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 0xa3d9e887400af47ff459d20073a93bc0d81d56b85e5d86d094dd959590bcec26. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/139017b8-1fdb-4882-885a-b70e18709f33.json and https://artists.proofprofile.net/proofs/artist/139017b8-1fdb-4882-885a-b70e18709f33.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 0xd7f0dfb0e130462443adb38725a91787673bdb32159e78687f679a2390e6fca0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USTC50818365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330b356e8beb0da606ad1e4759cd415c978e1962b0c2ec91e4d0d03c956fac5c. 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/USTC50818366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e90021269476fa1fd4ab5a43711a2d107b6adb53bdf8ffb169eca1b390abe. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USTC50818370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30904189adc360b463e877f0e0ae01d1d449ee96598fba0cb598c86e62a8562c. 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/USTC50818372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65833bf3e8bfeec12b85111ec8cc9dec80a5d9a9fcda4538ceb56de2deeaab25. 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/USTC50818384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fffbbbbf307020e91bc7eabf7c14f04587d49a098cdc56d43f35c89546e14ab. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USTC50818354.
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 0x99c00537515ca1682c451a7f827721623e4698a3d23ecaed7ea6d6340cc1f973. 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/USTC50818374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f58341adbdc0a7402417ddfac85d8ad0ae3abe3b76da950d0c89d97bbc2df8a. 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/USTC50818424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e74c3bc1c26fd86bc0eb85a8a43ec6ca5e340c8bfb31ba6fc9e51701d1776f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USTC50818425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651e921fdb1f631404ea4f8639d5eca86b33b5b9eb447cbe141ba3f3e10ed2e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTC50818426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e1e452b70794dfcb6a991ddfff80a5d4e298948989abd7186033bc88ba2ef4. 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/USTC50818430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10532e62e688b12db753298d6ea9e3d4dbd693a5f5ec8440faff68c7ea730fb5. 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/USTC50818435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4a5e0a19793781d903be1666b301151d6aa92d5069e393c2218b18a0788756. 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/USTC50818436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4162b826a180ae13d6d3cdafd5232cba8797e558f04ea4459d1955a47363db3. 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/USTC50818437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8ab0a75f43168b68b971a5f3930366ae01c66cdeee0a7b9dbf9f1fd14ba5d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USTC50818422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb9b89d31ccfaab2107cb42bce01bd4eb55145d2692937ce03b9d04c264f819. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USTC50818423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b4af0bb4613d71a00d890265c00eae230cd2278b7d3d726fe1441a4c07c194. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USTC50818427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a149cc76c8d8dc28d116124bb0eee3330c3b6c9567c44dfe6fb9e2c188804f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USTC50818429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc298fc3906aa30532e1faa41b33a5eba2479fd328c1dbb2a806407b8a946ef. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USTC50818431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13cde8e0985acac91f81b1f80e2127ade0061b2259c66f38d91cfeedfbc7063. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USTC50818432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124db861f0cadf6aaea0bd576baad9b3f57df1d3be438aae69b8b80f5b50011e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USTC50818433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f22d98e5b99a94662f79721e63717c03a6db2c287cd1178a3bfac9fa5149cf. 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/USTC50818438.