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 0xa9075158720e88555cc3a676b86c1d32f66be1c37363f71b051177df0900510c. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3408ac66-19e2-4beb-b522-081ad945cf9a.json and https://artists.proofprofile.net/proofs/artist/3408ac66-19e2-4beb-b522-081ad945cf9a.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 0xbf57c7996aeaaf362f47c0adc4dcb5e1d7da9218cfd42d36f477e6bc709d0d90. 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/DEQ121639965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe41e69174f74779a7901ad91857bf0d2fac0198199046687efd4a2a62a490. 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/DEQ121639966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc57067d212d5e9acb735238d4cabfb1c864727c792040c0ae402f2fe97c165. 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/DEQ121639968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4990138e71b9482828e63b35b143bfb3a25d8c810a2f9330ef9e676d0325e0. 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/DEQ121639970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1017683e712c3fbb9c7c1b48d5fa483649ab6f84f26a5b13143dfa680652c91. 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/DEQ121639972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116bde94a67c2d97958b0b8c6864e0f6b2eb40748a2a8336eab357c9e5ab0451. 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/DEQ121639974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a9fcbb631bf6e3380336f6efd17095e5720c614b28010b0c0b39ee804752e. 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/DEQ121639975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f2e2ce57ee77a05dc3cae5720c36509977a9ffe1c9385cb61bb57fbb1e60f. 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/DEQ121639978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aabb75c367281e94215be08a85b2513ed00f49e4b8060e1beb25a79adb86fa1. 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/DEQ121639979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b1d7bd51d216acbf85732325002269ada88286a71eb39c558208b06215818. 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/DEQ121430875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fddd55605b2699249abc5a39047d1fed7ecfdc4d69b62a212158a1573904f8c. 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/DEQ121430876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf565e458d8bcf0987f6606e55c923ef929573913dbff01ca6800ee9c130b1e1. 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/DEQ121430883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aebbe22699d4877bf8b9e5ff93572054cc985d89480cd685c97c4bb77f2707. 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/DEQ121430878.
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 0x8f1b457a5391e58611568103c12aaff1c42283dd5960034ee8be59bd26ace208. 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/CH7811928302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c7ca7f6793305bd787f07856ac2e0c1f893cf664124705f314fa6b3ee364c. 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/CH7811928309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df04f90a8c9efe3cb8e44e3d4f1751f6a591d9bf8a1149d55ebab6343bd6f8a. 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/CH7811928310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca8f4676f7485c20e9fdcfde1479eb31b28df582b68f36f2ff1b597d6e56776. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH7811928305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7236851944de2e9c29319b6bbdf3b9e8bcdd7b2228bc9a4fc23bbf2bda7417bb. 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/DEQ121536619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabd124fe6c052bf6c5a642972182acaaf1e01d91498708ea52ca45d83de0514. 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/DEQ121536621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ec750b724bffda23b63bd4a1393f0e66f63cd412a020ad2ffafcb8188abc88. 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/DEQ121536631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeaf78646fab38a088151d922bee75ccaa36f9a4c73afd4f6164d1bb29de989. 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/DEQ121536625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa3794728f980661207c16760588f2987d94ff5e9015bfbdef78cee777a4091. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEQ121536626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8b5809bfcd626207876d30e5478e798177d7f1e88030c02b1d0bf1609a0e39. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEQ121536630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6bd2de1cac2e35b7a1fb908638dee0ae753f30f7afbc6e8da59229e160e7d. 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/DEQ121536635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab19e25f196c60374c86039e1367aba7da0d85e9a0d4ac925252ddf634169344. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7811922258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7095c82efed09d284c38e454edf0c64c4b012df875fb5598aa60ea6c5ff97dc3. 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/CH7811922263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289542280c4bd16cc1283777408174078ff8d6374aeb8ee15015fa6fa1f282a6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH7811922259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a15b638ef2701afd0e6955d871234648a0f1e38d0b4c797f6a31fa2943b884. 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/CH7811922265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c591404103f84dc19cfde590d6f2eef8da910451eb1a299006a8fe231383cc. 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/CH7811922269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3fa303f8900f8429cbd8ba57c81a4bd1c42ddba354beb46d5f40d923746a4e. 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/CH7811922245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395b84fcc5e11b002133246ea5340f34583f7b3698ce2f90cc052956b1cfbb36. 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/CH7811922248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e41e6daaef06a1bd1d0a711ac6a2225753de1c98e137529fa7bb267ffebe7af. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTBF2329051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1938cd32083544f6818f609bc4914d1d52f651e3fcc5528c523680a72268e3ff. 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/CH7812197831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d84e542f6d8e0e16b6e20130f73c4ae57606c7caa67ea161416d4535105eab. 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/FR59R2500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5e3c776bdfbcba309ef7c3da41b06d501e1559f28481d3529e35f9ba2ca021. 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/QZK6G2376056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5d842e5de2e905834bc13919f035acac0d731f73bf70bc26770fb8335c498. 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/DEQ121638931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2775cccdb49050588fdb7e25f9536fe10aec503f7fb1edb3e418de6343685567. 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/DEQ021803456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75afdcea54257d1fe14225973eef2cde84c1976fb30c8aa421d748d1edcae86d. 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/DEQ021803462.