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 0xff7ec0ccb33aaef0372508702b50fd380ed1c85c2a2ac253a372173b05a915ed. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5eb9ce4b-f237-46ae-952d-4cc52f5cba73.json and https://artists.proofprofile.net/proofs/artist/5eb9ce4b-f237-46ae-952d-4cc52f5cba73.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 0xcf0e7d1c04898ca1c08fc4ffeb10130a232a33cebdc1509a4ac99ebbc40301ad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:22Z), 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/QZFYX1998858.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021e02fe18423922cd381b93e68886927210fdc3c4ce11b8c3cc42ce1bd6b6c3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6Q2111940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a7b1b49ff287dfff991a1e126dae1e44a204d2b523edbadeb0f0cd25e020a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNA2169141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30dc606dbfda67d6b66f538cabcd89a793a717c74de7132e1fa32e22b8ffbc2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:41Z), 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/QZTB72273935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f7bc3ea66a747ed0f3ea7a7314824dc88677f3fc60d2a18ab6e07474ae540b. 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/QZTB72353221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b7fae33b56bf271d1ddbec37ecc89ca6e37db7bf15a67f149f3ab5a82c605. 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/QZWFE2362839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8a57ac6ddcf0ac04112fab5fb8e8b3b8ae87e3316b2dd5e2bd8c65f64ef31. 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/QZES82263777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ba81d337c13bc6c89fe7a1c654a39a1992152458396d6edf6dfd1a8a962fd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWV2343240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826f31a49d40dc3c2962a635a1b15c69d52bacac205d461ec477817eeab81b72. 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/QZES62337479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7396185daf0b473dc6080560613b68611c8444a665b0e9591262759e869c7487. 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/QZES72362811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd181fd1881a699846454df9d1c87d2fd125e55e1e8cfa1e89fc7cadc6f78d795. 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/QZK6J2302740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d488a4bd4ada551e6a3981dcfefe06be7980fbd9693cbd1ce280472233d8fe5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWW2348819.
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 0xa9f0ea578c3ed40731e38eaf828d8d62b2d9bb15c432ead8a051927fa119a628. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNWX2291010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ad96a9fec4bff1b40c1294d3ad27fd72fd7e9c5af5c2e4df56c70dbaa0dce9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHNB2454783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7161e432f5e108f22cfc96b7ff6b3e02ebfc1a56d67d80135a40bacf94fb1013. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWZ2517103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f078c9f4db5d6b43708a60bb5565020a0f6fea611bffc430fd5f34a4101d3c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2517104.