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 0x9b41050afdfc1403718d4dbd59aa74b27546dc7f2037a4968afdb280120a9637. 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/45c90d44-9499-4b64-9b95-4e9e499782dd.json and https://artists.proofprofile.net/proofs/artist/45c90d44-9499-4b64-9b95-4e9e499782dd.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 0xa3c6732dde50164fbc8542925476a9eeb1ba0ce305cb2681f4752ecf36dddf4c. 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/GXD7V2529990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39791beee9fbd91e56be7d6587be65763310584fb00dcfb25e91b8ac8ae3eea2. 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/GXD7V2552412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1395133d2d932e54f447214ce575259e927e2c18bb7f68a691566cebe638a762. 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/GXD7V2541533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c1612eca3f9e68c589150ee35403d9d4df1d722c6411e292daaeb7b664e8ab. 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/GXD7V2529839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb5dbccc05a619a13953f068f7e8d7814d9d427baeeeba3be60ac3e1bf3056. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GXD7V2569495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a9f59757a390e0e8118e3ddf1b8e3fd7d239b5de53c8a48f27dc23dd9abcd. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USDY42562060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1626331182783da14d6dce969890a967a5a5407c7139b6bb2831853aa9a75d3b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:11Z), 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/USDY42562061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b778cfa52e29ae87eac34e85ddeb405a3e3868c239e7d5d4691f028d1f6942f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDY42562062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976d9386636646f8dff902ea842f4a7f6dc95297d7ebb083eeef4cd135f4b8c0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:00:41Z), 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/USDY42562063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a469ef4720afa5be9a6dd7761d3a8f604848e2a3b38b14c7d8cb8551caa7eaa. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USDY42562064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071f15bf39005a4136f309042df46f1df84b0f7e21b8066ab8f779f48f042c46. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:23Z), 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/USDY42562065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d2e3566f85904fadf2230ed9b4e63894382ef082b9eed1fef4ae80d91ae548. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDY42562066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f5ec6d9a18483b20b717ccafe74c3ca8934f73ab032f30b3370c9327137cb0. 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/USDY42562067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f399de4839edd55bf9081fb78e6ff25af9330c6dabbf2d04f1a5858fcc67379. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USDY42562068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85dff0d9a7d1492252917c3c3487d1aa4016758d71480a090a02e1d77ae6432. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:28Z), 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/USDY42562069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c357be370acb6218ffef9a65ec7d584fe08c4e1d193181475ff67dd22997f5. 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/USDY42562071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cbb7e01feeba63c6f5dbf5425e6630ba2d3aad1308e1f554a05a7ae74a783f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USHM22537230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e52f3eed766408f2fdb2f96ec50c43acf8d5fb44413c47a907116221fc9233a. 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/USHM22569077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8942fccb15f1f1d68571f289c9b80239b27bb4dbbb58703159f7c050806408ea. 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/USHM22596763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ff5a3f2470afa4ac449d916f119fdb03a3e9586fe4db482837e69b9948677. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM82533651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53c1f86120b88fcf680c9a5dca9d7cfea95467cfec73c5bd9ef01cc4b9b93c7. 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/USHM82561565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3317e5e312b4d331903203c4b1dd94d804e0752fc4cc9c91334af21ef781dc5d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:53:32Z), 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/USHM82571910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df4088a09c49a100afe85d0d82c31cafa442e3507b2355a6710c5d9bdc7d874. 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/USHM82571911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404194546e1fb9592515819dd0c78d899b833da1fac0d8eb8905e45032401c7. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:24:39Z), 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/USHM82571912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4e3b39b0cda3924a8a4796635d173f1e53f3165e200fbf201d5f0b0fc073d1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:18Z), 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/USHM82571913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2b35b1b2f1d7b32a672ba84bb5207e2ffeabb0d15711c0a722ee81e7fde6bd. 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/USHM82571914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815fae47d5ab75a122a59d6de7254d9744c1de29bdb1213a3660f8a96281e1ef. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:52Z), 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/USHM82571915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837647d91573319136185d9f5cb26fecd02d08ca25f7547e19f38ad2575464f. 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/USHM82571916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7027423f94eb01630745c3cc8c1c0f528f0e71d91ed666a7a8102347dbd48f20. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:10:32Z), 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/USHM82571917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21bc24323dce0215769c4248cbdbe7972fe5a3efa8382b0f05d13bac0b2ef81. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USHM82571918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4ea27dc8faa44f27b1d61d66abcf5c30324e02685ef504b1da2d1b47327485. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM82512430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ff5a3f2470afa4ac449d916f119fdb03a3e9586fe4db482837e69b9948677. 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/USHM82533651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8942fccb15f1f1d68571f289c9b80239b27bb4dbbb58703159f7c050806408ea. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:50:13Z), 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/USHM22596763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61fdf15b16a64c567dbb7fafbef1216e78f0fabab6a2494c2d2c48a5dad30eb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:44:03Z), 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/USHM22583456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2fe19cd0b9f484c04fe810c15d86db26c3a0b70c93e7ec4d7ebd2f64ced8b. 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/USHM22583143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b34f15f76057a5f18448a0223f2b6b8be408e95aff38f4666384530559638. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:41Z), 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/USHM22568191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8159735f3112fc5b130e3d10db362309a0120fd4edc66455756e06bb289c46. 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/USHM92552175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e069c75593d1a4b4a9ade544c46c9dac5b5e34125ddf5f7630e2747144c87a8. 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/USL4Q2583473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f36143088ae2647499729ed5b2c9f35330866edcc2a57a64a973a48537fb98. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USL4R2523422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679d4a31a76757a5c83d221a4a36172896041499589715a320a2b84fc4bab22. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:29Z), 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/QT5M42545738.