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 0xcf46788bf0eab151bb1009fe08650998550d85d2e032f5762b8fee7a14a8523e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af08d831-d2ff-45c7-89bc-8f828f2682cd.json and https://artists.proofprofile.net/proofs/artist/af08d831-d2ff-45c7-89bc-8f828f2682cd.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 0x2df328a52de5e8264e76f82132e4420612752ee80cd64a0f1127c6efd5f58179. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USANG2016431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ecb4a0cc010f718213e6917eb33e9e0c4c6324699f164a71cadfbc9e34baa9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:58:02Z), 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/USANG2016434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41531e5062d5b227b285d8410c99739812be05128a589573e1f4097872e6e5ec. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USANG2016050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98e958f456df95acb2de192c5a195b4567cd063744f115571369bc414d4da2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USANG2016051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb148992ec5f9540074c11176cd830b91d74f7a1596c447e7385e74f2afb9e7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:40:10Z), 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/USANG2016053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd3c75da149a942363b55c36f3d51036fdc4aa3311fcd66580112461849176a. 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/USANG2016054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedb9d07a0735c7b19199ceb70cf09f761beb82b2c534344c859273bed3676d0. 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/USANG2016412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6e81abe5150bcaf181b3b60bd711ebd7e4de9baa10a1cdf041d0c27c7a4e31. 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/USANG2016414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb36564fc50069bd1e53b1ae300c91f0799f15957229434c118b745c2d3300c0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USANG2016038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34272048b92c537946be311dea3998cf26486e2e33416b54ad60d6a2bb2536c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USANG2016043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1f67945ee7d2698c6249ed0b846e13cdc6c3fef1853439890ef077e422fd7b. 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/USANG2016004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33579a9750272e4f748d95fdc3c0230bce63d264305de9a178985578c42e46fa. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USANG2016023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81161fe96422abbec8fae4d9a42481352e70ae17ee63cee13a7f4965fe8910c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USANG2016024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4094a3d413922e4fae20fcaa49911a56a209e05a7a3a4d2a60160239757e4. 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/USANG2016025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a79d06db4fba040fa2804e810b18e47eaade70461ebebc9253a6af0785eaeb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USANG2016031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642442dc9df0a2d28ee5d02a8ad5a42c404e0932faefa96900bd24d90c040d0f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:15Z), 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/USANG2016034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8e1bd197d2041ffa8c671438d8d8aea0ea2d167a5285ba06cb263a896a2ac2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USANG2015981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4fd698ff43a4905a54d0ec7ab60512f3e1a90fc07320571e48247a0210d489. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USANG2015987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1677a3ad04cf41eea14ec4df40436ba678e828c68e262ca7445828653f2a2932. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USANG2015944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964486b5be719ba2de275609265b66816362423b2f85061abb36fa193e6aeda5. 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/USANG2015928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d50c68ccd2a3b8f2e8c8eccb272c6c271ce13989148898eb26637c25dc76eb. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/USANG2015929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac853bfe96926289f4cb93bcb249c74e962c8b1f320e44f66f3f422aa528e1. 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/USANG2015932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204a70258883e68200f9cc0b3a32b89ebc6082a2818e9a5097b439c5145961cb. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USANG2015933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512be91178217873f20d54dfb8f51105360a9f3569cbcdda821cf83fd90e25a1. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USANG2015919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e7e9185f7674510c23a350fd0d886de686bcfe57342f85f949fe139b10c715. 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/USANG2015924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fc10a5b3e341faf305f23757f6e717975ac309b0e46c65578d4f98e8cfdb05. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USANG2409374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb4a5179924fb6ddd8ec224b00f2fce3b68941f7436ef851da3150a3837f0d5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG2409417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815948e19bd47cb8a31e2c1c831460def733b43467218cd25681e43c94be0b3. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USANG2015493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19db1c2522ccffee576e6a22df8f6bbec41c23e18e33c3d79fa3babddf59ca47. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2093375.