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 0x966fb160b1e641aefc1a5bd27d064ad6a3aa4354f5e5b3d05ab5e50b2ec90f88. 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/912b2376-4134-4d53-9a59-348a8aa10822.json and https://artists.proofprofile.net/proofs/artist/912b2376-4134-4d53-9a59-348a8aa10822.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 0x0b2d17556682181282973d5aa9c6bf0a6855f09d6c443e5c888ad4dce4523f82. 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/TWAE32401956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa891bfe0d232a7c413d7c288f5a80f6fecd092b9906eabcf4805cb045636a895. 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/TWAE32401957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5ea78061415fecb7c77129cf84a94e758e7431d9268c19c3b9e7efec4267d5. 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/TWAE32401958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb5da4f2a1b7ee64cdc515fb00007ea0ab8833668b0fbc761bce4b7aa7d51f. 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/TWAE32402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab951b4222843bcd52aa124866eb1d1a24882e1fd6a17d8157b1a6f01f0a1ab. 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/TWAE32401960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c78bd625044bc42e70f7b5b8b7dc16bd4269666730e9e6b7084c67e3c81a15. 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/TWAE32401961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c07850108fdd841ed4b568f29eaf642fb7bc3e6397be3254474d58b9858e47. 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/TWAE32401962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a5e4f8bb7c86c221158d1f2b3a81955b3c751231cbb0f5cbdff503633236fb. 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/TWAE32401963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b47dcfbfae028474454de5549c550472b88847349b65afe3281b795beef652. 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/TWAE32401964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d3657e3f2f31e9137ce90d15902bdc22fe4042adef04cbebe9c527173b6fc2. 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/TWAE32401965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be644b3f40b42b73a7f3470936bdb9c8b2db08426cbf4460b7729135fa4b27. 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/TWAE32401966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f9bc582d0ca82a8fc21025368079280fa93a238e169fb9e39c1ac084e7c27f. 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/TWAE32401967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918756e57ee85e84a635890cd2a49c7bbc6983d1e3283606606741ec749b8cdf. 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/TWAE32401968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c7f756252ba22e7586291857f9c0941fe2c20a00e32242d7408a7450c12ec. 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/TWAE32403434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe5f5dea2e9fbccbc4d343ca1c4b55ae5dce22603e5b8565dac03398403a0ef. 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/TWAE32401762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8258e9e6a3664f90d04fba85abda17a0100c47f1ded5bb8bb7ae83ca498e1b. 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/TWCC32400295.