John Gunnar Håkan Serner (1 September 1933 in Malmö – 25 October 1984 in Stockholm) was a Swedish actor. Family He was nephew to Frank Heller, and stepfather to Malin Gjörup. Awards In 1977, Serner
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 0x17c1fc45167a08457a3afcebba2e91d42fa0f547e69986ec087efbe709d65060. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d7105c9-e804-4ccf-bba9-682b12e79b49.json and https://artists.proofprofile.net/proofs/artist/0d7105c9-e804-4ccf-bba9-682b12e79b49.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 0x1fbc7895a8d958d7ed4f8f9cd20111ad99e7ec9d31124eb3bc2c66e545ce3066. 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/SEBGA1602222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05aeb2e9521dc2d61917714a88faf96b5c3926b24c131d19bbdd287977b9a46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEBGA1602223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aded8ae81fefeefe8398fb8ddbeae035a6b342c121940b274bbb33b594d0ded. 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/SEBGA1602224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b6c02d82dca085927a3532f1d9445e63d10fe78a01d92c4ab4f86eabd710e. 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/SEBGA1602227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d4e39e5c76a6a941b8c40e46f117c579d10ff2e50e2442e3e9b4dad10faec1. 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/SEBGA1602230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1431e0b75486c8d5c6d99eef768b036f587c9ac9ccf85d212dd27583f713832b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEBGA1602231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254253b239acca0a06bb5109d752e8c7033eed6bc50bb06bcbd4e1a3c3449c91. 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/SEBGA1602233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd80c35c532fc8bf127f26663572802881e6e96b69c33432cca680e0dd4791a6. 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/SEBGA1602234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8157b2bd987e133c99326157665b17f8c1bfe96bf27f81fe353aa83d30c251. 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/SEBGA1602239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a8e37f2b20a81098af87e0c4f18c95739a2ed6ebb87f4e4079ec32ef840d87. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEBGA1602241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021f73bca71b69331312c861d25d56fbbad56670bc5496c1809bf5d6ea3aa586. 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/SEBGA1602244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bceb634932005d76d110828cb41f9e85a8f198f7e74debd5653443c3e97a0d. 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/SEBGA1602245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea1c64a9d1149befd9d2dca410950ac4770b3b607bcc224bf2b37765b2ad2a4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEBGA1602248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbbc9edbe10c350ab35f7511055560f477a5e639920467342223302b5df416a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEBGA1602249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab3ee0a22b5954f504623f572d519962f1104637dc286ab9c09907bfdf3f2c0. 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/SEBGA1602250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b3c7d846569a14ee6d398ef095710b4f3c728b9b4f0c2e0ba00cd793b91256. 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/SEBGA1602254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd27939cb58f39911e74db01af463f3636c233d865a3d10668cbd30aef973738. 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/SEBGA1602255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e9be091dab10db24b376b133be90b79ecfabf7c95148c961efe367770dfcdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEBGA1602257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6bd9916c74fd56e8f43324ff73722e9f1723cf017fede6208db551e93d071b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEBGA1602258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f27bbe8628702cb00786b05e77fd7f9f498ee4f00b4449d142d3d12faa3707. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEBGA1602221.
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 0xbfb5b4b6e71475b9f649183d498a9a3b4bbe96a408e5a921a24e5c3360deecae. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SEBGA1602225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85a3ee8f077417d780f218a74c6742f89030aec3d52ad8e85c6584103ab534c. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SEBGA1602226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dd8fe1c44f87aa390a922c3402b94a4c7d99ce86f76ba5cb6d568dcfbc8231. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEBGA1602228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbc9530b854ee7e32de9f97014565a7b3a2347922d359a17fe5571db0bc2e38. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/SEBGA1602229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e22bd29484985ba913ecd85ef066cfc410167a33803eabf11dcd1610ad960f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEBGA1602232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ba5845094123f024044928953415e325515b30c6a6de6f2430797f09539b84. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEBGA1602235.