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 0x6ecf0a2004e760b9cf2c3ca4fc2dead67c5926c365a30963cfe84650e63d6a6f. 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/b4a4feca-0b26-480d-a5bf-491f28e944b6.json and https://artists.proofprofile.net/proofs/artist/b4a4feca-0b26-480d-a5bf-491f28e944b6.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 0xd040eb88d77ce7a1ad231dd8c0e0d1535a64e350ed68d1133a79874af403704d. 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/TCJPF1604491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a4b9329770d9df09ee8a9b1201344fd5a32e7fc055c36e4274c1983943a80. 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/TCJPF1604492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efe5288405b3e5071d1e8004eb76cd1444e60dc66bce63ed11a5ce5664eb614. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCJPF1604493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bbec4bd9c78f08ab8d2351df9530435366251e826a66d273bf2d0c20db34a0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:34Z), 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/TCJPF1604495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260aa7ddd1c34633e70f0b9aef044a2b123cc5037b1db570dec522fe46e29a76. 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/JPS809919822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5968c53dc1c3216a7bc9ae230099db8e69d292fa9bfafeb99fa73033722171. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPS809919826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe811bf4b203d6a2de3bf3f939d043c10bde5691468582686e36877602fcd97. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPS809919827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee64ada9201aea23072e7e4401f5e8f552b05c6e374285789f3929fb33b1252c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPS801852350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662a7843eabd728873cd61dff487d73c02f01dbdc5fda63504229953b5b31356. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPS801852351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697b233926c5c78c07a108ebfdff4e9523c65c9da9d25a6f200d5d1dea4834c2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:34:15Z), 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/JPS801852352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843c0b2962ba7836a602d5302d5bd30922b85873cf9ac89b14c114d90abe7be6. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/JPS801852353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed415698972bfc45aeb1b6134348e9386b47f0cbc10bca8f88f3f56ec1cbd14b. 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/JPS801852354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46a6be5ba1edd40f66ae489f7b27c53f0d913feefeaf46c511289da61e1550c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPS802353980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f3834a8c0be5edfbb6a5940aaf53a31729cdbcd70fdb8193fb15705b683618. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPS802355299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a897b5f70edc8ed85bf54916544b4050338c7483e18756a3b5066db8d88d63f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPS802356882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b79a50554fa9637c43e3b70148b1e8775f7aa11d99337194a890f0e36114f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPS802356883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3919aa75204b6b90a7377b27a0959603c649f073a3f49a7e968eb45ee0a1470f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPS802356885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c41984e1e72961c5699b6ff37610a580f4bf14e371876a79ba66ba0432ba837. 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/JPS802356886.