e2d0bf8b0af7465d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:55Z), 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/QZNWV2494144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063de960388e571f25076be53eda85cd0ab4e45c3ae7a91dcaf1e305b25930f8. 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/QZNWV2494145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedadac129161336289d133114f0caed9fb4a7f6a35eeb18d2c8aee013408439. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWV2494146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2d7055c3a45c7dab17f738a3c0ddfb3810145bac87a3145e58a6ef1ecd108a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:48Z), 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/QZNWV2494147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f875bc7c9ef582a9e74d97a366eba127b586403cf88bdbb3fb484a4ee940c1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:05:47Z), 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/QZNWV2494148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522c645dc7dfa855acfc993f868f3222dd17916cb063da9896609ddcd35e0c09. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZWFJ2485204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62547f08802bb43568b0b0a37e401f752520a906afaffbfae949a682d13c1565. 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/QZWFJ2485205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cda1594adc2c350b16e14bdfc0acc47188a09ac076ab054fdc8a8fba9529a6e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:12Z), 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/QZWFJ2485206.