thumb|A toy motor scooter from 1955 A toy or plaything is an object that is used primarily to provide entertainment. Simple examples include toy blocks, board games, and dolls. Toys are often designed
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 0x75f53f6036ae24277c0035c9f9ed5699c908cd421555043dc6a19b7d986a21eb. 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/4bccb388-67d6-4775-895f-530cb0243700.json and https://artists.proofprofile.net/proofs/artist/4bccb388-67d6-4775-895f-530cb0243700.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 0x23ce96dbb1e216498f9fff0426bc0be5f366974cf26a36a946a8bee7fbcf6ff5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6F2091366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690ce29034a57ef74d662b0ba8e86674aea52d544eb9f4a8813ba4b6f6319c2. 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/QZK6F2091367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec32a3ec459ebf4ba5d83027b92d22e875d2dfea386533d417b7fc094f59364. 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/QZK6F2091370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5151fa51c4d0df83b9c074250cb3f150c5280681c6410837dbdbf455c389b9b. 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/QZK6F2091371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255b2571b2b534297df17795bf5a8840313688bfb2be39e2a18832d177e8c348. 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/QZK6F2091372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b390dc73f60b3350b23923dfc78e16f72fb3065a3ed9f85c9b9e198d3b56dad. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZK6F2091373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ae712c07ba45883ff342ca7414e6d7f22d5ac118cf6d5b2e253c2590fd6c9. 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/QZK6F2091376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58ad4fb0e10f6057b77aca3eb8833f3b0f1443aea3230a008d100d775da6f4f. 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/QZDA62382163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c03a84a59cfbbc2498b52e1a2227d968c28783d27e81faf757d8953550209a. 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/QZDA62382168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbd983eee9c6ced0b248df87eceb669c5067c0c4733d169e3a2b4bbbf8cfb97. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA62382170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb56fb44ae4509d7c57de7d8f8fa7c9f8694e8a04a3178dffa486166c94c163. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZDA62382172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5e76ada22d6a888f0c28d933be4243857352dd1533888db09bf74b326c332. 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/QZDA62382174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975925adc826eab0e29e710c40e50ed60c1d2fffffd016fd45179ff04f8b70a7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA62382175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47dcf6cbaa168108115821af496615964389cd8cc73275e6a77aa1219cea5e1. 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/QZNWS2575486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afde822f8f48c8260e385140e2116eb6fb6dd890371277363095939755f315c. 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/QZRP42551861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45a70d8636689abce5ca2b22e9f59366a4b3986efc1f4d88aa2f72b1d15afad. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZRP42551862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b00b073b4db41266913facd493b3963fbbba19b0e81cbebebab491c1299988f. 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/QZRP42551868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daf1af1dd1fdfce1f91afd8ac9d742371058cd7e11502204ba81fbad97c33cd. 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/QZRP42551869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb446f1163a20d801f3ad56d44e98a6d9b9e0f7cec6b294e3850335b64c556b83. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42551870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1d95c180287fb8bc0cae09486225e10dd4ee734fb72f71f61a5f3ba50aa9e0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZRP42551871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724ff1e76df622ab27b8e88e2fff23651f94eecdc66b784b432cadf4de763d80. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42551874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545b3d640488df933b11f8c5710edc50b7351614984867c4d77526208abdd690. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZRP42551875.