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 0x5021421d0039c94a084d0ec859b0fec984788c0bca58f855e7dfedb7b1a6433b. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/759a8985-7672-4967-a035-2f2e27d3c492.json and https://artists.proofprofile.net/proofs/artist/759a8985-7672-4967-a035-2f2e27d3c492.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 0xc11614010b65c2af59b781aa8982daacdd7a6d5c7e361dddb6471769ec15f1a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32472911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3625192540e9b6056a83b1efc5f2f1debc4b9d237065d08b7dedda55da6396e1. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHN32472914.
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 0x765e3ea3d652296e3878dd995ffb26c87714c249f6174fbf052fd438413d60ca. 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/QZNWT2316038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c0de30ea243998882cf14dcb27a3a01e41edb0ad8e88ff69e0965f052f270. 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/QZNWT2316039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e538890edac635a9a7049624bc5a39c292ee2c433a4a82cba2b1a39b2f9ee8. 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/QZNWT2316041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e685736ffc6377cd6fd19ce046eaf7f5f7e63881990d6a6d1e4b2066b123c. 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/QZNWT2316042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d13c7491e65712eebb0f265d06fb45b2a6a7c154e90e16b51700edca26829. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNWT2316040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292dc239cc8022a1ab07a2967902127483622691e8c1bd9d3c03de7c33e135e7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWT2316043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d02dc5195ca960f77b1d3da03125a54fab8f9733056aa45390bcb1b68f3a367. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2315200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d51453a0d799fd7440eddd7fe8330673e0201354f36240f44c52572febf8106. 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/QZTB42431134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc1dfd4332978d3cc5cb3f657545839c29458bae532ea14fd49d627cc5947dd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB42431136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd472a883d2af68c6f578736ede6c4a2fee3aa6333478aa86fb8c76cc1951584a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:05:55Z), 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/QZTB42431137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44e814a8ddc77de9e621e4de370cfd908474fa0e92f85ba130f1e9c6ff7e5b9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB42431135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffb02d8aa6654ced16e5f1a4c3f10788be8cec83c16a112765970ccf6bf9f0e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTB42431138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb8ad74121afa6d9a58fea05c4fffdc4f2da6ede2bdbaf50ad30e223488c92. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB42431139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f366884154b1e0ecd541d02f536f3f294402cca0efa03e9c991815f8b0b42a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB62412526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e58b272d33ecb8d951b163dffc500f81090088609c476eb4577780596569dc. 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/QZNWW2448161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb208f62ecab2a15be9ce4f796a0b8176127ae261c20c4dc5399263fb5adb2b. 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/QZTB62412527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a12e8163a2896e0662a567ebfefe136a7f71888d498946becde6370723f2002. 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/QZTB62412531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77261fc721d78a290a5f99350022ef300d8f0399e9e9bc884102f8979e7e4a16. 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/QZTB62412532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7d54041d8deaddca9dd4b5f04715d83d5512e95a62ebec26f5bd3931eb52e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB62412533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5f9512d6f7e6d065514c94c3e4173362f2976426e6a56c3099f2951d84e5cd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB62412534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66ea4a0a6ee7d0cd5251e6c187061b5273c1d6ec2a190d7d7bf4792a31f83f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62412535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3fee0c8e8b8650dfb227de83ffa81988200a7f00689468bed28d038b677f2b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTB62412529.