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 0x9630468a635eb0df68b41d8f2df0f1175edb2b2009fb9d7c118c551e2dff3793. 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/ca7e5605-6ef5-4b39-a4e4-bde17216e8b3.json and https://artists.proofprofile.net/proofs/artist/ca7e5605-6ef5-4b39-a4e4-bde17216e8b3.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 0xda51760f322dfe994b473f264b80e8be45f2bc93f5a469787ce2beefc385dc04. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB62292549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238bd5a391d5566ba3dd3200d50d42ecb0287ab1fcfa040749d067a6db6eb9ec. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:13Z), 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/QZTB62292550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1805f08175609ea00e7300f88ef3a48358bbc8b5b11607b89d96eb386d3031. 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/QZTB62292551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d70e3f3920b6830a321798a6e4d33e0b0eb9b1b88e8b4c2cf6ccabaae6983c. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZTB62279551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75e3117ae6f7ae3aac95271aba2bd5d1a54597c2edeb64b51883366a312df88. 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/QZTB62279552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b721ce16b0d036e805d6bef0c25690f3fd946663cdab474e831a079f6f6b6d. 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/QZTB62279553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd708f30497e64a9bcfdae85d043ee37b217fe7761064db822a53ac0086741408. 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/QZTB62279555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e90ef549cace2ff544feeae3ae522e6afbf808a4bb24be86eea098998ccb82. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:36Z), 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/QZTB62279556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36f52e4ada840bab08004fc903e3b219c0128f3b85891aef7b4b8926617a839. 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/QZTB62279558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6acf736297281a2face73c797befe9965dc36a9c23c847620f668b03d54a6a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTB62279561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda51760f322dfe994b473f264b80e8be45f2bc93f5a469787ce2beefc385dc04. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTB62292549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238bd5a391d5566ba3dd3200d50d42ecb0287ab1fcfa040749d067a6db6eb9ec. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTB62292550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1805f08175609ea00e7300f88ef3a48358bbc8b5b11607b89d96eb386d3031. 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/QZTB62292551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba37625fd51b380d6a4da9f90604d97318e1be29889b0ea62926b61df41916. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB72239127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde7ad3c7d757b3a57c256ae76273365ef31f7653037f91f9323a3e2e1252330. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB72239125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe382e9dbd491c5aca60f80555ae49268465053becf036addccdc0358f896df6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTB72239126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba37625fd51b380d6a4da9f90604d97318e1be29889b0ea62926b61df41916. 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/QZTB72239127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89763daa48cff1a4cce633285a42256903abafb8c638ac2922c519c1d537322. 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/QZTB72239128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe776fce0b611ab2556f7dc534ed5255bddb222f4dcf0b632badee19f2fe6af90. 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/QZTB72239131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7771524a57d0baf2b0b5c294231437a4d3746b55fe39e8e469f80ca1ebec508. 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/QZK6L2234800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed9950becdd54e9301eca75a51a79426dbc95ebebf20c0dd8a5e542abb6381. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:06Z), 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/QZK6L2234803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8941c024b21bcd8b60a8b988a7d63e1fa639891e2db8108c9d114e255c3a3967. 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/QZK6L2234811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3b585a4f7809ace56bcaf8319deb7881288c25d7efca95120cbd6a44fa4acd. 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/TCAJV2585490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2824447e6658b056162d742170f2d1bf8950060286ceb251a6d82968adbb0. 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/TCAJU2585507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd6494c185d354000219930a08d275ad7cd7bc0abe4b9b1da5077249404c734. 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/TCAJU2585516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e99282dcceedd29e060a23c7752f29c81fb0b7933f64ea002fa21c1f8c287. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJU2585522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc722324daefc8040b4fe9811d3f845b4ae65e4da9e0bb7cbbb2f74ef1a69847. 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/TCAJU2585526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762c3cc5b146209c885d59a43f09202eece631bac5df871523478f7b80e05ff. 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/QZTB72328127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c01b6b2d0eb32992c35bff01a4028a2bf58d51da6827c8b527197d0fb02735b. 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/QZTB72328129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa438812083bde78c5f4b97b663308b673ec4d7dbea4e67b3762b936658beb579. 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/QZTB72328131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97221f9e38fe2c0bf89a4e0e58f382c12cf1b6282f5c1bd585cdd18faa3ebaee. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTB72328132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ccdcb026820dfbbe9628a656ab60d452e8bea4b56555115497733ee1239a2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:44:43Z), 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/QZTB72328134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c4b9edbbdbaab32113563dfb92995086a023eff2cca82699e6e276566c5c3. 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/QZTB72328136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9357fb1f515baf0ada29059dc0818aea1828530caee70c8c13cb274b71a705b1. 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/QZTB72328137.