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 0x7cd673b456b6ccd01082b9a2beeda9e5debca6c30306678f9b0d31874a312fec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e99d2fc-ada2-4b0b-93e3-d0f4a2cb335b.json and https://artists.proofprofile.net/proofs/artist/1e99d2fc-ada2-4b0b-93e3-d0f4a2cb335b.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 0xf31d14f383288e0ca4e2e97683201187a227672ce02f9c26f1e92be8a564f534. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91921130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3f1ec2a216e59c999c4889035deaa698ec1ce145307d67cdbac59bdfcaaf0e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGJ2016045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20605360e0da2b9dee53c75b9daf4a0639ba373beb7b9eb9e61c6f0c94d2ff7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH2090482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297c1d8b078b014e242dd149399137e7620d3f2231a2b964d49bc0bc53b86ac. 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/USCGJ2016047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f65b5beaa40721ae74b7ed6d5c742eca98035c129a3eaec622f721914ebafa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGJ2016048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a32aa357777e3732d9b714fe92f4434a8451581b2f0e761e7c11a47a69b0a09. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2016050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cc5ccbb72b31468f94d21e956e8697403c174fcf274571036b4fd84a1bc52e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBF2488796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d1cee6badda8335b080d875a9382f9b732222b824737d172aaa07eb46559e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2418130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e79009fa8341de6709dc3aca1d5809a4b6fe7cb38f1e8e66d195e5a193b7fa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWR2422345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f4e58fca9ec19e8fc0ba4089cb6cdfde12d3e82b9786d2ce370d0156e0a14e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6J2466054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb614d15fb0dcc203c49f4afc828c31f3aa6a7aae27ec48ae822950279d02fdaa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:38:52Z), 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/USL4Q2386946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96a66dbd3b0c01fff7aa1a86b31b3c5ea68f170c21b714078fab0227d3463e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2352429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8edb8c43c7c98dcd501b43269a9ac67b6d03399384eb46d991c73289ba97551. 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/USHM82239499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c23f6dcf4879d538f71dae7ed224ae0702ab666dc4edb9841abee183b8e43. 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/USHM82240161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8edb8c43c7c98dcd501b43269a9ac67b6d03399384eb46d991c73289ba97551. 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/USHM82239499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0c3e63d108348b0c3ee2fbbc73b2b8a047de10f9cc4f28a6d78ba65a548681. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ2125348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f44b2b8938c1086702e779c621c997ad33572a13ddb8e616191123b55c6ffc. 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/QZMEQ2078076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20605360e0da2b9dee53c75b9daf4a0639ba373beb7b9eb9e61c6f0c94d2ff7. 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/USCGH2090482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31d14f383288e0ca4e2e97683201187a227672ce02f9c26f1e92be8a564f534. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM91921130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeabba54c69f45bfcf2b6962ee23054388645065caa397083ff0540066c3914. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ1963529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a367bcf72cfbaad97d2237cc4e6fc8b539bd214c74d8ad23527c3e659167ff7. 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/USCGJ1963530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43db313a2e75e07ddbae95a446df24359f9ae31826a9d99b50fc84344fec1b. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:25:13Z), 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/USHM91817830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b875dbc69da1854d8d2c266e92524137e538967d697c29721117aa9bfa0b11. 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/QZES92136009.