thumb|right|A downslope view of part of the eroding rill network from County Tyrone, Northern Ireland. See below for a close-up view of a single rill In hillslope geomorphology, a rill is a shallow ch
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 0x5ec3193ca0233460f2f96be7ad13780e40ccdae4a6fd66b0b6442e40e9bad627. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7bb57e9-7e31-43d6-949e-488bea5c0cd4.json and https://artists.proofprofile.net/proofs/artist/e7bb57e9-7e31-43d6-949e-488bea5c0cd4.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 0xd3bd53919f3b8aee7509b013c1f9965e4f24b2b495fc0af21191f0667bff79fb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEH742217075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532716e0370e2ef79964e40ebc21fd656d8fd97f81869db7a0183adfeb6b5ace. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFH2322519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21e79e6574554f0adfaff0ab261c576f40660a03523ee3b7e3254df06c7291a. 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/QZHN32330672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e608f7058e572170640ce15207bad28d9ac18cdd64879940064101a1766887. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:59:55Z), 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/QZMEN2335950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abbacd83007d9b6166fa3f9b92599bca67f0a271374330289dd4c3dd86ea44d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEN2335951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e0021e9c9ec5c8f2bbdf2e097617660b7867968159b53574ae04113f19eb23. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:11Z), 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/QZMEN2335952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dc094fe999cbe42429c5df0dd635ff132ec83ea50253a105338a8500032ffa. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMEN2335953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b516482d284df72b1c7de76614b6f48d387b96cd05f2c0bd3b36c32932fd277. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLCK42237646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fcc1191827bfc001663e05aaba08162cd415620b623795403e60454cb7c480. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:14Z), 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/GBEXH2401950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048e47a1272fd8ad919c77c00245811174d8fd0771e795b72427cf3590b81a4f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FRDX62501850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa860e31beb751877ad69d9a9a471ab23b76f313b1ea6bff1f6f8a75f2cd243. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:57Z), 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/FRDX62501860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac5d7a44a97e6e6d6c1ad78a0103b2ee18357ca2b2b31bcf621cb536a88a07. 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/FRDX62501870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea30a168d8851dcc1ba23b57ff481b79d5abfda6fa889c58ca719466fb457f5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRDX62501880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b81e307c81b3594e64159067d705f2cd6ae130e0fefabd7a6f4b6b8722e298a. 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/FRDX62501890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8331abc9179aa89de62aafea11d95eefe2705741df42505bfe917bcf31a601e0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/NLCK42508432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5475c09461232946e91bf3b7f60844443283a2cd081e37a774de563e095ab6d6. 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/NLCK42508433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2b4d21eb0c0c1d2c7f78d9e963d930882c11da062c274eb304110b5b5b36ef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLCK42508434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1ff7568206a3ce942a7f18534c3021f22c8070234f9ffae16265a7b269fd03. 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/GBEXH2401918.