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 0xf4f6e1677114baf455783f3ee2b09c3c31aa589379f1bb67454ad91837e481e3. 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/93f48ecb-fd1a-4563-a894-8241167d8900.json and https://artists.proofprofile.net/proofs/artist/93f48ecb-fd1a-4563-a894-8241167d8900.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 0x81cb48fdf8d86ae06f8d8bb59b6a1288d4b6b23409bf26acd9d50ceb5e871cf6. 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/GRFM19500686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc78ce30094d9340b400e13e34de641c94b8e0729f6773101be1cc29ef0d9b3. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GRFM19700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa87481381ca14c2e23674ad1fd2eaadf833da03b8b23fc9a8e646a1042dfcba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GRUN10100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c23d8a86227494744d27274d0d170ab84fecbc1d114e625924f5f7a21d76ac6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GRUN10100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fed8cfa28b3a13275b13b20537b08fb75d375daa478e6408c2e994fda49d9c. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GRUN10400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0014878f94ca3f8eee183262d11042eebe721607cf960680b84a6b15973b2fc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:28:07Z), 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/GRUN10400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9328b5f36dc6b85c42e95bebffb62101fc646de5c900a7b4bbadcf7e8da0e4eb. 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/GRUN10400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca6d49d99c7265f991e47be64b23b6170fcaaaa698915fde0bea8a35255a95. 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/GRUN10400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1a11018e1be8511bca30e1b0e705865bcdbe313e6251caae56ef889e2c579c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:18Z), 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/GRUN10400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324cd86421b3aec8bbae56ec8d3df89a1a99f7231a7560a16b6890a5d62cac5f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:05:00Z), 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/GRUN10400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1380879eca9c43a923a7968eac825ee608045c3b1d84f60dcdd0225d97b05fa2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GRUM70500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d45b5e0d870665e85cf0f1682ee020879bb2d223129a8a2168e98caaafdcb6a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GRUM70600716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd419fb08686649ce485bad026d2a554d8c1b61b3eb81460b79df4c9829c7d223. 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/GRUM70600717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447b2a1628532c254f5448a30f8c17bf6a9558be3aa917e935180f1b8cd51b07. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:21Z), 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/GRUM70600718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b1c604e33c71522f5ceaab343896e413fe259c4998c9141d561e241a8dc7f1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GRUM70600720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9604238cd028e17b90b8da75023413559d4d2309fc0142624f74f4086957e1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GRUM70600721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03920ceef298dc4ab9faeafbdde6977057182ad431d2aebf07539a4fb6e26fe9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:35:50Z), 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/GRUM70600722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70b5913d5167856d9a8bdfceff687ab9259dfaa0a439160ecfb65420d0bf61f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GRUM70600723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a79bc87d324f191c1643e837cc20888468de25f26c1ac51b8c1a8fe9f794aac. 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/GRUM70600724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ddaac4a7c8726e95bb9c8b10be38e273a54ab7679c96882e0fab67b05d1b70. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GRUM70600728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993ea5fce277c5142b151ae7ca7913ad0d096fd88f90890b8c7ef429cac65b67. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GRUM70600729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bdc5a87bc66c7e754e8a7f85b3e7a6ac6bdf121a0555ddf874dc5a622cb5d3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GRUM70701815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3be136d5c83fa40359a87c0720c51c2b4a6f34d3438ccee0b2aa280c6ecac7a. 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/GRUM70800817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e06d5621c7bc282ee0b6566115a7779a1a69a7c940dfd86baa04d8cb99e747. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GRUM70800819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded4a69ab266e31a571cd4149a45fb758f4ec345ff35ebd9bd60644875b7a3d9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GRUM71000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8552e17026ef1ee6906d6caff94cb01e1e2da05c578308798dbdf04145d76dd. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GRUM70802241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45068b6a0e574b2752ee36d0b04fb9b95c9d1cb4335b97cc1f1407bda2e0aabf. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/GRCB11400978.
Kalinychta Ellada (Virgin White Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf528d3ae945763fb06f8d998718b9cb94bef17221cbffd1540df231e96cb720b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GRCB11403117.
Kalinychta Ellada - Virgin White Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0685093f5f198c96d340a8f89aca00f777123369cca51292ef27323bdb6c684. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GRCB11402820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cd4e6fff805179cd65be5a1a530491946184708190fb7411c98dc855fb6fc6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GRCB11403024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee38943efd233473f8d45187078eabb96f78685fbe61a9da784f587043f053c. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GRCB11402821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985961753aff43f30150995f15b9730c1192ffc7edb965a318e55999b9e795a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GRCB12300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e761ed997fe2af57321d1117e12fab5e743cda6b8abf97de0172b09fcfdb7c3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHO2326195.