thumb|250px|Hasse & Tage in 1959. Hasse & Tage () were a popular Swedish comedy duo featuring Hans "Hasse" Alfredson and Tage Danielsson. They are sometimes known as Hasseåtage, a spelling created by
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 0x8443e5239fd5d99c92a1678c8d481e28d3d52b4da713a146e5d45fb5c7156291. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75715d1f-75ce-4167-98c8-7bdbb2e08eed.json and https://artists.proofprofile.net/proofs/artist/75715d1f-75ce-4167-98c8-7bdbb2e08eed.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 0x1b2092259dea371eb7a45e09fc0bff5b2fc5c0a9100c81bbb198f6fb169477f3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEAZF9232160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494204cad44bd2c7a9a0004df9d0a8af74849af244f013a77d30ef0900841aa. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SEUM70801654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa720fdb571046132f4a3d3e8a6b2d2eaf62093355c9b4ddd98c07c9b2012924d. 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/SEUM70801558.
Under Dubbelgöken - Liten lunchrevy på Berns med Hasse & Tage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24274dcc1513de2bdf319dcb72cd8446f28a42ed62b8b5b62b0a71178ba7b805. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SEUM70801709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bc401edf05bc6f01321725b4a2e617a0d3fd401b86984ea8ce57c0c25ce1aa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SEAZF8001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a628aeb83c37f627156cf8c4538ca37063cb599b2f7addbac812385416730c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEUM70801717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa945fa2a063b77a47b8027af7a2d946a46107731296b6be2437a7b0140ff73c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/SEUM70801720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b9e3ce7339425ebe00be735d3f365ee1d8a63536eb46c1ce99fb2a5ecd09d4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEUM70801722.
Lindeman på nya äventyr bland älgar och isbjörnar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c47ae67f180c1fcd20c8c8791105e450112d0efaff9e0fdfef48842021a9f7. 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/SEAZF7002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac3e3f46e71174861d2662100c69161480711bbe5f580be9b4a5188c97fc72. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SEAZF7601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2669e41d2c6f36830c21e238a6da2dcd10cdfddd01497d4ce5f7d82521acc97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEAZF7301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c67d8b34d255cc95326915a8c68abdd82f6f37c4e54eb4ec8322edf6a4caf8. 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/SEAZF6901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bc401edf05bc6f01321725b4a2e617a0d3fd401b86984ea8ce57c0c25ce1aa. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SEAZF8001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7d17b0b0b35ce1668344bb820362edf5ad183e0ce88d31d3cf763064ce17f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEAZF7601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1923d0d72e2e84dd73b913f8e77e15cbdc9962fa020a4c00596391b269cc818b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SEAZF7002050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874f202321597b3d20c372ded3acc7e8f2d42c1e866cc0ca691c56aa1ab14b4d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SEAZF7301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0675848201a685f07dab94d26e49f5e498edd78fa70865b733cd9ea927fa2d. 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/SEAZF6601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0f24ffb6c201c312056d0330c86c788fb796d63bb11737381c8c51ea3f1acd. 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/SEAZF6201010.