thumb|Gray wolves communicate by howling Howling is a vocal form of animal communication seen in most canines, particularly wolves, coyotes, foxes, and dogs, as well as cats and some species of monkey
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 0x09976904dbda28102c8350ee255dbc418943817906a9dcb64aaa9ec5eb335328. 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/d225f5c7-54bb-4ad6-aeea-1410b6847ccf.json and https://artists.proofprofile.net/proofs/artist/d225f5c7-54bb-4ad6-aeea-1410b6847ccf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e73983bdb89a19beda7ffd895e91734ec4b5dfa63af3a46555f8d3354fbefd. 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/DEEC31200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9527fa8feca81c54c62b45ac4a564085daf5bda2076b9dd742cc5ab6f6cd9ae. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEEC31700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1b27514b7444f47431b0c701c97a1f635e920645bb5eb2fdc05772cb8fc296. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEOE81510233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd7daac91ed223ab51f61d0a20cd5d762f6fe04fd77e2923a3f10ede2e5aa29. 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/GBCFB2000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12e10e878ee7cabd66515ca7d898fe9eb5cdd03b50ed3e8bde3b3644d579e42. 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/GBCFB2000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc6c5746dc263ebed9eea989a95822009e39c24ea6f2bb0cff18f3fc1cd0ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEXN81889247.
Phases (Toto Chiavetta Colour Two) [Mixed]
Alpine Grooves 12 (Kristallhütte) [DJ Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ff5850f7c039ed6bc4965af14158da1e1505e12c014300817d3b698423405. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742046864.
Signs (Matom Remix) / Kae / Feelmar (Gaspard De La Montagne Remix) / Red Pavement (Halo & Alex Fuente Remix) / Euclides / Two 0 One / Entropy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e975c8be7138c2bdf58a06323c989b13706aca7221be474116f9b3cedb1365. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:50:27Z), 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/GBEXH1500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcec2f03690380b30085e909b30b8389ce97e58bc7a3ee27e4c102c9e4d2ddd4. 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/GBCFB2000444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d509265fe188b0a715826f833d60aa6e8de2dd886d04e292b664b902280030. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEOE81510240.
Journeys - Escape. Sleep. Relax. Repeat. - Season Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36abb34968c728aa9ad0ca9ce5031bb520aff0693a7e8036c7c7456fd25d26d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEOE81510228.
Global Underground: Afterhours 8 (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d333a17157371496e6537e2aaa5ca02592eeaf48a403f57f9b6319f5aad4a4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBHFW1800025.
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 0x25afe06385a4cb91ec820f691403d1a5bf66760923783a8556cc5afafdd87354. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEOE81510241.
Signs - Radioslave & Thomas Gandey / Last Communication Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21cf260858addc814b6b86ad834b229c7a33f66a8d5ae1482f56285dfb3ad1a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEOE81510242.