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 0x9de9be1af4a2e6ab68bd176c392e1fabdc73cee47a7c42fb38085216c5cd4c26. 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/6f378d9c-ff8f-4e1e-8cd9-84e868502245.json and https://artists.proofprofile.net/proofs/artist/6f378d9c-ff8f-4e1e-8cd9-84e868502245.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 0xbbdd6475afd974ee9e63161211f2c26abb015a27eda322dc1c3b05a51a1cea03. 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/ITC490800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342f6b8b7a463f085d9f53e7bc1fcf4aec10c63fd19d0d12525132ae219a4302. 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/ITB282000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28f5e8b5845820eae4cc401c7dca97e09c0b40aeb8fd93e6a70c276d43d4979. 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/ITC490800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b94f2712e089582552d8f515d0758dc3dcf16e9394e8d26d5b357149409f9c7. 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/ITC490800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab7583a7464ba101d82a1b72752895e3a41d9943123e03863d2d709c352ffee. 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/ITC490800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e6ccbe8c278c4ebc277c8496bc3bf0fc7d27042363e8a3a33bbb27850190b8. 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/ITC490800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2def168108dfb8ef3858cabc9541116e7f091d21078386988a2ca63c234434ad. 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/ITC480800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e6f6e00a8462fb42c71ff058ddcc77985e86c435a2a87eb9b9371fa8e399b7. 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/ITC480800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd090d1c2d6544738b5623e76f070a1bf1223dedf3f7e8ee2d8a4e3f40b3e44. 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/ITC480800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd975ddb26e4525b23087b1acf8df0667a49ead12484775ec471723f6b5e95c8b. 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/ITC480800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16a16616132df8d1913a5f4007f1650cb95375d96b552f92f170090076672a0. 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/ITC480800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4ad05a9cb73127aee7af7520a60165bd91340ec057a45fcfbf31e1799f8d08. 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/ITC480800064.