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 0xfc1d74b20af1d9ba101a8545732b9f200972c47b3c22b29bd2efe6a86f34814c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c16ad8ad-f662-4499-ab34-51b1fb34e690.json and https://artists.proofprofile.net/proofs/artist/c16ad8ad-f662-4499-ab34-51b1fb34e690.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 0x43f9c79533ca80e6fc2357bda2ac0bf86ae5d73bca6b37fedc22a6f9ef1d1a3c. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZ8252218493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56039e90411b86c7dd3582d7b156a40979a604353aa5f6b7c7a79e67b44feff3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPLS2215339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c827d69fe73340fe8e63c943700e932b63b26e3fa8c82c253b7e1872f1b07b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA42306293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae2c66eab88c99108b8ddce9870f742b86b3680073ca1a603bec62e88c84892. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:02:52Z), 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/QZK6J2384950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea39767a7ca32b21099e592d02915801369ab05dc4532704373c256cf2528e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPLS2304311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce4967c9e61729d122ed23f67c348a98a996f23e55891a6a242d6f902b6690. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:23:44Z), 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/QZTAU2358160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304551df47de49391bd1043633130ab6029b9f3a5d4e2398f1b8d92510969ff3. 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/QZTB32387964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7683fc2572fec2cd973c0523a1bdb52976473776e59b75472a14a0d531f50a0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFG2388654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3155b38f61cca9401fba9e26ac3c1faca32c1c2f31f48f5d7e1d09d13f1e963. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZFYZ2450633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43ab78d9d03e78e5222c9ca47832b817b65cb7999adb49439696264fac86cb1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES82428229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc3984871bf31ba89331b2da5ae74af8b78d1c2cbf00fc3372306d53b55e326. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNA2409301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2313473e898197466ea63af1e332cb8ddf019128fe4cb34b1c416e56edbd7671. 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/QZTB52428800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d241b2e75ba820728e4dc5788116900a8a45da9b9403ecbab3d91744776f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBE2454609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a48cbce855016fe766ff94e91a282739bd0bb0712e2801076f0312b4e701d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:26Z), 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/QZWFJ2447365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a26e3bc57d99eb70989def2dd93c0a3d5303bc58a62b8a205fc5d79d1335b03. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:28:12Z), 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/QZWFK2440984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3861f17cfaee48274767468bca7230ca600cb3ad0044c840e7a3a66c596d16b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ762463324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9058c4d59b30a45bd158e2db131611b1b2011a99c963ed410e25eb28fdcdfac. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:56Z), 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/QZFZ22528266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900f68418b9eab5645ef830cef0bdcda41abe2c6ac324d03581dacc1c7ac6b70. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ22529493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d05cab0d94b561e483a65edf4e4a85647bb366c69baf194cb35838559d964. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72532936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fc9f7a86fa3c37d247fad6db6bcaf4995d4744d42ed326f7052443169110ed. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:49:25Z), 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/QZES52545379.