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 0x198bd06b667cfe6b32af79792b4c4a05b1789cebb887e2e671d05a72a94cff34. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f184c44-d635-4a55-8e1c-1af787aaac76.json and https://artists.proofprofile.net/proofs/artist/5f184c44-d635-4a55-8e1c-1af787aaac76.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 0x9465415de95d7363c1af650b4fd5c5c37cd342f4b49aae88ab290b673ebf27d5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/LTE361900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4313c484fdc9040a0c65862278172f3c464aa0749ef828256d2e2fb8376002dd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:47Z), 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/LTE361900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8557153d62b99af3ff882b038aace7d8935015c1e7c70d8008cc80571a75a2a6. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/LTE362200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4103877465f631595a1149a5de5e07945f0337224c3fe90030a3be06b3bdb1d. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/LTF082500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108a5a67f73140a924b669efd2be913b392fdf9bb4fee2eaa4ccc30c95b43f53. 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/LTF082500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8d206a89d381fb86eb3b2a69fbd66c818a8bb9227b5f5d5b5ceebd2bf10d1e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/LTF082500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e8402ccb8e2021270589901b04e899a356b8c9a536d575f381c313daedde79. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/LTF082500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4103877465f631595a1149a5de5e07945f0337224c3fe90030a3be06b3bdb1d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/LTF082500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d58704007cb4bf017056aecb5418aedb1f38c4a672194149f4d131405f7b624. 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/LTF082500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487d4c648b53bd2bb164633e84a1121c211d0c3d7b29772829fec87fb976de1d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/LTF082500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bc0ae8cf4f3733c1f89ba38fbec8cfff98a852069d26a86d118190db59a4c0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:14Z), 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/LTF082500009.
Už ežero ugnys dega (Lithuanian Ancient Folk Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762695ee48747dd1b2111195051dbc26d1464747c81f942cc43f83a15f30db7f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/LTE361900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd5f13deafb0e1f7370c2f434c01e1c213a14cdcc488211d97d906d171cf861. 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/QZMEM2308243.