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 0x1ae6bce4b97fa28564e425a5f017da9369537a462f1049e4154a53f666ae8cba. 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/fd885ede-6518-4468-9f99-57f8137b277a.json and https://artists.proofprofile.net/proofs/artist/fd885ede-6518-4468-9f99-57f8137b277a.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 0x0c1a7d442a5ac91b35b8557b64d6c3fadf52b330e84584aab236a0532823aa03. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USCGH2202762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d9f82fd54c62e69f7f1d95ac85d1901b9c0ab76a0ac2a6330efdbc26be3ba0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM82217606.
Gertrude's Ghost: The Haunting of Hafenklang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe23d5fb135dfa7a3917c95d9d0dab89e3bde109128ec603bdb41d2eeae53f2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMBZ91918019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0cb3cd7b35cfe3d0dbd992d13473b4eb30e64e65461337acb5a99cea203e4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMBZ91918021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d080597114e5fe29d056ed6ce8f5f4f683ea43bee0af3b538c3bdc1045fa9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMBZ91918022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3ea7b56b4a07e8e5f2d454837d2c33bf32bf0df77ce2abe77dea81c79cb8f3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMBZ91918023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654de9be92ca6d2064f0bb9363643f74caf4d2a2c1a68d775acfbcc2bf878efb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM4TX2000479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20db0a27c5884722e37c84331193fe1a61f14db00d2cb41d485480f55ed725a5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM4TX2000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d5e63d43aca47c66e1bcd486b6fef63db4a88a09543967254feedab428a158. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USCGJ2454670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c6cc8505bde2792ff90e3b360826a2f366f2a909809630acb3bf17fe17180a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USCGJ2458466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8923146c2afca1e2099753dcf0ddad472603f0da88e370b69023b64241fd3d. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/USCGJ2463768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877032d483365585ae70ac18c48898f75404ab9f1fd9c8c3976937615fb708e9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGJ2463771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c13fc6a3663e85e7b30da6b468555f1fc74b96ad655100de3bc2909bf27c0a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USL4Q2415430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc48734c702a8d0a1621790e6f3797fc0c9e9480cdc5169d368a8770eeb2df. 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/USL4Q2417296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11318f164ce10fc45a276b6a34b593468aeca89382a434b72215271c7ca98072. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USL4Q2476022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6106efcbbe8ac73a5de987c1952fe2ed973ac6fba28c8f227ff4c9d6eaae45f0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QT3TB2417215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91193344ac33ea774a5b3c03c86c55207c2b2b1999a712d409f8de6699f28b47. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USCGH2541605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b1b163e7679bb80cc289253ade1c060462c89054fec5917362530efb7906f9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USCGH2541606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0545661b29e153aff9af577646c1c67bbf7cc1f9f40d90ce131edf4414753d2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH2541607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13ddbf2fc787ac6438b98a401b79073aa1b43b0cb5fd63a8d2328b918b5dce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGH2541608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68270b00dee4af08232d0f5190376db9bef8513442ba49b148bd61886c99c9a0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGH2541609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184987d312c627ab9facec47228413d8809e3a967e803eb6134a9731abfce0a. 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/USCGH2541610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c76f5d64ceb5bcf9fd6121843b9f559d56debf28fae4812d9d51fd7730d4c. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USCGH2541611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5615353d8be4f2875fe93f155f4a4df84a0e6f3028d69b1d473ebe30af1b497f. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/USCGH2541613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb3d30fbb2fd2912498b04236d523f10bbd9958d5a3c88a154d0e22ecdcc245. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USCGH2541614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d249cb1413a0afa50c07c13dd648f2b1865dca51f734dd2feccf459ffb2813e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USCGH2541615.