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 0x8764e1fb9cd186dc73ac361039c7d214d6ab251ed7aad56f4821f18098948915. 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/8c01eb76-038a-4da9-9372-25455064ffff.json and https://artists.proofprofile.net/proofs/artist/8c01eb76-038a-4da9-9372-25455064ffff.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 0xcbf4aed1bf61fb9dc58c125f680b8be953d29ab3274ef598c869523a7bbc6a61. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:02:58Z), 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/QZNWY2574506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53af2971a65dc97f7abd2a289c52ca4aeee4af57f97033aa47aefa0975d99394. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:40Z), 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/QZRP52561496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd26264d9784d9161d3b7e96c9595420f09c3d7e7b565e315cdfa2e2754dbfe. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:22Z), 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/QZRP52559372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebba8f6488ea4a7759b2f5aeaec5c192d67fb53681703295f018c353e430c68. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:43Z), 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/QZRP52561498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c9b5145cfe572119768d888a4938b344fb9b418685b5e0e1ae97a5a9b178e8. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZRP52561510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feba5d0906a624823df0740fb9d35eed74c4d40efa53bd4ae308004348904f6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZRP52561515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e62003e7adbd7fcbbe2450b0be8b8ab5a84c221a0eba41497e4049f4b8a3eb. 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/QZRP52561504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a90fefea483eb2fb14a6c34aa23a0b8bca2a75fbb97129e146b7fcfd729a4a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZRP52561516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9293be1a831ce6ab2bb429c0103b85213a3af125330e83b9965cfcd28305ee82. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:45Z), 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/QZRP52561517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc49e7ff4901d34134dc73e3924f0269f94480e5406026bd2d086f8a1ebbf47. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZRP52561500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86edbf80d4c69d88bb793973c4f60b3f3ae4e61ab460b186daea60c729587730. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:11Z), 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/QZTAX2541372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6301a903fa840e02623599612346fffe47b9674eb14ddb46a685c316cd106bf7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTAX2541362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb4b60650430b8fd1472bf5549dee80aa72efe6b76f5b34ee06e27e5ca5a52. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:50Z), 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/QZTAX2541360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b527946af78bc68ae85699b490265f221426714506d55892ed8f944bc68deb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:49Z), 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/QZTAX2537947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b71ab4b4d4c71c2346c4a2afeed53137e96af16e3da7cf0ef6fae505edcd98. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:57:45Z), 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/QZTAX2538091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e96009966629ed49ec168208eff2623a22f3ea7e508f03e5ca2eef0859aeb0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAX2541374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38e322afef096487b0a7d81326d7ff237c1c309f6af899ef970cb08481fb3fc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:51Z), 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/QZTAX2538157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdb832bc56f97ddb13ed8b79f3b940056de336864e8ae8f567363550eb572aa. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:27Z), 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/QZTAX2541361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475f96d30973c8572d109d3328dd2546c6a77044184b83d7c6bae55b41a18e03. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:29Z), 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/QZTAX2541370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba04bacc2d15dbad2406ff3d38dab00630024c23c0e34f4d28876bb541704aa1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAX2541368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407c6294978a416c8560d8de0343fc39aac9d4ea7670369300aaa1d9eb275247. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:37:52Z), 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/QZTB72534410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d7388acb356c4dcd2771d93f191d4e992a32eead174cbaf40ae42c885e7265. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:02Z), 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/QZTB72534411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6fc44b905b0a8a2dd547c01d08458d8ab901252d74bf0762df4017a65d274. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:51Z), 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/QZTB72534409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb1206f6f9e4fde78db79290a286cd701ece56f570bc2a1bc7e639132aa2324. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:41Z), 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/QZTB72534413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6b8a1744716dd71637bed72ced62defe564a4239bbb4a49e1d7593692e1dca. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:24Z), 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/QZTB72534425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97603a799c133378d6044f7b1572a3591552fd4634cba6d19cbd34b3c0c8b89. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTB72534415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7d365e8134f1fdfdf321f14d8d832831aa047cbd00e2d3bbe782cca9efc281. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:46Z), 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/QZTB72532631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019c0292ed4d854d01bd05faa69b3fe1ef554bad85ebf68159ba925a940dc55e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:34Z), 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/QZTB72534423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe4ffbcae16c339b037ef91aab404d48202ec8a3e1deec7d50c03b6f6bf1d49. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:50Z), 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/QZTB72534422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f44f9cfbaf22f1e5ddffc1462e8d75c23c20c75fefafd37438a85a44d265986. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:08Z), 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/QZTB72534432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d5a6e6d93776f6d40822595b220b29d21577a886ddcd7d9dc95386fe7dd87. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:18Z), 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/QZTB92543054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2886981ce73c79175fe41aff95e36c015a90ec37c6a18a20c38c25c3a8fdfa. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:19Z), 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/QZTB92542914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b7a3c98b8de30dbf9acf4b4982d5382bf87f8f664a105aa4be96c8e7cc774. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:05:42Z), 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/QZTB92543003.