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 0x144a115ce1711bb9860f5c9051ef945413db6f909c3bb51fb66248688ce53847. 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/38926d23-05c1-428d-94a8-d032aaa8003b.json and https://artists.proofprofile.net/proofs/artist/38926d23-05c1-428d-94a8-d032aaa8003b.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 0x4bc5755446ab0362715d17046d4fcd40819fb5e5c99690920d2cbc2c1550237a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFK2437169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f98df52da2122c1e2595664d4abc078e84cc01f67ad1d6f22fcfa574c900bb4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFK2437175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61e4b633caac1e4c5503d74e0e449793b44f513393b7a34d02754e05bfd77e0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFW2445795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0361bb1a41fdfdc623f44ee98cdee5a311a434c9bb8155f9ef2308750fd361cb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:33Z), 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/QZWFW2445796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ec13471cbbe2bba42ffc289c11ede909b0a85f9bbb26ee4a425c340192326. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFW2445797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64881ba000da8df1e244ce9f14bc6905356ed4eb3fe7cfe28750e4608567b0b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3F22478225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb68635aee9282f76de214008a1ca1c2c246f51e51ea331ebe29f088ddefdbda. 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/QT3F22478227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3c146892c6cab7bad3c0a1949878993ad5497340c8112d281cc3c3e5fc192. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QT3EY2408155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1a0c8f4d4b245a484ecc2afd8c9ff4c62ffd1c7e39bf5b977dff25eb19e02e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EY2408157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37f8c59009d9b50ee2513f576157f3339cb000d1179e53cf8dfa8dcec9840b. 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/GX3Q92521320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a6c6be6b996f77c25cf70bd24c46eba10ae0c18cc92a6584377d432bb90053. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX3Q92521321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa081357ddbda0d0020a7a8a9dd9c79015c706fddbf42eae1388eef3d4dc048ba. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX3Q92521322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede925e7520d4ebcbcfa30513d92815ea2ae1660f36aee81afecec404967e546. 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/GX3Q92522747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4e74dc72359f0130ce4744e11f01f367473c49363ca045709484351de8fe81. 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/GX3Q92521324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03c0af4fa646fac55f202cbf535b6ba4f94e6184197bb05ea6def921c4515a. 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/QZK6Q2510342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b3301603da6ab3145527e7cdfb8a183d578f6df8bfa096541bec7852bbad5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2539268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a7f5ea851b0489ed6c7142dfccb90537d1a6b1f798dfaf832a8b1d4285b1e8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:33Z), 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/QZK6Q2587711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2632c4c70ff31106367178ee7d90d35e9eaf75abba77a36b3360ba01686e7722. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:10Z), 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/QZPLS2557968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21375252f15b19737068d45e8b57e4ab2591d014ed7b1dc22b349ba06431aa95. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLS2557969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ac097d8a0050e2284281bb2b38294ea01b10652fea9a98f3de2527725ef7e4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB82526072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64edbf96b260b687c0c01c67868457e79d3605d212592fe1de4e90ef88e8140. 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/QZZ7S2585974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bbb328f81833d2871fbba3b0979babf274e301a1f2d52bd97245aeb2dcbba3. 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/QZZ7R2574074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1710e26e3900c944e860cae8306d66ed8d41c1f38d79c4308e1880bbe8730f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7P2554732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d3ed2c10162ca6229f3473b1d4bfa6d63db813cb76f87d6a418d8fb444cbac. 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/QT3F62528295.