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 0xbac1deecf8fbabe4a857d440078eb47a290b469358ee41755b3eebab18767cfa. 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/f6fb65f6-bf64-4fef-869d-3400f49cd561.json and https://artists.proofprofile.net/proofs/artist/f6fb65f6-bf64-4fef-869d-3400f49cd561.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 0x3963eda88941c5e64b7299d57bb324b7947c64588b207c41f6cf49f1f415dde0. 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/ITM461700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25298ed4751107b963225b0cb000b463b8cb6dc4ad0456af27c2fca165be8f. 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/ITM461700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047fb23e1c61de37d8c0eb89a7e80f023a659e6d37d41faebc1ad0d26ecced0e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ITM461700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a460870bb08f7a28164d26e5daa4c1ab2c0e81ad3f5b333c3044dd5cd8a1c02. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITM461700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab7bee968394642e19910061cc2e2d1d7e38cb4da10d4542b730629c4d4117. 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/ITM461700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b80642852f9ffe80d97a066b460fc76e4f181ebc583601a36b2c458554f334. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITM461700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c589204998203fd80b326baa5b2bafe7fb21c9ce8a9a92122a18ab8298254d8. 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/ITM461700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ec5cf5528058d406bf213b3c68f4090c9774c7bb8b09d36613ad6f0ae22f78. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITM461700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4cfd825cd30ee1a69eeefd240654eb6ea8fc5c511f09ab3a69e9b28bf43a08. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USY251528336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd286fcdf9dcaa3a10f53500cd8e27df19873db1d617ce52da6844fc390fd93ab. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USY251528337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda60164ab087c4f6eecd7d09485d2e43328c45bf8a48616ddfa5d71b787e2d3a. 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/USY251528338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea6c2dd0aa900c1da8da0a11c8bf1e9fa823b37ce9fb57cade8eb2e15cdbf16. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USY251528339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6376f5ee5379607e0fd9d4a290638f2dcb660563cdd3bf1a94d3cef171234. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USY251528340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5ab1429bc3dc3e4e700223e3e48196546f5ff0ac437eee852836fe11f39e0a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USY251528341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2440c69ed1c28486f6632a17c18d5a09a988bce3ecf5f1578791726aab637. 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/USY251528342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a4812feda45fc1f73186865dcd1cb29090cdea0bdde5226b6ca1117c2a80c. 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/USY251526822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d91c833d500a88d21089e4e4b437b04faf5a4c5cd5820a657812c12a122480. 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/USY251526823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d5591d226e1ff8a3a328891043dc24b47625207ebfa8ed84e12432821b6f8. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USY251526824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528df8bb8b9aad9dc6e700a20a6c37e63a34687f81d6dbd3de1ca3eb8e805464. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USY251526825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb021591817d032023cd291c4ca52a76287480c715a1b8944bf1d8010c783ef66. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USY251526826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc042862a8aeff1b90d99ce817102404a2e4ccfb1709036ac65ceaed934280914. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USY251526827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabf309bb0b0c10a8b46c3e8583dcb401080d5a2cffe444c3b3bd3daae2e4f10. 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/USY251526828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec916ad9dfe85f50f8738140277a10a1dfb6164d48dc063a692fecfc7481323. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USY251526829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b215b06d9e817692fc6cfab7106d9bc332fc8932cdee2420213add91fb90d22. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USY251526830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b23e7f2a9ad28c4e6c8092fa7cb50a370619cd000317a91ad18f3cf8a8f9c57. 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/USY251526831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1258e5e8c695989b31ab0631f183483abb39aa45ffaa90bffc36d5aaca40e99. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USY251526832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe64c922cc17fa2323de3be57f5f28248e93003bfba03803fcf6e26e262633e. 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/USY251526762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a227d79c1817c1ff2386932ab0fd06061ece55fbe9cd41aa554427d9b2f5d3b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USY251526763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649604db3ac27d3c858e42a833a7be05962ed5d4dcb381250bc0ce70f99526eb. 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/USY251526764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31c3ef1655a47c14529ff7e8068951fbfd2fc179e5a65ab2ba22ee9b45ba511. 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/USY251526765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394d6ee7dc7f988462da4ca6134defdc728d28e9ad403cead43c4c79f554262a. 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/USY251526766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520bec1a0927f5df935217b186bf69ea54481693027436b5aaac2f88e748b78. 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/USY251526767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebda91ab96900d266566de67d92f7b3079e3d7b719d5ac616a83b5d492e81c96. 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/USY251526768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e10e073fbab62eae0217c8e3bb5529855c90f35e449f3166b87266c83129e. 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/USY251526769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c774b0939dc7a24b464c117d275f928a51f95af33dc9f467737b2eb0311e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USY251674076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0b95b479d6870df961f50392c4f226f6a11ffa7bbd326d39782725dc00ace0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USY251674077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9892f5dd6a4d04dd7b02d96594c30cfb3ba15f194e202f4c3b348799572c0ff. 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/USY251674078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ac95aa5241bb71ba6117470047827f4465fa63a4681c49f83307d9100c5a2. 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/USY251674079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5192727b3532073ffb097d83842682095234b15448aca265fc8bdd6767e51b10. 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/USY251674080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe157931ece4e375b39d756497485c62cef40271ff915a6543e72134052441c65. 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/USY251674081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec5b6dcc4f6079543701b018d24dbd9a7f10ffcbfa63125a352fa2737d9bb64. 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/USY251674082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9ae015c495db2058bb2c83923013645a1bbfd1297b81c18e064a1555d232d8. 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/USASN2210077.