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 0xfcf547b6e4fb9a2eee77f49270cf04292258e492cc9db188bacf76c4b2a019e3. 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/e9612c96-ed14-4982-a131-7894261e50e8.json and https://artists.proofprofile.net/proofs/artist/e9612c96-ed14-4982-a131-7894261e50e8.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 0xec93a64007419a9a4e89c7efe4d928263bf900614d9258b5d9f4b488080f1b84. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2115422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301fc05c2fbc8555b2c2c5ce3186a0d73a51737e1aea2f4dca628b82b0cd40c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA062213479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9e707ecf5359254fd2ca17036e8fa23e3277097b104188fe02c6b700e41323. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0L2382338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39947c6a451cf18cc7a90b68aed8673defa843ffa0e6780c17e44a80791de13. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R2434555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452093b3e6f2763675511bc02430342d723474d8f1a356d279223b6c6b528f8a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA0Q2499473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1586b7ab7847e19015e9368dee387f9a75a4e6447f84a5a2cbeeb71727e6f49. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX282423881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda957ff22ddc3220e190991aec1579b9893e8f35f566863cb008064d6a42c385. 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/DGA0M2368789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec9bfb94284641fd4731ceeef93be9c73e645a0e8874a9b248969cf4b8ad74. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:30Z), 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/DGA0H2433147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85744912585ed4ee71f838e829dca3b1286f82daa2ed36bf9c40bca09630e9b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/DGA0Q2499475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724bfeb0c2f2067c54a44e455a3c4caa50a5408325a49e191db0b4aef3dbbfaa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX53U2594767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32982358d7272ad82d5fb8030743ccaec15d4cd20f3b1d29d51e44ce8179be21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282511285.