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 0x5a5d3b20eb23bc0ede646c11968188ae97ff942f1c5ee84810902b33340e8a8e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66eaf7b5-1738-450b-9e02-af5d0e09c7e0.json and https://artists.proofprofile.net/proofs/artist/66eaf7b5-1738-450b-9e02-af5d0e09c7e0.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 0x2e59fe394cb60d7ed3b91c38665ad8027e538a26af0d09db6eaed85eb47c0b6f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:41:11Z), 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/QZZ7R2516790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602e700331ef1c89935ba064f55ba12c4b0efb942db2afcdc0e54139fbe20d4f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7R2561812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea22f9f675a59331e3f7888c0d121cc8afcd17c92fb506839763792eb812fd0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7R2561835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e21d9d56a9438cdc80673e71f4a8cbcac72f7255eb2c51869d8ebd6cb9e08. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:24:22Z), 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/QZZ7S2506825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc017a25749c5cd1db4a6126dbde86e7ee0f174caf9a20c9c763c25d2cbcfbbff. 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/QZZ7S2509229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de0dcdc7aed206ad647cb6ae705eae93f4def33724352836b8df19a463dedd6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7S2506828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03109b768c24b22659b618db05ef820a9a981ac664a62af42b173092ef79f3b0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7W2559649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6be1daa5c447a7e44f2643b4307ec084bbaca9679b0d58a1e59da4fc3020d63. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7X2578857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9535d6c765b341e025d2a6570870bfecfa811deee71d5e1bfe2922fdb4095f78. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F52556902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4480b6b69a3c765fcd4a2dd57f664b7f6befe9579800e10c451c73b7a4fc24cf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT3F92566892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039ac29734355b0fd5530dfcd21e78063954a95a1dd17c4a803d40b9844f686. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FA2542955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c38e3d41ed62eb3b21e3f1c591b97bfb99b61798ce30a67d76abc0ca9ddf151. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3FA2587876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e838db8f0d31e83c2a6a45aa7462eee9c17572e07131f33ff002faf7420da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:09Z), 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/QT3FD2501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d6df9a8a8fb67e2dc1230a1169709612e0b560f2b2d9aea873df8db1207f6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3FF2545321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8016e88933d7a138de8f41dbd55dea2c52e6a062036e372bc70cdf72a6f5fe0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:56:07Z), 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/QT6E62551874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab39ee0dda361de2ef1cfe62c3f4b96408b4e7815745f227e7a2f81c0154148. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QT6E92589376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd7aa2a859cd61bef38badfa69a03e99ce449cc67b38c443ad2058f905b18f4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT6EA2589141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c7b835a5bc07433715f143670bee880427c80bacc91b2599c28b7e00c4a2e2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT6EU2588811.