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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 0x090d7acb65f5e134973db5e78902223f73172a417d4c55fa7b87fc923d61c6c1. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55f022d5-f9ea-4cd1-9bb8-16a9922982ad.json and https://artists.proofprofile.net/proofs/artist/55f022d5-f9ea-4cd1-9bb8-16a9922982ad.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 0xf4c1269190bac1472a5c70766b0eb9cb541d4a968c8232eab6e7b44fa2b614b3. 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/UKKY82100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130b278616a1b1cd92d7ae6c2961961917f970c0436b2584a57e3f744fda5212. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKKY82100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a7f4306b16873f29af42acd25913aa80d46f2cbb8fb94981359ace89f46364. 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/UKKY82100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d1cfbdee3f7d5dafdfd5f0e996af5aef8d6eb3d0363f7db8884b6eb121d3aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKKY82100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a4613fe9f08b1282e08328e3914e69b0ffe8a8fc9a497c871eaa5fc7ac853e. 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/UKKY82100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4f559160e9ce8497d4a7ccb512e623d48e765e6e36d3bc373e7118587000f. 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/UKKY82100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb7ff32965abc321cf6d8897f36b734434a58fc541a4958f8797a24aa72bfcb. 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/UKKY82100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bfec1c0b31a41681bb37bae1d19422d0d69f10af310e9c0a81b74388ad8485. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/UKKY82100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b9f9b02676471fc4c91cccacbf84171cf1ff5401917abf1a4f3fcd40d5fcea. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/UKKY82100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f77bfa52a81b9fc4e48ed9a7aa7440fccd64e05689a3f5c9e1d984b86c0489. 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/UKKY82100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe7abbbc0db66f29229e2bb9518220837629a055ad4e0f0a09cdcf4af6d5e7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKKY82300106.