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 0x3d70a9495d69c8d4e5c5b085bebd5e18bb2ef2b04efccfaa241d2749a44c2886. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c0c7714-1b2a-4596-abab-57200005636e.json and https://artists.proofprofile.net/proofs/artist/9c0c7714-1b2a-4596-abab-57200005636e.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 0xfe528a013a7c83d96f592d1c295724a91101380557f50ea3d2d5470ee0adf325. 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/USCGJ2206211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b867824b22e1ddbbdc76bd99e26eff77d01212b958b9e25a2bd97ba8464b44c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDY42248038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1642c581418dc26b751ce2dd5a64c0a9fd3c21d0c26b841667d9f7b3625b2e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM92227498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b664deaf4990aafc71dcc49570d6387140c5f41ca6f0064b9f5631b21e5b6f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52409766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706ba6714b34a28055ba1b11b8b7a23d280924adc5b07d2bfa9b27b9b6148b5. 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/NLRD52409767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45b29fc8ee234c57906e0aac69e0392b5795c9dd3c8be10964b351999fc372. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLRD52410361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cf0e244dc6bd3a46d28e86d5b72b872ee9ce9572816d3b6e14c5a0baf9f898. 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/NLRD52410363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd0073683507b53114128bd98239cf454ab8d5dd9f1ca428e9df730af1aa1b. 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/NLRD52410364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc8c7f61536ecdf7f8606bbd5462e36e1526666ed928ab5d80b1424eb732e5. 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/INN2I2512551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0776b9c533ef0fa6590d2193eafa27bc072d82245e93a8bf53a13cb0ed3c6bf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INN2I2514672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff35febb2e20df3e1db318adc2aff7da1c9ae9d14ad0e5d4a98a84b3063af5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INE182326337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff35febb2e20df3e1db318adc2aff7da1c9ae9d14ad0e5d4a98a84b3063af5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INE182326337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9b45909e05c515ce76e5a208fb0a67b2fabc022356bef92d161b42024b79fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHJ2352497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7603a830a6311e408a61a591c9ec7f067f9e777813620566919c10ebd52aa5eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGJ2263185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc88a2a6ec14992a5cdf34085001ba54ea0a1a4da585f0fbda9cefe0257357. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762286847.