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 0xc88d2e16b938e83f1a45577c5b1620708b01397f42bd802c3be50579e778efed. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1a6d341-3620-4b8e-a3ee-6d13ff19a175.json and https://artists.proofprofile.net/proofs/artist/d1a6d341-3620-4b8e-a3ee-6d13ff19a175.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 0xe8d7090483d59dd777a603ccc6af7f30c4ca8b01f6664b1e62d7ffa23a0e029e. 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/JPW562107404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02790aa4d20fb4557e56fa1baeca654e852ffc2d12e5abd4ad89fbd67a612340. 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/JPW562107407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2da0ea8da764dfd67fa45d4f326f2a814968619b04338f91ac4fdbe81b32030. 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/JPW562107409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731dfc5d27c81c67f57b59dc9560a7ebd14cb6b4ac55fcd386ef58fd66f4f06c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/JPW562107405.
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 0x8f6a369948c259db92d6a14cd67e6ccc6ec730456b8e0fd59124bedfcb40bf7e. 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/JPW562107388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0d0f72f9b39cf19a83c1e98356e11f9188682d61b9c954f5b274ad4de3f41a. 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/JPW562107389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca50ecb14f584613be1ec7be8185b124bf34448372c336b6bb0b271ee580874. 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/JPW562107390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a330343638e735456fb38a85fcb5b0a9508b70ea2fa4c8a78adf4254457313. 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/JPW562107392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbfa796a29d80bc81bfa6df95ea1ba474a1ba4aa472a6899a1a6d03ff77dfa0. 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/JPW562107394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dfc399710b2d52fccdf80b4bdabfc01c262ed2a8f2258282a71588eade6621. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPW562107397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d1b5894c0cb2ca122cd57edc5fd830c390b4de4f4a2433bf13f07289caf2f5. 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/JPW562107398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c39c23cb1bb05fa4211fe1e1ce6c9416785b9ca9bfc5112e4e9c50055e7fcfd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:45Z), 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/JPW562107396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bfbf288d30ccd41053a129254a5617e2fc6c7b7d61a71c152e70d5bade0144. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPW562107391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4e9400bd49c6143692f30b8715350785731d44611ac9a17b9bec0408763a2c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW562000486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ca3c83f8128e94aae5d21b310e5dec6dc9f75cf748ec9c45591469190e7b4d. 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/JPW561906214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94299e8402407866c9dd4bd49193961aceebc269a3520fce909cdf0ab4ff8963. 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/JPW561906220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd061b7b4ead63ce9dced9fb76feae6a7bcf3b5dc9fd0cbab4a6835292405d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPW561906212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb6749e7f8759bbf72103b4bc5908133b25308bb434e393daa3b51491be9ff4. 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/JPW561903286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7aabfcf741c049c31e07cc1256fc3737a278b55a033555e21e7ddeb09a3cb0. 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/JPW561903287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f03d72c01af21673677cb356e6b37f5d390ea999ac6ae69d4db17ad8f9944. 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/JPW561903292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf815059838c495b3ac6ce35fbdfb62f1affc83687697bb2e12cf52227c1a117. 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/JPW561903268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4961bfd826f94a529d2242b1f2169740f1de4faa34a0890f8c034b73808f69d4. 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/JPW561903274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee07edfd46d0816053973c69e80f2e1eccd70e13183f2ce83a140d6d58889d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPW561903270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76e5c7bb2022925ec66f88eac240ec03395df1796f630dda2c9ea159af46ff. 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/JPW561903258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd8072ef749131e033743fcde617773cd03660a2f25232113eca9881ccb71e. 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/JPW561903263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d2f294c6bd7442002929c375df3d48fe6788b58aef11bdc95084767917277e. 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/JPW561903244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c85766d57cf92c66b929ac91e6c8d004ca4b147ed95609f4d9f60b37f152d69. 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/JPW561903246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2fc2a0613ee44e014e919b615eb6ef7c129b7ab33e78fc27fc5530cf56580c. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/JPW561903251.