Winter is the coldest and darkest season of the year in temperate and polar climates. It occurs after autumn and before spring, when the hemisphere is oriented away from the Sun as a result of the til
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 0xf2ac1c71848643c7366087de951338cb946268b56172f1142430a85fb239f147. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63bf5244-86ca-4916-a1d8-8566b64239db.json and https://artists.proofprofile.net/proofs/artist/63bf5244-86ca-4916-a1d8-8566b64239db.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 0xd7ad3b2f83c4cdd34fcc3f6341e89bceac8307dafdb023b44db5baa218f768c3. 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/QZK6J2007348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98741ba7dd69e1b1778c250c7df1e941425d565f1264157108a5370f7bfb1dd9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWT2157918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081af96c18ee2954b8b158851d37ae7391bf759416a42f6c91e33ff260b2b85f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAT2190149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4393d893e11e9d52bf8c9a2dc72ca899cc9ee19263237aac0497cda21e2f62e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZNWX2273462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d90bfc2b6c048d67920cdad30bf4efba56eca19ee2ee76fd27a374e49f59cfa. 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/QZNWX2273466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaf0c77160595b28d82b5734ceaf92204ac2e50da133bd8c53d27311b5cc8ed. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWX2273473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091c96de61133c9ee5329f5292c7c408ff581de54a53b9dbb4e21163b01a179a. 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/QZHN52473772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb8e79e4ddad251cc624b70897364880294dee3771ee8c420fb985195e1687e. 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/QZHN72493085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4affddfd19c425df683e45351b0e2bd8d236668d620d8a0b697066120a38430. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN52473776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18e4759accb417c666a990818b089c8feedad08142be816c52c4d1dbce84d2f. 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/QZHN52473779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa876f0e736dc574f686f9c9258a8200a66f17be8630a47bcb98657ee20c6a66a. 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/QZZ7L2446379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a68f9719af96a8938271eca7c0ef431b5f95cf6f3dc24748cdcaa0a58be159. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EX2598461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6d94859dfcf4d3c3d6bbb4ba870dc7544b2f55e33b1e8655f5afcfb0e0cc8. 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/QZTB42233225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2196c2bbdd678f2787d76feaaad752208719750480aeb600136ea8babad8cc. 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/QZTB42233227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7875f38b51e506f30f71e40f1148aaec8b8f1fc290c618d2fb355958f362a1. 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/QZTB42233230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d42335a0d992ff7800663d8cb4df342cc3b1977b7e34ca9c67b849fbaaf91. 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/QZTB42233236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5bb2dde4291beaa2393dada26497887c30625b63252bd78922a8f13377df1f. 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/QZNWZ2419411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f52e2acb43517896f05274e83d6213c0ad2ef1358e68470c210d3dcd6a532. 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/QZHN92406774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec7120999cea18754f3e0c52c3eb30b31b6275d1d3e5cc7aa0944c299225644. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SE6QE2369151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b563f491bb446166ee15883344f659daf7aeb20274971bb5707e1f45e8a0d1. 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/QZK6M2019648.