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 0x59ad8d952ddf05462334645129d3b75eec09db4fb7bcc36d1fddba461d7d212d. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9653017-fa99-4f8c-95f1-9c5eacb94320.json and https://artists.proofprofile.net/proofs/artist/b9653017-fa99-4f8c-95f1-9c5eacb94320.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 0x49bf3fb5bf7f21743a606263f78360e1ad8241092ff2a883d1a5d8793c89f724. 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/GBBE82256432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076336b829fffdf16bf819564137c17f3871faedbf8597754711c94b3cd95f9f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBBE82462427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc72a70c35ff63b9ef1b7f8e9bb0a54abfeb7fbbdf4edef124360b999862189e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBE82461128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ed7c21148fdbeba2401bae194bc2e7f5c7e82803eca7c697f7de4e55debfe. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBFFM2497930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775f461639e3e6f3fc50b438c4da8ea0a17286f26ebaa7b023e7b493c7ca4887. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBFFM2497931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540706b7ca2679098bf799170ba3468ba863131b40b1b63c24197aca216f9a69. 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/GBFFM2497932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed31d0e20a8a5c60e7e2b1c975fdb0417aba42cd771d9b66fd8471317d93a434. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBFFM2497933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07c4f7cd57284599ca204890975ebaa34181592a6c06be16491beb54666c0e9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFFM2497934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb8b3cf078d78a38b783d3a3024b10f445502921be1dcf17b0e480639bba663. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GBFFM2497935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9257233176561a6e65b5fc4e1cfc2cb771d5492eeafa1336af9444945f5042. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBFFM2497936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6595fde4be11d42070e3a1ac557f8c69fe20a2bb172fbd58ecabb4dec8de184. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBFFM2497937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58a1b3f3c8ea2319b6b4e4bc3e2c64d5574d3320ca5524a80f2aba7798253dd. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZWLL2332555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152195f93db268a7a54a59ec0310dc6ad708ab44c250514aa58be019b3595f47. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEKU72453415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c1a81877f2de250cb605cd75d92fb13bd52da39ec7cb37f13dacf1c668c269. 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/QMEZE1862481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153545d0dad3ac16ecb2a02269c103cf41e653ed7f4eed2b4181ef3c424b9ab3. 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/QMWFJ1300047.