thumb|upright=1.35|Grand opening of the first Dada exhibition: International Dada Fair, Berlin, 5 June 1920. The central figure hanging from the ceiling is an effigy of a German officer with a pig's h
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 0xd09dd33d3a99175a03467627cb616c9b22af1b61f74946945ce67c66a5dd6fc7. 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/95513684-ea37-4fce-8240-62f689135c63.json and https://artists.proofprofile.net/proofs/artist/95513684-ea37-4fce-8240-62f689135c63.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 0x07c80f528a2ecbc4df9b34238650f46902a4e5a9313cf2e5855532be9414cb1a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPP2125639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e744588ae4763d88c78ddfbf0dd1634c7ee9114d76de5313ac450b4de8df0f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:32Z), 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/TCJPP2174142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf63f9c25cfacec8c28dfd349a120fa532632411c2248717517b7859182b9887. 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/TCJPP2174155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe9f70b08a0a259ea1364fb1933a3a69b6a2796bdac8d5e6a8b9e0a185fa3ee. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCJPP2174159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e7771dd11c6ae52344a5e1b017d43fb015f3d9170c919cd5ae41571382864b. 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/TCJPS2252287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8fcb133ea0f4a09b191ca8a73d7a8612d7424400d1fc70c2e5df7ad09a32e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCJPS2252338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2c88601e4a95cecff58762ce2df88bb6fbe869c1912737035cca94ef59734. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:00Z), 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/TCJPY2474318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42d42a74de56d06876f0f83a7475a7a88c5af98538d7e0eaebbdcf1840622d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPWP02400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5babcdb8d66f543618c252fa6fe30ed6d9658a3ae31c6e7f41ce8fde3369e0c4. 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/JPX602300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5c4c2fa8ec8aa1665d0ac438a1df9fdf8d6a023bd144e88f338007164a2aca. 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/TCJPZ2434284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9f24b0d6d82e22f1d780de10d3ed644928753018af04efd2c6f3413a2b16a4. 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/JPX602200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a741a4aa65a03adc7d9f08ec2c055f0390f4cc226c5e7d55fb402f1a073e742. 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/TCJPY2316085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe9e969a722c3611542f3ed97f6b82d34059cde980a30f7330259e4a07dddbe. 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/TCJPY2360384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db4f05f599580598afeff5cfca3072788b974d3d7ae0a6ce5e5ae2ab43eae5b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCJPB2426274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a189d9885057913f3352aab89b350263aff2e95f9c0a7cff7012006c0346fe1. 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/TCJPA2420068.
Manhattan Records Presents (DJ KANJI MIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff7bd4ec2b11225f3784fa839096bc1e27d07b3f8505a0f4517daab36b0b68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPM591001510.
GO (feat. LANA, DADA & Masayoshi Iimori)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2ff2bbf218907a904ef56dd1970e38bfb611387c9e1aaacd58de8ce4daaa9. 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/TCJPX2353179.