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 0xc6ce001954e4ef7b8748d09857d42a54da44a89f44b8a9cb0ed619d8c4e6b5fc. 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/2085956f-f09e-4a86-adc8-d997da2209aa.json and https://artists.proofprofile.net/proofs/artist/2085956f-f09e-4a86-adc8-d997da2209aa.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 0x48ee0fb235ec7088ab86860e523487b87d95b565177f047379ce8ee146705ff7. 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/QZVFR2301786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bab4abed6c34e4cda39e97196aecbae51b305489c2e1784ae0858f64bc33852. 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/QZVFR2301566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbd38c5c1cd17f33d62542df5263f257dc420f106e2e46b999b134970276576. 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/QZK6F2374631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3044e6d5e79e16f91233301e04bda2afed188bdcc60e8236c407d0c849463866. 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/QZTAZ2288031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c1b3356e3d19dea58a42e01b09dfc1869e06cc99d00e2e2489a153b97d363. 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/QZVFR2301738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fbf738e5a44be50ef48e5a2137ede2d21d3b6a13eb3c830eaef9be537947ae. 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/QZVFR2301739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec133a01ea0e06de2cdfc2eefda67b5a390078a1ff7e99d83c5c906972b7e1. 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/QZVFR2301740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd97fd9d5eed926032eb4314afa18286ea7aad2255f94cdadf1da11551b02fd1. 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/QZVFR2301741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2a828a0d636510b275c1223a447109e22acaa5dffa046f8fca99a74efd9ea1. 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/QZVFR2301696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa759caeab5a66944f1115db6bd177f9539d059c4408fb0be8241d1bef9bcf54e. 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/QZVFR2301736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf533715803d3e996bc8aff50a0db2432dd411a565373893f7afab13c8a80835a. 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/QZVFR2301742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e207e6d1092ce20be08334d17ca0339bdb0e44ad55aae0905bb7c6435aa3fbe. 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/QZVFR2301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc192a1519e8c2245c8d435542d984a628eafee2521ad31aea8b897c7b4acb95. 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/GBLFP2374547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e207e6d1092ce20be08334d17ca0339bdb0e44ad55aae0905bb7c6435aa3fbe. 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/QZVFR2301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ee82abd3ed443dfd59cf83881928e1dcc4f05aa482ac1351bca3acabc6e5f. 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/QZMEM2349836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220796edbef1c8124c708438fcad54983fa1427a0865feb5b8c9624b7d6f6275. 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/QZK6H2380047.