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 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 0xc8d3cd9da80d1bfa782c2ea39ca051cc542a121e7eb8dc02262ff3a065a1614e. 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/630f7d7d-4779-4254-b7fc-37908acb43fb.json and https://artists.proofprofile.net/proofs/artist/630f7d7d-4779-4254-b7fc-37908acb43fb.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 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 0xc54b0166e2b4fd0e3d9d03d7d6efe608a6fa8c5acef631c1f7bd5c4a510144b9. 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/CAE861810002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b5984659d7a8fa1c299cec7d7c87159d45408b7f395767fd4be935fa8091e2. 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/CAE861810003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc875acb74154934d5dafdff4ecf1bac5ed376a35165cc25693353dfcdf51f0. 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/CAE861810004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0464cc51453f0a5ce4b03b2cc76ba5d783f4632438a92dcd9d60b537bf3af946. 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/CAE861810005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6b611df385ce9e04ff6c87d442f83b3bb40b0f5536f22815d270c164e0d6f5. 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/CAE861810006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cce7395473bd5426a7458b70540c1b20cf824965f99575e733d0a618c46b7e. 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/CAE861800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fd6ca176ff366bf95978496115def6c82a38d600b19a6299ede93b9489d80. 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/CAE861810007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416304963f3a179603143a312bca36fa2a01a19cdeb6fbbbacd64446fe9457ae. 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/CAE861810008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db10b0d644f98158e9e17a8fd223dd593e0111ed59935da3d62afc4f1ae5743. 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/CAE861810011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bec5d10d8a24016369bba24e98de1f6f5d12f07cd67469e02f6eb08747cf6b. 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/CA50N2010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c6ba3381d26b0ff0271f67914430a39b9028c217e236a74b3993851104f360. 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/CA50N2010002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a50a7478c1583bc311c300cfcc4aac12da381d5040adba965e7ed7a7fe4738. 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/CA50N2010004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187175679afa9780079d33f24743f68c5006a2d838941014c16260c8d15027b. 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/CA50N2010005.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b45301e95a2ee959dcb3c3b3f168c3560805bc04f52eb811871b5d4440411. 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/CA50N2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4604d322cb215e7f16b9dd41a22dc5d06f94603d612f4c981d7786c1db4df. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CA50N2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d08d7e36292636e2f9e2e86caf2da7893d1734261b838fe819d718215867c5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CA50N2510002.