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 0x5bb93dc3ab894433cba7a7da2f14a24500a6976ae357799fb5a36993b7f226a8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1502c067-5b25-4ab9-82c3-f15a3b26e20c.json and https://artists.proofprofile.net/proofs/artist/1502c067-5b25-4ab9-82c3-f15a3b26e20c.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 0x9dba6465be304982d22de82916e39f3e155c7a0ee909aed1a1466fa7a1cb8e98. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEAF41900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd68c413cd276a103c196c832513615722a9afb27a037253eaf2cc2ffc2593. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEAF41900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfb914f3c21cea2c34b4a266695c66dc5b9f538645f642b0eee6c0518a87986. 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/DEAF41900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9db39d05375c0ae19db82948faad0a0f40bbd048969c2cd01b253b472f7316. 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/DEAF41900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b2d60ace4f629fd6ed244ebc9165167d8cb6bd9d777802d49ff94a9a324dd8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:02:27Z), 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/DEAF41900041.
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 0xd781241e631d2c51416d7ca7a005207b2bc9df36f5017ba996c527c29cbb399d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:32:00Z), 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/DEAF41900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c6a591f68d465cc90c0f5db41f218bff4be7fbe71dc6bdf60f142a91e14bb. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DEAF41900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119744fb7efa43d3182583bd3eb063d0b7f6e8d58ecd7515dbc3e461e2812b07. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEAF41900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586f1a123c820de9f1b6819ddff254f7db4be9d4644d206544363efbf71fbc1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEAF41900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c531d6ed20900c240b178f1582c4c75c36cd60af25fc0a5bfa532882755bf05. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEAF41900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622a3a7ae54f9d2584a0159f2dabb0a5fd80323ce85dc90865dcd3f6957f86e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEAF41900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b20dd9ab33e3a6b8c308253ace3a3a03904d86b4efe88047eecc85752b0f22. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEAF41900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3278a980a5b284fe14cd58beb41f88ca96f5ee2ee20cf30f3ff6b2dd83159359. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:12Z), 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/DEAF42200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d2e3ff2dfee17ede98c53ef35e73f4554e85d7546b1a7fbf0c9cd0f0e667cc. 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/DEAF42200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b96029a8f92973ac0106daa2159727719c3ebdd4901545d59aa9d6c413b58e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAF42200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdfbaa5622e66790804622b2e7eb4a1a0a5c38332e8848e38dc805cd8218cbc. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEAF42200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175490ba999a9ceb45999100b9947ec048f38d3af14fd240c4079f80c95cd8b1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEAF42300050.