Halvorsen is a Norwegian patronymic surname. Notable people with the surname include: Aasmund Halvorsen Vinje (1851–1917), Norwegian politician for the Liberal Party Andreas Halvorsen (golfer), No
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 0xdf9f38f8c4b7a5d952e7907dd6a4fe880f78e61786ebd9fe20cafc3b715f8596. 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/68c7eee8-12eb-4e82-961c-5806541d46e2.json and https://artists.proofprofile.net/proofs/artist/68c7eee8-12eb-4e82-961c-5806541d46e2.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 0x5fe6775cbdd366683dfdf4165e39dea0d2428bdd6e42df1e389918b01b6b5c44. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2110117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd29a29c20788231acd7cf7e0e2522783a3f092e3c24af413b039cb7b5589a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB2LD2210299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6413830aae954ffdca8d4e550376b7b0a98f4f430e57fee6088d38a3bf3c23b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2210176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa61d52a2447fa132df4e798e52db5fb2353cbb190af321269c6056ee4445831. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2210261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bbff26c79fc7cbeeefcf97ed0627b3417caf65b6b7b08607de667f6b598ad6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB2LD2110300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca9ce0e69952e894b11c0356351586a4c924ce6fb680c5c7fcffc49b52b766. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2110224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9de811e8fcad0d9dae1b2891694431ede0b9ed23ca2b3436d3b80ae065b05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2110214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6c8ab83f0688c92852edec40aa1b32fe55ccc138a9d2196f8a9fb132172307. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB2LD2110164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd60e3161ee245533425c4bcef41c2e836028fb17ddf19824e31d1f5f4e4ca91. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK4YA2139301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d327d1d818782b3832131845f08d20ada9e58bcc29e7f092525c91de280b1e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2010281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc3916604b2a33acca5ca3e21ff2aed36436ee4a95b06430a1383d335d43e92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF2082717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199fe1df5a6f99156abd43574087a025645e9a163bf70ba95e601fc6df741e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2076428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9deb4a7355a3c99bdce08b80ba842f1bcbf52e96e8a615c8fce96feaf0f2127. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2010016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655c939a1081f3b2e12b0de750c85b55f362e8ec2c17837a70d55f08bf6572f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU7422060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db83026b4d32ded14664548e3ef7ef5a0fba214f4fa64e464b76e83d039c90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD1900436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7920a9953987db00a431be392ab997e366317c379cd1cacf12187cfa13c82f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD0902180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3141c4a3e6b40e6269feecce2fc2fdaae8436b20f31b938584ec2e311a8a46. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB2LD0901978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac5f6a06c9658fa156211a8ceee31506bfdf4c2fb6447eddb7f60e8ee15a13a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2320368.