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 0x52ff4da16f34e5e2a6ad6cd81daf1bd0b39bb0298362f1f56a9ed7510bde1160. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f69f4364-b528-49b7-8bd2-64328c2d6001.json and https://artists.proofprofile.net/proofs/artist/f69f4364-b528-49b7-8bd2-64328c2d6001.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Salomon Högens Godnattlåt, polska efter Olof Thor
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 0x66f5fed724e98c800fdebdfcc3648021c022d88d18aa938bcdb3ff7864482642. 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/USDY42103125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6693d215007927eb9bdb56d242b9f26cdb08360febc921cd7ab30db1340d06b8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USDY42103138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3add6cce5490947aea08e0477687afdf4c4bb3ab928daef85e98ef21a64ab857. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/SE5XG2129701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf2e2f1bdad0b62cdd00a2109bdfd96026b00be4ba97db5c270bf13ff000504. 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/SE5XG2129703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4ac981e7aad089968dee024739e82009c860472562e2f64a4360008f090834. 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/SE5XG2129704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e69b697dee4ac67dae2e26c67a9b7b5bac26b723fd90b0d3d350f1d6c6fa38. 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/SE5XG2129710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53747b7db1148efda0b82d45300483d7d7067eb8b7d925efbee531bb72c7613. 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/SE5XG2129711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506e45109bc35dd20c82ed3734d1cc5694e5c92d17bc61a769e717c38b6ef155. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5XG2129715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5684b3136384b0b26f94e22dd68a1be3855b9aea63c635a54008f1bd21a8b56. 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/SE5XG2129716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08be57468ad776372deed1e0fee878e1ab8af16ee12a77ec3b478cdb0e27d142. 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/SE5XG2129717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3339b7cd52026178f04a204c736d8aa67ddea0a719a0038ea1cbab69daa77d4. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5XG2129719.