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 0xdc788385aa2c61290899bd972eb7f1505efc6e0ea9e095940b091dec6a743609. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/670d6407-759a-479b-8785-31bc9f62d12b.json and https://artists.proofprofile.net/proofs/artist/670d6407-759a-479b-8785-31bc9f62d12b.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 0x35848c1b58d84194cf7d30c4bf23a9ef074c72766db2b171844dc0db9b0491f2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPY252100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c42ed7fd8a71e95ccc5b44686970115751fbc06b9ed28ad4a6fb9ce688e514. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPY252100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acdcaee65c9c9767704fd6cd36604654853443f4a44bf5323924c8ea93c8120. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPY252200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c15dac1b492b923da147ef286adc82ed22a3b1a3ffff73a8f90c0cfe2e77e77. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPY252200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c3e1d20fca356b67e9caa7d5858f8e1e611f33ffd138b715fc27c7f23e143. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPY252200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9276fed825910ff496d25e877459312f94299ab92a25d923bfee8e3bab08f9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPY252200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c639068180d81a152391ccb304c96485aa2cb5925f8b67bc56e91e60d21779e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPY252400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8c1d432551ee59b7b4a38ea9fbf8a18b826b0c91ea7634e7b4bf1552761b37. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPY252400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45036713832396293bbefa692e3f4bf6c3d5beea8bd828cd4b57421ce2558c0b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:57:52Z), 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/JPY252500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc116541656119b78fa665f1744f481d0b01673326eb8c71efaf40932ed5468. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/JPY252500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf907042757cae1a4cea1d854f2e23552d8e9d66758c07b4796a8a09e95c4d2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:57:49Z), 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/JPY252500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bca1095b23d91176119cfc03a514c8040206f60ff5b3983f0d0263d8293ff7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPY252500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76830445c04550d02bf35a15a561964d5ddcdadf344414d784e7a012e3b8918f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPY252500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1400521478ee5946b3671ed968a5e7ed28f8f0e38643eb2fc18ad68563f19dda. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPY252500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad9442f9c5b17c26a883bf85718f37c6c980b435728798d9a15b3e48b1ee39. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPY252500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d200317d562e51ccefa1de17040f371c00d7a5b0df880973b8c8e550c66a7b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPY252500076.