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 0x1ef79b869356d739ad1bc0d6f4207c786f6cae533f776843bd49b160642a7c40. 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/29b6c6c9-d5ee-4d1d-b168-33286de39bbf.json and https://artists.proofprofile.net/proofs/artist/29b6c6c9-d5ee-4d1d-b168-33286de39bbf.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 0x19f64bfe428590e6b59ff4b99df85f431a9ff019670dc32a223863f3fcd26154. 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/QZTB32439030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d87e5cf9fff9b754b78b1dd089b373d6ff6772bbdfbfcd7716615d444ea78c. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTB62491955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d490c7907cf664206f5698dc5dd5e651cac0e34b9d989a1e246a6b311c732. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTB62491956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0704a28cac7796e027b4d7110d298a745572795862edd089f77986fcddbf0fc1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB62491957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b1d7f872f85f2aa000cc26695b23c1a687a275b5241c230e106a4828278361. 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/QZTB62491958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d02fb443231f861e37efbdd609704d005bf8c4d8c0972bd218f09656f33059. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB62491959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c7a8e942b05006211ebf3d18f5fbb3bc274d4e1ab6ffd7b8b7ab9719164c43. 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/QZTB62491960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78064109bc2800886c8dd222a97f8dcce8c1ce2a1922fa902d7f75ac5c80531. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:29Z), 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/QZTB62491961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9fe973c7ec8eb3f658d62a21d60d0a027385911686a59093fda23be5aacf95. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:43Z), 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/QZTB62491964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ee103427de0c6cdc5054febd43b667f913b790bec8a766ea6f3bb6e3d76478. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB62491967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf351b2ad95ef570464475c6aa92ed3e66edb67d66a3567fc232a121a1eb22d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB62491969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1287501186b0d1b44ced9c422b59be1749b6341f8e6961ec67cddf08b437c3f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZHNC2522623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b70c36db594e4c0e264d11d63d659b8fc3ea41f122d81af72badcbb34e005e7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:06Z), 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/QZTB32439017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d754aa326392fa64141c3c9365d0138670fe01f8cf1b0a7c4cf09546c60a11c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:19Z), 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/QZTB32439018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb50ec18be8d2fea5ddc29b61b87f291cfa749536bd0b4a8c595dd9b48e36b4e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:58:56Z), 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/QZTB32439019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b41bbae204a865c1e18b4192c4740d10d8e6f1d91cf12f2ba894debb2333239. 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/QZTB32439020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7489a492aa2544c6ba223187110cf7f967854f3bb02b5602c4ceb05d2b5d3422. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:21:55Z), 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/QZTB32439021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3d46e25c57ff0c879db65c22b429d990907df2c6a72679d929cf4042370cf9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB32439023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55aeded10af25afc62c484fee2311239d8d66d2d5dcfd8f39c15acf58c2a6cce. 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/QZTB32439024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576e5154310fcc5bc0d16a332185a5a414b5a3c7920fe31aa8d9f3c01c2a4f10. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMEQ2501765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf560e08b08a9fba1db354183ebbd7a5b0af1586d009c42c5a3a4a8683112cf6e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEQ2501766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5438326e2f34ea7e9c831fa81de29904113beccc4a121f14af8f2f1830409caa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:00Z), 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/QZMEQ2501767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fd8c4fc69653355405c308150435698e7d3783744e4099f55e9a051298a81. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEQ2501770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aa355b5cc0944a62ef5c58580a1b1f25267a3656130126a7debaacbab315e9. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZMEQ2501771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472ee3d83dbc9c897063fd9843d73d1c5e8130d9e117689ec3d80648a2ccbf49. 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/QZMEQ2501772.