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 0x76ea60a789335e3b6d96ac5c89e3b6ed02431d7794864c9a5262ffb7ab1010d8. 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/d44f8954-6b0d-474b-ac43-036327246008.json and https://artists.proofprofile.net/proofs/artist/d44f8954-6b0d-474b-ac43-036327246008.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 0xbdf9d7101f40158af78313df9d83b0cd0173ef3495fd331cafbd899088a46c89. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKR6V2355231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663814aedf98f2738b66e35ec82eb5aa5738e9c66f1066645f668311d47b8a41. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6L2360845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f84b7b5a21de9cbdbdabe33d62a530784d47d7c291841467823cf004d180698. 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/QZK6L2334059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d4e34f0a8504198bcc4334d94e43025727a70ac9844d4e9ee2725e8dffa5d0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWW2335205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56d14ef97c8fe3dee4c2c3c7f520d7e5fc4a8b1ec4404e0c87f03b4685e4f25. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZNWZ2364744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f8bd252b46ccf8108ffaf68f1ddc2ea0a1e157059c90bdfa551de1e497baf3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTAS2335467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebd18e5ab10425bd9f76c9adda83807e642ed9186d4781844657284896608e3. 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/QZTAX2347221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf12e7af748f38350122b572fcb77fd28ce7a74b149aa15cca82c4a0649d7bbe. 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/QZTAZ2325000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51fc3a68cec6a445617aba8912a899336fac31ea6958566a4253d273e6ee30. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTB32330967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a047ebb4caaa142f89008e50c065b89b117374853bb61861fbd47209b50e63. 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/ESA122441899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15998736301e01d4866a23f8924da135160702f432a168bdcaa4eb735c34b56f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5752461950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e9eca08a8e4ec0900e71257aa34ea15aa53ebbc25157bedc4f4cb82a4bcc3e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6HN2408797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711b2ebc87ee7a5a8e5cb620fb0deb05ff05fc0300daee688e97c05110dca413. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/SE6QE2446929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2c226934ea8d3e470d4315a3a737113a91088d5d0a10fdb543120ebadd37ee. 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/SE6QE2458229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a52c8cffaf0322cf351b1a39384b5565fab5571cf09f6bc7636b9e40b2cc618. 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/QZWFL2443102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd9c183d0ce33e57c6e4c11522b5df7aae166cd70bcc8f99225d276180bb69. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFU2452208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e567666402be00873d4e14a06d2a8311b4d53a26f8dcf382093375a9ffc3086. 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/SE6SA2488275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1861acb8b71a0575d1bdbd5fe89f1682db444901379272a86e5b996cb240ffe. 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/SE6XW2411424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaceff8b08a6530c7f8fa33bd5fb178aec09f3d43f32cd91bdbb45b1f625ca5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/SE5BU2520380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa441df425f865714b71bae07699c26baafd9cad0260a4e1ac711db373c12ba37. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZES52599791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e2933996a04911d7463610d068555736bd0eae7fab12261e88a36fc811bcc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5BU2556525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4514e2a432b57d38876b2d87cb513c0c0b5be4644bc105a812c0ab65638f1f2. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SE5BU2556526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8a52630cf70cc51cc91198a081288d9faae99782bcf751e9f737c165a5a415. 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/SE5BU2556596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2943f8a53fbfcaa7f83354a5b1f3cddcd1115ee07e6fb9be830bbf2bb222ba. 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/SE5BU2556597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ebcdb45550e87d4d0a7cff04b333013baf5258f5f6572637ed3b4f0150646. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE5BU2577314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc4f6df29079c2461ae4cd61b1a57cc73c252eb57b301c91611d38598d27a96. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SE5BU2577315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09271cc3f58fa6cbc24a2e5d783e9516552a1e770310cf5c3ade19aca4c5bfed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22572688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c094b70676c37fa19371620a6d2773fbc1eb9dea990057c2edf6d9a72ecfa03. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTB22572689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531442530933a720fb85e684a1905a0a988be045063281c16d9eaf441853cef6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFT2531321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c4da5dc261362065eacf84a2552ed21491f2b3a978369c2e5046e5ec8528eb. 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/QZWFT2531322.