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 0x140b711943538267edde9a2da0ef1cfac353ff3dcc2fa0c68cbffd3b81950e5f. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/712f80f7-dea2-496c-a4f6-72d02c428be1.json and https://artists.proofprofile.net/proofs/artist/712f80f7-dea2-496c-a4f6-72d02c428be1.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 0x6223b23e9a0f36a1b619a956a046e91ffdad57312e19723ffd2fafed2085ec8a. 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/QZ93L1973950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd957705cde461cbaac11652f89573d7a77093a474e43e5f39c55bf8034351a7. 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/QZMEM2098221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905e2883c07eab7b2a2ff56beb958414ed9669297a4cb39a8d55c0f06ef89263. 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/QZMEM2098223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6520984b58c8682e7bafab971e241436a9cab1775b2f62c8e62874aceac6b3c0. 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/QZK6J2029799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb8d872494a01f6191dabfe201fc47101e0bc982e52a7accbdccd275da02bf3. 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/QZMEM2098224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f59bf13143db2dcf49cba51634ace3a6a2740d430b7ea74e92a9ee2c1a87e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2097861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d4112e98318e03ec52fd17faf79e7c52b2c37f615c96b7e083f13b5b01c9d. 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/QZMEM2098227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fb0b21e0346327d82180c7776f27c903f4a3dcb4292592b35f2c0ac2401b60. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEM2098228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fab7d40b192ea2c7cbcad1e1a1d38f3b13f8199cd435e6af478ebea540198b5. 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/QZMEM2098229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b03494e101c500852863909811b5213f513806cefe3691d4e64a85e9f51399. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6G2033980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6a1d069587d4a88f272448f228ce8b6dc5dfbc846ab3078c57e6d103aa4eb2. 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/QZQX22207579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e7595066301d704dd590052202838979c08e5af1602e3d46d35fce4279fd72. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWY2179225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5736e584bf930e8ea1eeb61f64a58b638dbdd6857482abb45da2ea26655727ac. 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/QZMEN2184722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f59bf13143db2dcf49cba51634ace3a6a2740d430b7ea74e92a9ee2c1a87e6. 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/GBKPL2097861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21689ea64331517a69756fc463ee0405e1c2c5376bbe5872b6bba98973aeab4e. 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/QZFYW2072583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9499f0239191c914ae65b396fac3733b1a29eb09c9b7d8a7e8f9a0c8439cb6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN61912944.