Labor Day is a federal holiday in the United States celebrated on the first Monday of September to honor and recognize the American labor movement and the works and contributions of laborers to the de
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 0x1139a8a5f3f66737bc8d11c696a798ac330e6b03e55a109629f34d7cdacc02bc. 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/0e928d8e-99d1-4499-aea3-2a77ae531e7c.json and https://artists.proofprofile.net/proofs/artist/0e928d8e-99d1-4499-aea3-2a77ae531e7c.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 0x53df3eaf61dc7609a8cd201a4ee4b67fa438650ff876797b7676a48b74608819. 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/JPB600951501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cd5c1eac559b4bc58dd0ebe8eb7f6bfbb32b373b2dcc8ee7564a6039e976f5. 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/JPB600967901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8b10d22d56d79c1127b6a235130c7b3ce312a80453abe831a9274f5a20338. 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/JPB600957301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128dfcf066da8ad76b927c39783edc6d456e4307ee2b538d7195a92700630f97. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/JPB600957303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6873f787f04e426750bdc0b542a41227c84974819f2c03584c8244bc83d0fd70. 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/JPB600967902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49752e1845176e349149e0e387ab2716002c2ed0d47a1e08027a9a319f42c337. 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/JPB600968201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f3b9812646bd736fc4f5efd41c8749328ef9f6fb156bc36cc0f8245a325de. 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/JPB600967903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f558698b1627f209fd25bd95769b57758afb3f375437125c0825482ef17b61. 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/JPB600968301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3f7815f7b37a27dc1209ca81a61f4878db8f7a91a8d504a5efbdf56afecf5d. 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/JPB600968302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3d609797ca32673ea7280885a0c77374e1aafd913921d2b52476a17982fbf. 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/JPB600968401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a36e7bfd2839dbd7ad6d0526e90e02c7fd06efc44f87fd417feb0e381cc6ab. 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/JPB601017001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26076d76e8f67eda0f870a3c70c03dd522afedf02e45d25d815cb0b0127b1182. 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/JPB601007601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052df6215d1bbb962f10b0666a168eb575c368c41c79abb7da9b8dfa7c014a55. 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/JPB601022401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1404507c219fc6cba232ea84aee277bc1302b07a3d6637f15b66227d1063a5f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPB601007605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ce1fd127203f077c8cbe4776cae58b27ec407845f9109bd2321c18bb6eef2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPB600967908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a633be90e0737dc1e037b7216b7d545519e81f122c395a9fa64d7d4ed5d47. 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/JPB601042901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee36a88046c27f7c6e9c6e36a4cb46b2d118f8b64a032264bbe53e39d54fa4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPB601049201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c616a85222beca406c5a01db1ed7a53698c8daf837eb0910c0f2c79da2d87a4. 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/JPB601049202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2334615d52de54ba228259774e6a5c1fb24adb60cb424904665f65f03f91a8e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPB600967911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d510d73bd72aa00a550be85b22ae79993bd790bc1a0edf8e0d91809be39119. 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/JPB600951503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a23a9fd4f38a27daee2a43bfb431ec25a95e7db70fd06de828f3839ad4bda8. 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/JPB600967914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8b10d22d56d79c1127b6a235130c7b3ce312a80453abe831a9274f5a20338. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPB600957301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128dfcf066da8ad76b927c39783edc6d456e4307ee2b538d7195a92700630f97. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPB600957303.