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 0x16c11223bd5dd9801fa57325893d662be1f435de35e28b060fb51ae20ee7c8ae. 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/85ce6510-e5de-4466-a433-c6a57376a3a7.json and https://artists.proofprofile.net/proofs/artist/85ce6510-e5de-4466-a433-c6a57376a3a7.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 0xe623b5f8067f0d7c1f57a50548f5f97d209a71cc85f414cee13bd2e8d5559a78. 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/TCAEP2032124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c45270bdb103680af3d59814c9497e070e942fbff0805acac04c375a387cba2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCAEW2057405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8ae097a9e02c02d5b4f3858299d85add1011a99430df1ac50cd1bd4dbe4b52. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAFB2052256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1db47b34e1092f5b35e67c7cc8d53ab5f62c5d39c244a595319f139f368139. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFH2090378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae84053389e0b2ee585a7b42921a9fdf23c72f978ce0ca9c2eb58ef0c63b583. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/TCAFO2154050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc97e75ec60082aeda2d3c5ca938267edb8deb65a53e282a9a91e82e6fbd57. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGE2273003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6ec7639c095fecf79c1e29f05f89edc15e03a46df7a6b5f14bdd621a578838. 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/TCAGK2245636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1322a2329d4e36a04fe5630fbc69677151fc0e522cdf120ffa0dcbe7d4634d8d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAGQ2288745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36812d7f3a040e8ff214ffcbfcd0f8aa5af219f775535d919a3fd8343a757f3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHA2338883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f362a4f74bc337e75d71bc6a049d820810026b6a72da182e9d7887182d51b07. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHC2377167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1250d79a8f2c067434cbd9881e307c66215b6c267bae41bea6138ec71afb18d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAHI2301986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9d9a78c8bd2f3f19417301efa6a83b7a40a94eef7ef9952d7cb9b202c97cbe. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAHN2398925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf74085043fe0ef6495628dbcac1dd7b77db779d1166aab32d9dc9efe04442b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHU2468070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d4ba9153ba23ec16683138dce7dba7a79ed46d0211b0dc2c4bbdb7e97538e9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHN72456013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e1c2bf2d3267b3d2d920005a0fdafced850cf6e569e0f51e15b6c4c0ae2b7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIG2438409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72378c87a824df2cb1e4a4f2fa62452dd196e1a071f18be5caa5ab4226a01bc. 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/TCAIG2438573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39551793162fdc8a838d7ca607990233640de9ad804ae59b4d2e3939addf88d1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIG2438717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7782ee813a3ec05b16ce07bc4724ff4dd4aace4a3673fbd34dc872b0a82365c. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/TCAIG2439244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb592dbf08df6c47ec3f14862d5cef3c23f4b5fecab0acb8d161dc02958ec36. 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/TCAIH2438940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0a09fd5a1111798d52f8c1b3307d41c7a0dd8de084ff3ea3010934314466f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIR2413927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3aebf790dc4a0690dd50224f5d124d5827b44ffc02c6cfc7c8bbcc2e1bceed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJE2529615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fab7a463b8724af69ad41871f3fc6bc842b6aa71a8e43346e7962debcf8c484. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAJG2552652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2511d1d7f1bf8eb48cf03e3db6981631ba39edd794d5fa099cf90ce395b4c4. 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/TCAJX2547390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aa96ea9a0266fab6bec16b6ab8b2062a4842aaea353d2772ab3ce8bf097c44. 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/TCAJX2547410.