thumb|333px|Freyja by John Bauer (1882–1918) In Norse mythology, the Vanir (; Old Norse:, singular Vanr) are a group of gods associated with fertility, wisdom, and the ability to see the future. The V
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 0x17f7f6d7f06fa6413ad3cf3e511a7b128c4dbd2d2be120457718851cc9b5515a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf0602ec-7aad-4a11-aede-e254b382991d.json and https://artists.proofprofile.net/proofs/artist/bf0602ec-7aad-4a11-aede-e254b382991d.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 0xcde4a4f4705bd81ae538f2b3d769820b4dc943cf3bb292c9330afa0213b1a3ad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DKQ4A1100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d1124673bf676bfa804e69dd70870fd587a6aa142949e3c4f88099c62c74b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DKQ4A1100504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37788f24eb48aeff820202b29bf09138ba0e4cda30639043656b21af7328db8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DKQ4A1100510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670124d701dd9f6b80198e74b8ed86a95dae5691cb1b0a2e30d5647db51545d9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DKQ4A1202601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e95a35eb4904112577655e1726f7f56a33a53f27a48d8aa39c313f6b21d82. 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/DKQ4A1202606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4695c3fcae90a0d83f7b646073c298eb3aec03cf300d107c92cf6a13adfe3c8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DKQ4A1202609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3480621d5f0cd5605c4fc77145d447ce4a6597c1badf78dabcd098c262b40a6e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DKQ4A1202610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268edf0f3c56a315059e53919633fbae038282961f3ae9c31e5dc91ddd3bd056. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DKQ4A1831501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897d6934c617f4d622ae3d125501983bd25d7e6ede906b4e20e831c69d517282. 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/DKQ4A2102801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea24b6d896c2e88c7342fe8db675238e76fe4941ea4d1ebea96bee61f8b9b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DKQ4A2102811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8b1e01c7554a49b6e5d21aa1fb833483518c4468ed865a3505c357790ee4c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DKQ4A2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af0c61fdcfdde39e1a2faf1fcc830b954646b39f2005b875d2569766bda0147. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DKQ4A2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8b1e01c7554a49b6e5d21aa1fb833483518c4468ed865a3505c357790ee4c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DKQ4A2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af0c61fdcfdde39e1a2faf1fcc830b954646b39f2005b875d2569766bda0147. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DKQ4A2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5452eb5e085da79bf7a7864d25c885133c1cf42c0fad9bbdc05df4e496a0704f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKQ4A2400103.