Daniel Rubin (born July 29, 1985) is a Swiss former professional ice hockey player. Playing career Rubin made his professional debut with EHC Biel playing 41 games in the 2003-04 Swiss League (SL)
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 0xfb31678a7de319d359654885ffadace43fc69cd84950d523acc8577ff09f8299. 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/0553163f-0d66-47ba-8bdf-07751c4e8a69.json and https://artists.proofprofile.net/proofs/artist/0553163f-0d66-47ba-8bdf-07751c4e8a69.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 0x7f634c5298cda25307af87a256fcf1e6809dd21476d75a60949a9ad44cb8a084. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IL1311702454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2271d28e1c251e84a774d4220fe7a8b17b61e755bdcb6c34353fd07f53778b8f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/IL1311702458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa960bb19b164ae002b9ef71151edac360e8b283cd080590c1d8063412090b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1021910795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1fd57949f51ea3be8ac7a9c9df9edd0593d6382979c66fa0532a0d23819321. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/IL1021910952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59dad6696b334a64801b53849727252e43c18cff0da667bc380d11b387704e7. 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/IL1021910953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a74e929b9192c1bbea53dd5c01179debff2080b5a550e64a1de166291bb51c. 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/IL1021910957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e2dea98bdbfa19b65cecc3f08462c8925ca2d9cd86ce063104cc0fc95a0d6. 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/IL1021910959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d59983f06e96c28ead8dc4f657690531e873c2070ec6a00f1b2613ebd64f21. 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/IL1021910871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25923df83571cbf318a2700b39ac00be81d5a95dfa08819fb39bf5ab052460bc. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/IL1412000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7cb52bc9ecf0b6c094b6262f6d3c597a9b5d23e0874eafd56b83b01643ff1. 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/IL7532313194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebce0746ed16bf465e6da3ce3dd9b8f09930d39ad193f3dece5f0d830a89c9e. 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/IL7532213233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116f42b323ee4cd505e633686fff8f870a5bedf659380b0ecdd62163b8dc4a74. 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/IL7532213332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7cb52bc9ecf0b6c094b6262f6d3c597a9b5d23e0874eafd56b83b01643ff1. 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/IL7532313194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c39b7bb111d965ccdedc9f61224251c0d0c89e3fa31ce98d2039b40fd90315. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/IL7532313197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2462a248c8d2b71fa4ed66e0ce751a7d7adcf3a7d0a25574d54d44648e3ec1. 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/IL7532313199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb557164dde7f578128e021d4cc9d319b15d3a4d3725c02b8a509718d340cda. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IL2DY2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66bcc54fbe98df77c239f8fa97a832ea20bd5394907a7b7f65f6afd151692d4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/IL2DY2500487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea64dcbdd7d4973e5e09963f950e76b7724342c30c5f97b23b8df3c53e6bd02. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IL2DY2500379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faad295783dbda972d29871a4ebe5c9169358faf150d4110d31446378b922ab. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IL2DY2500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61612948db2d8b992d2081823d9c680e7e458f5e9d968b2de5d509b547b49e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:43Z), 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/IL2DY2500535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd7d6cc8853804e47edb847e48a0194e966c6d07640cb1d3aa7bac794cbe111. 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/IL2DY2500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bc343e80b7e1e101f10e8a8d907ede6bbed6ec24953732db075ef139405db2. 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/IL7112001286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce56bda907873b779f977e91b389f96471b9e698ae3e2b7bc6b4ff631248af7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1021810653.