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 0x0efca8336a8db02abd9b4a11a134bedb66825fc858ad147f4d622458d0d8f0db. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0358af5e-7715-4bc3-a4d3-6d0add42bd2a.json and https://artists.proofprofile.net/proofs/artist/0358af5e-7715-4bc3-a4d3-6d0add42bd2a.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 0x7252811d58547cf2970ceebefdf7f70208e9a0ac584f471c518040c32ea72c88. 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/GBKPL2004465.
Deviņvīru Spēks (Live at Lielais Dzintars, Liepāja, 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968558d3c334342abe6568f19df8f9822d25dff5b3f9a64972b48c931e925d3e. 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/USDHM2311292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dfd9bf6f13309351b510519bf932983053f85896358221a6477e2ef7ed2350. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USDHM2311296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c632f81ac37bb526a56f9cb541640ddd5d2f129846fd53f182fd139c40bb7c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USDHM2311299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7990a16e51b011515ccb06c5cf27550bd30b0167ac112517fe7d40659d9b1c2b. 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/USDHM2311306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a825c30f94eb227d51c0c65d135d9781cc5841de1725fa19435603f899697. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/LVL152005683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c285b7fe6bab93d6b3dd5cb721738e3e96d4d0771248168eb1d390d62d1a80. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/LVL152005681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca878e7e02cc9280c6113d2d02f80deb81d986ca839432fbb6bd299f90f44d2d. 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/LVL152005675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee93f4d5c7212a7ef401471459f5a2be52132e6ff76292abae449b24ca8eb8a. 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/LVL152005677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc39e51ddbebd9c2a4575f967661706adfd04ce244d92fad10dc338b99ab2ba. 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/LVL152005680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eeed99bf425ab78ee3dc6e627db88b770c1406559361f230680f2bf73c41ac. 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/LVL152005674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f514c32468847a85acc783f7b6841d32660740327d0f32c5404aae9273cf3a. 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/LVL152005679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2270498cb9fade83a484657cf53c8c892624537382dc72c36e1e27809d6f1469. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/LVL152005672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8450eb8839e5702ab7a06c5bc29bff1b03b0227cd011e98d5ba33e8a9bf7f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/LVL151802296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c083b4a10d69ceb924e9716f85e6fe60c127f9e086e50ca7222be9703871ac. 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/LVL151802310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471283fcec2c77970a5333f5282f9c2a3c4c41215cf4f7fb28a77a9b9feaf572. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/LVL151802308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ddab158e0e4194566825135e3d21621be04d60e096b25b2992fa36b4143f28. 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/LVL151802307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b7041dc38bf507075042d8493a7f72ddf5b665f1c303224eb1d1a1bd53a4ab. 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/LVL151802306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c79e66f249029817795f186b7d5bb241025776b8669eb6cb51c01ea444b4560. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/LVL151802302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5743daf8204e0b8ffd2b83969d60c687be56fc60699df6d49dfd5db84a6d62. 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/LVL151802300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3782603413c9f86d7ae04c8a3fe53b1d1c4103a34c15160dcd72a6bd01438a4e. 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/LVL151802297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb400d7a1e6214fb47c2939311c52153c3e76a8f5c2776feacef47132198cc59. 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/USDHM2401391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39353c9c66d21cc6a456ea4ceba41d91ebb79443ceec96f372593648bc1df1c3. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USDHM2401392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e57d7404ffd9eb7f7bef082217ff4099b75c55637cb536bdeeaf46c24983a. 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/USDHM2401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd511db325c5e9440cd6dd76a6983e977cc29a9c4c55f6bf5baa3558b9d4aa69. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDHM2401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb305d347cc0695fdf228055a9beaa7b166612177f9af992cc20be847c5e38. 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/USDHM2401395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7936016d4f0550f4d045091c0fe6ecb3d2dd377c858448857e8ee21aedbcea12. 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/USDHM2401396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d3a7381b2adbd0e924a0b24609b0e0d39e3d3ff9e5f9b513fb2e9c7c8918a8. 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/USDHM2401397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1052d0f3128b2fb25c72c78a3abf3cbaae6c009e818cd83fd50ec6f29cb538. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USDHM2401398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09591bbcf0cce17b673d4077739318cc533b0330dfc73dc829b91d9b28f6cbb8. 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/USDHM2401399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948dccd13e314afe9b9e13bf96e35575e4a642b9a55910a80a7a83654d887cb4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDHM2401400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b7e3f97a861084a58bcbd695b84802ee221fc7d7c7c8c809385ba179eed0c. 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/USDHM2401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0741e14179b270ec8c506b7486a944e57a8e62a8734d09f5656731ea870c7239. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USDHM2401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581301e30cb6a05ec304c8addea6d51a0619646929808298381b5eca2563be86. 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/LVL152402726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d387f96b395d9e7700f4cb24ce22cc08638630da97d171612164bd740d69a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/LVL152402729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5651f4e0e834c09129fb19adcd1ff00b0e7f7dca5190c267d8a79e3d6355cdc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/LVL152402733.