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 0x3c7b43399bd2e1a716540bf2aca9ff3c5aab06ae44483c139f5e7336becefa17. 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/e0441bed-688e-455e-92a6-090c6cfb13b2.json and https://artists.proofprofile.net/proofs/artist/e0441bed-688e-455e-92a6-090c6cfb13b2.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 0xf07b96fe856ec506cda676aa888c0e9df3c678af38f7dbb4f7354ee93c79adca. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:29Z), 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/QZNJV2188865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70857ce3e6adcba54358e9ddda14dd55d7aa9a44ebb78ff1b3118a2a0bbb1d5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJW2142606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253183e9843aed43a4abb4997ceb70d13cbf4359b0724227563a542ea41bf01e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTVM2119578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7383a014c3ee5baae2da7e9870f96a6710425e302f8b0d551aaeeacd79823db2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:49:12Z), 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/US7VG2294069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e12090666f650c80386f6364fc8da0ed066a6de8ca817ab54662a261ee80e. 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/QZHZ32270317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ba833048c99aa06ce462def6f35fc7bd3b88f432384d7c3e37c207c3a79e78. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHZ52278158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e1d0274d671bd00e1447d0eb9b7966d402b0df13082fce46d5ec7942ae6620. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BKWER2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810668d4e95b7924be8829169625489cf6f20c80676bda8d9c8ba4d972268d54. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:54:41Z), 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/BKWER2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce476369ef1287b6a136ddd928b8f7a21aec7b4cea8b6f121767a8d43d20472. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:07Z), 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/QZGLM2342043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be04b8a1ebf7f1e9d9e6d433213c68a33717df392af065b88512a7e739e001e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ5AB2328355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7691681aeb50476312543bb0f754c1301a470059a2ae5c015ec5490351da158c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZ5AB2440358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b5dbc831bea6cee0f6ee252ff645fbb18230c31a40ef3dd7452e04b403960. 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/QZGLS2403186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a9718550058a4c094aa759cef963f00117d18da3acfe9943c8fb7e50305e4b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNJZ2461238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbb89c66f8ca0952eb304ab84c13a5a1a0492af63f6fb14a5fad89d9c9c64b3. 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/BKWER2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326e81d551643b9c1812937820b5ba3625915d977f4fd46f33e49a157ff6ca09. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BKWER2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef68a5c4760e8ae14842f5b0ba24d3e04eeb8caeb15fecaf8ebc53d80d0136d. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/BKWER2500013.