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 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 0x047d2c6264af89a06bc6ea7ef80ec424dc7ceea6f956ebdc5dffe582a5ff84e8. 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/47ddf161-387c-4a87-9535-c73358e592c3.json and https://artists.proofprofile.net/proofs/artist/47ddf161-387c-4a87-9535-c73358e592c3.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 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 0xa34c9e8eed3436bc6d971a6b196a854de9edb16e71e99a9699de853411d975eb. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USDPK1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a766f30c7bf2e4318958100d2bc642c409e50ed16cab45565af33d1c2fb98ec. 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/USDPK1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180303d7e569389a91c381c9094a9c526287ac2966126b79b49f33d339d720f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZV5T2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8fff13db81e6b0c36fb2417a010685b0415978cbe4dfd89c3c2068698baf6b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZV5T2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed36198f64cedaf94ca33991e41795b9fa2b812a4c2ffd2cec343feff382d55b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZV5T2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a93d6713ba8e9ac1523c3897d368b1b7cb7c44dabbc3548714a92c425899bae. 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/GBHLW2400817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539581f88bb5e820908f628fffe0afd900a90db1a48a633d622b70ef3c82b39a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZEC2319047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9b8c440c4bd36d70d5157edc956583391d148ebe2384991da94b9676fe500. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBHLW2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00545b19ee38710a720be28ca9d44cd6a50e924e158b9c7ba42914ce57019d9d. 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/GBHLW2400813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336e0cd84150c55b8fe3d6162759d677e4bcbeb2fb6ab921a42934aa5893750. 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/GBHLW2400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6110c258cdd517878ba042624d71b32d917ffaeb64679af8c11306c9f1a1d8a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBHLW2400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a93d6713ba8e9ac1523c3897d368b1b7cb7c44dabbc3548714a92c425899bae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBHLW2400817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df269dbc5389cb98a602072ecc429009013e6da856ae3473b78cd68527cd3b5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBHLW2402112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912a2d18f735abe52892c462ae47fd826d501498fc0be7391d4c3332896f8f2. 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/GBHLW2402113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6438a660eecd2d14b6d8e9664e668943f0c25fc13f7c281ea0fc6e158fcee54d. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/GBHLW2500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7ff3dc67a5ce425b35f44d610273cdcccbb7b928c9c772dd524ff96aae0731. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBHLW2500996.