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 0x8bda540985606276d0572be0e77b1b7a2ec40efc0d92247cd2e204b0ba7d8429. 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/2efa1936-990f-468f-958d-4ac0f0ffd6bf.json and https://artists.proofprofile.net/proofs/artist/2efa1936-990f-468f-958d-4ac0f0ffd6bf.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 0x323cde7d74236ba111a771301472a6f2e13f69bb7e4d5fb1673ee2db8cc5f342. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJY2352416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbab7d99b010993182bd95e577e76fba12b7322a4a2c81169888871a61f5abf4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:24Z), 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/QZNJY2352417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a7f5447b57b5f80f4177461466ec31dbd26405ee147029f1abe60b15e83211. 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/QZNJY2352419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fa229dd0dfd1751406b0e5f1d046ed427efedfcb9a5aceade83d9159718b21. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:04Z), 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/QZNJY2352420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf1253ac2f38b3222c87a455af779bc348e68b2bd36f531b69dd53fe999d420. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNJY2352421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d9df2d7ad39592af4920e91238b0b7eb08e2e430edf078ac5a35d4fdfa3b9. 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/QZNJY2352426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ab1b988e03487d38af22cebd16692072e6e024a4bb110213e3bdb90af324f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJY2352427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e26896d308a3831114348ade916ea64bb1cc95f91a6c18bbd57d4888f92dff. 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/QZNJY2352429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf303696aa82b3de89f08a8cc43525221234216773022f570b2978e54134edc8d. 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/QZNJZ2340933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db475457686b594c941914117af0fb0ee37ce3640731d897d6c7a90242699d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNJZ2340934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb979d9d38904da16c71e0dff21dfcd892c65463a73f0287e09e32b3c75edf62c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJZ2340935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ddbf3e9dfae054fc54288c1f3e5fe9c3e355d2e113190ec5fe60eff6fa27a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:03Z), 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/QZNJZ2340937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65705e90287116f0fd5a52c74d6c988d84eaf643beefe4913aff773d7bf8e11f. 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/QZNJZ2340938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad747f74ddc5e33e9f971bc01796ecfc4a4179c1b956ec88a6827d606d5e276. 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/QZNJZ2340940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1ff21a4c2f6b1634bdfd18480b80fb830096eb395b95621a7fde8416f282f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJZ2340941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f9919c222c97ba18c985a6f2d5913975c8730f71065f2f000449a0452cfc4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJZ2340943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3f59bdad6e3d1eadcdfe7282c56e7c50e112fc1a49cc0ea2c17613e350d98f. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZNJZ2340944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cdbd2f53345a4e73e1fce080d9829572ec82b0e90ad4509168019731f176e0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNJZ2371442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953a8cb51bb4b0f2abb3a5d4859cde88958c929bab4ffae72a4fd84122889cbb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNJZ2371444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846ee24d5e4e07c40e1c79d1044861e88ac95c5cfa6af76f6a37b585533294e1. 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/QZNJZ2371445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a59cfb93979ff55fbb2cf6a78b1e7e31a4666d1d93f409851610862ec17303f. 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/QZNJZ2371447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb101b7c42442fab7f66e686a47e125945dc54c3fceb17afacb1da5d7d2d5610c. 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/QZNJZ2371448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2a5858fe3d289198ed29a9d6ee8e644c4f2045fc9f02a6a32df96ddacb670. 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/QZNJZ2371449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc1e7a807dd7946ce5d944d07f2547238db01227f0a62f2f4c97677c5f36b65. 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/QZNJZ2371451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d5d194bd0ef28d8a31562f708af55710ec9ca55320a89b16d47e28a099b50. 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/QZNJZ2371453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5e98d321636fafc1d6b84a8386b0c95996e021ca05c3e7e927f0d705196788. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:33Z), 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/QZGLM2428989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e9c79b5ab3a47bd26c385c48072f733ccbe6768ee8455a113bb98372be4a54. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZGLM2428990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a66371748381636d951115394f085e9ebd2d2acf76ec020a8f8f17b61328d93. 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/QZGLM2428991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b778df24c7854d5915aef0cb40fac767de5df242698630735a245b4b6162455. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGLM2428993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0a1a26bd086f49ec1ddd0f420bef2fa713a37389a620b22dc14586033d44dd. 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/QZGLM2428996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2d0f14047a4a03b87f874ec8fc7ed7283cfcc3aed11ebc0c383dcc7940ae5. 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/QZGLM2428998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2747076c4155232d10c40cac57529344d41b968b7cadf1fe2fd94c0c98f72d67. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLM2428999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbff15ea46e8d8840ed5a084e4bc1dcae7b06c2467ceba8d22e6050c1413f3c2. 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/QZGLM2429000.