thumb|In the Draper's Shop by Adriaen van Bloemen Draper was originally a term for a retailer or wholesaler of cloth that was mainly for clothing. A draper may additionally operate as a cloth merchant
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 0x1cde4a39f7db2c970c70936a5b8a00eb8d62f0cc77a7cd59eb9e0a4bd585cb83. 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/0d0f4e42-a2a9-491e-a939-1368c20e8350.json and https://artists.proofprofile.net/proofs/artist/0d0f4e42-a2a9-491e-a939-1368c20e8350.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 0xa57533e4ff9b68af98bc9257fa18d432593283de5e8b6e13e849c3e2c69c736f. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USCHR1324946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636667b51cbd3a6af8fd4aa8730fd135f1b94ec9fcd314dfac4344d1fd540eb3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCABS1341063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0d2010091ed003dab315441e283d050164c0caac246b4dc58927a99557d89e. 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/GBHCD2300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb211821a845bf5f5cb905e15367aacaf5fad9802b272d86f5988afa8f8674d9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CA6D21400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d334d4547ad978cae786a94f7f3e2528b09327607460ee2ca095c09b018bcf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA6D21400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44af9511e1f43c2143632c5537cf28fc807ade57d64b81d708a5a63a4db35a4. 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/CA6D21400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4dd4d6d2fb77603d0af6e03266eb66aa8266d044356b082d75698b903bc467. 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/CA6D21500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025209c1bf4647788683ef16b0ba9e3825ab4bc6ad6fca1708691ff2c143e85c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CA6D21500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd406774c0118d6d439ecaa15d40b729551aa9d51f2eefc1761b27556d6c4b5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:59Z), 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/GBUM91600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5228308e556f265df2112afc35c6c63cc88e20051113d269fa3051c4b82047aa. 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/UK79E1500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e373b6c169c756df17356f4c7d0de0aee1075d23046828fb85a360353366c36. 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/CA6D21600187.
They Know (feat. Matty Rico) [CHIMES Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dccf41db5110d119717b20e9bb904f3960816cdd7f44d4db5aaa88ee55969e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:28:26Z), 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/CAN111800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c03d728df9c88d64467d11af927d43cc9e73a209771f8d066fa75e4d86f966. 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/QM6MZ1487549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2235bd1e623dacfa144d359547e69e5965821127164f4ed32f06182e6ad2248d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QM24S1843934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3644e6791f957ccf1489264272acd779b4909cf744ce84aa0451ffd3cad4f8e7. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QM24S2011685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b683c9c740cc581ef7e441b9d56e37a8bba3331d79c44c0b5e1ee76a7235ee. 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/GBHCD2300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf88bcfa53e7961b994ee6226bdf8fb1e4ef414401deb3c6d24d42fcf76f877b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABL1374331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb62b4a855d50daf513fb56a73d15d6ce01e6e1c2008908a4a0bd73c155add. 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/CA6D21400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1cb3bd14290155dc9637ba5fa97eab0f70681206eb4106b0bd78ed3dd772c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR1818344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943bfe74bb744b5fe945d42a969fa940b9999d1e1148c87763609411be994458. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUBM01100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf88bcfa53e7961b994ee6226bdf8fb1e4ef414401deb3c6d24d42fcf76f877b. 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/TCABL1374331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb62b4a855d50daf513fb56a73d15d6ce01e6e1c2008908a4a0bd73c155add. 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/CA6D21400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf88bcfa53e7961b994ee6226bdf8fb1e4ef414401deb3c6d24d42fcf76f877b. 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/TCABL1374331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb62b4a855d50daf513fb56a73d15d6ce01e6e1c2008908a4a0bd73c155add. 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/CA6D21400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4dd4d6d2fb77603d0af6e03266eb66aa8266d044356b082d75698b903bc467. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/CA6D21500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754db83fa297717731a356b00e1756f47c06646500a10000664a9e3b8c9acac8. 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/GBARL1501408.