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 0x6218e32de67041d67cb7f322667d36a27d43131e8afc1430e5a2564cfac9c8dc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8f2d9dd-3e93-4197-8bd4-4a044fb7c68d.json and https://artists.proofprofile.net/proofs/artist/f8f2d9dd-3e93-4197-8bd4-4a044fb7c68d.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 0x2f81d54cc75e013b95fbe9b7afce6d81af2cc7e2b7d8d16f3e1e61c6a057fcdf. 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/TCJPK2088104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69f846357859d4ef515ff93f8fa02bb585e2aae18c3c2a8dd2f861a702cf6b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPZ2401513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d1a11ac9b42b6aebca9bcc231d4c973c8073805867dbcedd3f3ceb417735b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CACWV1954300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0545cf6c1660dfbae7053da30a9acf3b6fa1f726e195a19ede813306e2199. 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/TCJPK2094368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba24e58d1e99f8e8448e8b28d509d95ca85727a869043cca2b36eb26ea507a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPJ1946890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483541702e16c140ceed485991c932e273699177a8bef3a8e7d712517759c5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPL2027779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e5d448bdd3fa63d095467954deb78cc478a2366ec99a0bbb77b02366c4a0c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCJPK2061023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308342a761f3dc0ae2770b8404abdc24324ddf52c15af05f62f272d65d0a3df. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:17:37Z), 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/TCJPJ1990139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1826341b6ce6c24de240e0f00f09cea03f5cd14de5ecc876e2f5c6879a1e50. 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/TCJPY2484277.
Crystal Clear and Nothing (feat. Kanata.N)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f7ca730830738f124df4181b42d5c6fe73df70863e2fdaa7020a52960ec589. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPI1999313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000472d92cb07b155aa28beebfad72bf083cc1f348a7eb1dd336415f3ebbce87. 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/TCJPX2387274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ebb3baaa7c1e80744d6c0a48785799f944aabaa0ce4ef6a2ba7e50eb4fc600. 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/JPE452400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b8fa0056128e2ccbb29aa584e0c0d3e47e4ad0b85c6bfad7b138ef280a4a91. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCJPH1861044.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ebfd5c86b2f7d0760b4425706008c06b7011365d9dd9999f60208def5d4bb. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCJPK1924013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f2b3f09667e3d603c892e1555838ee1ab7732a83f59017bb40d2b9fb0d895. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCJPJ1989984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22c0c0bcdf9d7eb96b823dde370aa540f823ceb2a2843b5641a9b32cb9772e6. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TCJPS2244281.
Crystal Clear and Nothing [feat. Kanata.N] - Avans Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aabd47eaee3197f083c3a87d0659a3136335a6916559c3f503965172bdd61b8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCJPJ1922394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fd3b0ae96b97950d874a7f1274e28a393f1659dbd308e3a66a715b80901fc7. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/TCJPZ2419961.