thumb|Sølvguttene performing at Torstein Grythes (founder of the choir) funeral in 2009. Sølvguttene ("The Silver Boys") is a boys' choir founded by Torstein Grythe in June, 1940. He held the position
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 0x82e6bd33072c0656f5c6c28187fb51679032840737520eed253b8afcb8afbd88. 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/60a335f9-643f-4c05-b4a4-6278f7d3d9ad.json and https://artists.proofprofile.net/proofs/artist/60a335f9-643f-4c05-b4a4-6278f7d3d9ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sølvguttene synger julen inn [2012 Remaster]
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 0x56618510ecdb5d80091732e8930d12210fa4b65fc874aab461c3c43fe58ce5e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOX9X3562217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d4ed6c2aa0d6d895c87a9cbf2b7f3a3a42437226ab113f3f354e65bba1196. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NOX9X3573617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d17f2eedb56cb699560578e2e3c893eaeaf73e789bde59cf103d87b57b4e285. 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/NOAMM0500443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6915a4ca3b87fbd99e7376d031ca255a8a071f1773faa6710f69a8a9824330f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOAMM0500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d276fafe9d9e6564c4f17ba0337d6abcd59478d18d21b547a1760568851e065. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOAMM0500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a7b4aab165e2a80c625ebd2af9e1209292927d253405490267fc91dd8fc8d. 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/NOAMM0500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0523ed58a882cbc76bacee38b729e8d654ba07463cc37eee8da95e6b70ceec5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOAMM0500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03db94f2fa7512edd77a9fec86dd7e11c49fbe65a1c9c21cf1632e210c8035da. 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/NOAMM0500455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5ba765eb9a6b94c59c0e9e8900843ac4a2aa610c79f4680a5d7c8ebbf1eeb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOAMM0500458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86150be5974f7c4f80cfc69c325bf46305d435a002fa9691dbfe42d05bf88540. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOAMM0500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674318e8ea1807202a9cf6a746e7adc0f130fbb1b4db4a975629a8e5d98361e6. 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/NOAMM0500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ca62118e89fef6c273565c6ad644ae52dc4d84671caa6f53cbba381e947b6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NOAMM0300799.
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 0xa828d70dee5b21da01a8dc061eb986acddd36d7ce8b8ee482460e067c7560ce1. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/NOAMM0500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6460d03c826592601591f8e969077aefe10cdfd83893d7d2ebb755a1d050e708. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NOAMM0500447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1f696438a35771f4f7288401bf28e6a54ae9017cc09a8456b92798025609d6. 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/NOAMM0500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d8c5d58a2b5ca4d4d604ac2f7a008cae708fb18de3d19cb49d8534fe6c40f3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NOAMM0500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac003dded96dfd027db48a260b5e136781be4ed401e487f5f8ed6bb280fed34. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NOAMM0500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f9c1e9d91bfce3a1c62cb61e2fa6c6aa069540a5ea08ee15622c197e66e56b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NOAMM0500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f7e82d2b26782be12cb4be4e74fa5af6e216b85af195e2a06a4dc663d2e6a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NOAMM0500456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5337595d721f7069a83cfea0dea138cc36eb56b594fae45d25e0b3aabb5c4. 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/NOAMM0500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2195eea11cfda1a1db80787275e9243d410371a1b73ef05724688319d678c7a2. 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/NOMPP0610050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2022008c1851a32f6379e05257c644759d2219e9fda7333e32bf40c0cd71196f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NOMPP0610180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeefa83c2c1bc0d368ff78b572f08584804294ddbabe51618a35125c1b0a6f46. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NO2C92503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e317f7dec64e51e17e9b5014a4e679023656e1a2c4895d6786eb3cc1098d2e. 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/NOXPR1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d0b8627464a34e905dbd9345002b5749db36379dbf96490f0effc71506a5f. 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/NOAMM0035017.
Nå har vi vaske golvet - Sanger av Alf Prøysen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9370a8b0a7e755b095a4c4f4e425fc2c4d2df5fe41a7df0e6a5000e0b239880. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NOHEK0307010.