The Sandmen is a Danish rock band that was formed in Copenhagen in 1985. The band broke up in 1995, but was reunited in 2003 on the occasion of the release of the compilation album Beauties and Beasts
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 0x21845df675fb6bf1fffbe3e5fd63bf70bf0be00fa2b47d7f3a40830b3267b2d9. 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/bc36261c-3e63-4b9d-9a2d-79b4678366aa.json and https://artists.proofprofile.net/proofs/artist/bc36261c-3e63-4b9d-9a2d-79b4678366aa.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 0x8520a560a7cd1b207a9dffaa233beb54098882f6faadce4f5ff8995a7ceaea22. 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/DKU361900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5b35f969a13dc0a5ffa446a82704908d1b78bf8ee6cc70fc58279cd2c05e6b. 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/DKU361900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576af7fc239beedcfd370bd1fd30989f0bed5c8c380e5a0b8c46d0ea3c05d99c. 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/DKU361900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca586d80e0500d824d9a50b593e4f61419ae4fd4a02c41ce14d049419b54a7f. 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/DKU361900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0820e3547a9b7df2bbc06e674bd4c4682ff702bb729857e81babc879dc040745. 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/DKABA0701046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fcb8b87002dbe7fa2a609ba890bf93b76178a40cc2932d95428e39169058c1. 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/DKABA0701048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5821bd66029a2db4081e981040b50f7e777507313e42c8e5b410a09283198. 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/DKABA0701051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab47f1e68469d8d8ac58496dcc05eabe4171bc9a9b6d94bb9c43995774a3fa9c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SELAA9100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd579274d197d8e83baf42a970f9a43d88e864a78aa496f45c5eeda977845eaf7. 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/SELAA9100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077fa12ccf4f92fd1a6c8ae53249f92f0d4639e29b0aedd2d4b93c0d4f8ec38f. 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/SELAA9100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8b4eabf003ebad59f38196c6a58a1640976eee3e621f675e0e15ff2d3e0807. 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/SELAA0600602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d84fea3ce7b462bc060d87442abd6e9f9c00ec370e1951f2b7532adf43dbb4. 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/SELAA0600603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe4722370d6a19955f3bb5d1594633101fef76f4c8216b346121062ec9d16b2. 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/SELAA0600601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97c92a1d097de50e751b8433db946921d1be22d4fdf76567be2e7838eaea1a. 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/SELAA0600604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b65ea89bc8de170904edfc8f99ba9383024c95ef5bb546f48a5fff0cb31761. 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/SELAA0600606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca86efa54ccfd90752a6aec5b1fe1d806f7aec1970edeed66615c5e9b1890dfb. 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/SELAA0600610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb0614c8d46b4348ab01d4f8e7f39a3d1095ac333b5fe52944c3bea6ddec880. 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/DKABA0600657.