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 0xfbc68355abd44599c1c54c8676e84409f1f72164c21d877d76fde0efc79ad7c2. 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/f3a05eec-bb41-49e3-a920-0c99512cfbfc.json and https://artists.proofprofile.net/proofs/artist/f3a05eec-bb41-49e3-a920-0c99512cfbfc.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 0x103de4fb03950f1fb4a6014f0bfebd659b4361b08374d56c44ced9290009d4c5. 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/US4KH1355203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac15b66c040ebce3e4cf524ef95aa30a3e3ddc0823dd7d1be125dd47ec8b387d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US4KH1355208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cb0b8e8812c21d64ac396e2f80f0276402696f5a790cd0cfb612183d07bc1b. 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/US4KH1355210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbc40ea4d466e2ae1460650584c5dde054075152062ac5f57545d309eb5b3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US4KH1959301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbc40ea4d466e2ae1460650584c5dde054075152062ac5f57545d309eb5b3f. 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/US4KH1959301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6923e5602cb5383a0f0959c2aecd1f6d0dd2d59d51d751b9a3c3ea7c9320a727. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US4KH1959302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460de016fd665631e98622c97a013ff759155eeb1893c2f4807956235422e6a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US4KH1959303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f152b6af14c70301c531e7412d6077617cb949f84ec12d99bb660d5c3e011. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/US4KH1959305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ab3a38794559a3ced1f551e859790a5233f980a9fa57bec6509b1d39f7f901. 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/US4KH1959306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13029aedbb8eb9ef038a58fa023844c1cf88d18712a286d8e29228ea951e0488. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/US4KH1959308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a34390e317b8ab681a0ca5d740cecc2a791039ad767e89c44886f999cbc981. 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/US4KH1959310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d40b9ce6067649574b0166ed339c1196082186fd17fe67338306c271eee7f. 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/US4KH2060401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874086ee22dfb632e6cff3b5f7871cad06b7d11c25ae19d354a0b41adf02a4ab. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/US4KH2262201.
Lost Among Stars (feat. Linnéa Lindwall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d663c3e5b037423ceacd138d0b8c9ed0d743251997f69920bec383d664db589. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US4KH2262203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6535568eb01b602f6b0bc0d5cd1f6c9cd6639d5df324abeda6e79259474b66a9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/US4KH2262206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54519fb3922afaf4ac0eba8263d49a892a2cacfecd0c5fb3260f2a211632983b. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/US4KH2262207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035f2e4a105e0a8b3c2edfc9e7c0917016937b0318fa7ec19bf044242507cfc9. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/US4KH2464001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19067d37292a4ac3fbf9755516f9a64ebef6f99d8ebe7990a8949034175bc76e. 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/GBSXS2100102.