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 0x8d32435c41449c87053fbf3f47aa302f3d5fad69bf94bfddd01b36e3e408bd80. 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/f47225e0-1c19-4e57-9b22-1ac939f24352.json and https://artists.proofprofile.net/proofs/artist/f47225e0-1c19-4e57-9b22-1ac939f24352.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 0x5eca7908b1502885aef5040c7f8bdad68ff8b482f7abb066e53cf70e0755ff5e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DELJ81897220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1962cf79b42a27a8dc05ef485f70bb12ca0adff7433114679781bff2099ed804. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DELJ81897222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11feeced1ef8b63d40aa3ba5f16bf4662d22e27584561cb24653b7901b0821e6. 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/DELJ81897225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7b0cc8c7d779f3c555a4e3e861a8ac96358c6957aaec89f28891271a4df0f. 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/DELJ81897228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af1c217ce21930c6e5471aa474ec287d1cb8aded67d3461feb62c584c550f14. 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/DEVX52000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b423a547192c23cf2d2f22be66c49411380ea85568d75b04323ba87da0c72a. 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/DEVX52000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889b22437aa19232160d73ffbc3870ba11a89c3fe5cf8a9fa7a0157625b6218e. 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/DEVX52000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7994d7bae001a5bee5d9cf72f3fb8ee3e58721e28fff46ff7104e114cc7e0c0f. 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/DEVX52000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb13cb1d020326771cb79c6a3de72514968f88a97ba5431b479b230d1e1b85c3. 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/DEVX52000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc7b5758a9e796ef9139e6895117505eea1822bfa8ab2c517bf2c44dccdb130. 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/DEVX52000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f91596fc08c80ba865071aca4c4b2eb25b460c43fde80c91e9f904889178e7f. 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/DEVX52000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd240c6c950327c709753bfbe8932837098fee3e50ddc94ee3aabcf0d2328d318. 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/DEVX52000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9010f6c1cce49d98d8a783d4035d5fe102bf0d9afc42a3ac2f003fc0328e67a2. 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/DEVX52000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042864464fc4a063179d904085432d6bcc74b74ad51ddde9aed3b8ab5045cdf. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DEVX52300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f03a7706e43d706ef26e94b83f021cf3edf474aa020f531aa3eaa2dfe1344. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEVX52300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042864464fc4a063179d904085432d6bcc74b74ad51ddde9aed3b8ab5045cdf. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/DEVX52300135.
Kümmerling on ICE (feat. Kilian437, Jonzon, Grzegorz, KKuba102 & Papke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c32e1f0e94549ab88846df43173c3a6e2b4920633beaf227d08f12d9ed2f493. 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/DEKF22100898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8492dc5199365cff30d19327534e0d64aae63489477457dc18bff3f50124760. 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/PLF241906648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3a3ae4d349ddfa040f04bd49b6780337e5a1457b3160e30ea086bd21c74a3. 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/PLF242007477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443c4ef4e33b4f9471801e9734212b6d1ffb9d5201b695d04bd9af1b9b07d330. 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/PLF241906429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d8e1df65a02c6d276d69ead2028de5a52be35e975ff1de83df109fc66cb077. 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/PLC062506770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb179532892fd558980fcf08b7353981e8d1d5bee5317445037c9c03f3c23aa2. 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/CH7812345763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6467818324d1c30640b92b3596660b3b9ce5ff9cfac1dd1351856209409d5fe. 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/DELJ81758352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dddcb3d9e1f84ec2d9f13582079cee93e7733f47bea274e66aed5fba52b780. 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/DELJ81752076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c4267e588a3652dfb528db6086565add681fde2cde0f0d30545dad73684384. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEVX52400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6f55deb964c19687780371a402b32d24146882adca0222c3bd8d4f9d0a3d2. 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/DEVY82000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6f55deb964c19687780371a402b32d24146882adca0222c3bd8d4f9d0a3d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEVY82000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939b80ed2d1e6f9888855026b1419644f8fae245768819cef96564c6b15a69a. 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/DELJ82014969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee472f183bb141f50a33588c9231c3e29830025c7b753d9bf5d5bf6ac8a5586. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PLT611700013.
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 0xe813937968f55a0fb71273a1b51bc01d9c2188d34e7650acaecf482fd84232f6. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR2X41723871.