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 0x047482bf4401fef60d72a34653ec28c821e3b61a081bef61872c4b91c6eab476. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f42ab5c-310f-47e1-a2e1-d26ce76e7d9c.json and https://artists.proofprofile.net/proofs/artist/7f42ab5c-310f-47e1-a2e1-d26ce76e7d9c.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 0xb31410f8618baf1ffd1039537fb7a4368fcb8e105191a8d2bac22dd4676bba54. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2126622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7391b47d1cf5926fa053a8a3c693e07f512b17c054cb2ecabec53870d0cc2b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2125259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0286390b4f8aca2c073b8f2367a0030fc4e5484ecd00acfb62ee236368ccd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G2126623.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e454e90da079b464d652cce46c9256f376e7a93db144e1cc4b7e0788d25ceb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES71G2126626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2aaea8b2d8fb3e348a42b62b5907bca4cfbcfb5613fbd3636ed9ff0eed8ac7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2307005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe035490383fda88d3cd55182d07c4a054c22bbd53feece15718b290aab514b2d. 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/ES71G2122478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d284ea849fac690557ebde2b8f69bb81b595a90bb1031eb3d8173d5807758a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAGOO2056719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb6607c365bb8ccd22a2d36c41bad42f6d7a6ec8f67c1f380d7aecf1a8ffa21. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAGOO2056731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4febcfa4ea04689460f0697d740866bae108016f9823f9b77d159e0e8507ac12. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAHQJ1958451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0267cc65f1f31f4c6e86288add3a21e904aba9d44f2e1b7199b52f9597cf0f. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/CAGOO1901355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce7a288d9f84ab60bb578d8a899afe7dbd5a39be8f10a8106fece2539a7854. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO1901354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec69f0f9b1925d647a3675e9affb7e36aadc67ce238a5eab320615550da0bdab. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAGOO1901356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f53321380b65118dfc1f2f3e07c3f455ceedf6cc52ac16b1c0b84e29e54b3. 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/CAENV1992666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea8f46dce08aff476e96397ef8c4e2edb55aed273d33112c9ebeacd16489c82. 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/BK4DA2215205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a7f83a572ce93ad7c0d62a03211005ce76a8a44e1766af302d25bb2bdbc5f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BK4DA2302175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fedf58a86b3c1df2e752a564bda60a3d3604a249af9d5745c3338c56aee7de3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BK4DA2302176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2fc6451420e8f3fe6d9a33bcf93609e14629c22d355a4f2177197eb9724a5e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BK4DA2302173.