thumb|upright=1.35|Ängsälvor (Swedish "Meadow Elves") by Nils Blommér (1850) An elf () is a type of humanoid supernatural being in Germanic folklore. Elves appear especially in North Germanic mytholo
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 0x6a9212e472b952caa59f36764c60d95f45f3d21cff6badd45bd40bfe4c20acf7. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09e99099-b894-4f82-a708-ab486811ea47.json and https://artists.proofprofile.net/proofs/artist/09e99099-b894-4f82-a708-ab486811ea47.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 0x7a80c42871ff5d9e6a477ae4fb1705782ff4522896be1a4bd704b3a91b6f711d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHN82329115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12327c1f943793812d0b36d2ddcace8b102e41d616ef47e50606acbd4d20cedb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWV2320416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb45f76feaa89aff0966a5c5de9a50ff7046461931667bf1707b0c73d68f84a4. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZTBB2310973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0095ab651d9bb56a4bcc1893ef51690d7d83f78c7accb79a4a1d27b3f41ef4. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZES72429267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13587ca9577efb15ac2f8574fd4caad99e1eb1732cb866ae926bf199ea8b8314. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZZ7M2460537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83688fbfce149ec5e55b4afb7067d7714166a2f015244f8cd914cb7fb9ef44d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6F2598668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5572299867b1b887f2c6d1ebbfb62ab892f989c0564c43b667b05aabb87ed. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6F2598669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef46cec7c63a72783ec3113eeb68256d45aa4c1003deb3a7c5f06850f0c026f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6F2598670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbd9947d149aa9136dfc02b5a2c0a6747738092bd9cc509b1377c02ca0a1d29. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6F2598671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af0746c1287fd65db4ddd1aaa96a8c2c642a20e715677a0158b125ce011b0c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6F2598672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d3a5285f5fe7b007be623ced0b5131fa7e86d0c1c4c0914929111d6db9c07c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAY2563350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a1d282db55dfa7157bd3c08f311107d324bf0582edd4c984266517b538f24. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTAY2563351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b577a334d01d94c8a45704f0e638945b83b1efc93d31ba605958af7c938aae. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTAY2563352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defbb3a259433ad2a41366da22ea0eaa6cf2460e0a0220a285a54faed754751. 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/QZTAW2521867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bad47283f1021702702d9ebc61a5ddf02bc7f429ef9ad5500315276503af9d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAY2563353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaf399d4445cc77dd0268db9bd17e76e979cdef641009a345cf187c1dd775ee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAY2563354.