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 0x291e37860023939ae517432cd9670a2c68f5670191b287ab367dbdb4f9ba69c7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dd4eca1-275a-4070-8673-066ce2568868.json and https://artists.proofprofile.net/proofs/artist/7dd4eca1-275a-4070-8673-066ce2568868.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 0x9666daaa31f0ef5578f6e12233eabdd4095bbc929bdd70ee3993978228a3f1d1. 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/QZTB62446220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb443c410de35714537fc9c28b5b30d898d2d01f1b9ec07c86126f9d6408161. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBA2473397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310d9c35eb30085300d754dd03d7828379506d5f6bccdeda1ceae78f7857651f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ762452943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24188bb9fce86ae1eecfca83bebd56aee2a4a17dfe1a2ae9a49247d48ca0b366. 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/QZZ7N2458740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e4539e8745af70c0081bc44da2a26d37d64eb8785166678473828791254d6. 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/QZZ7P2436794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d70e70348bfb9bfd5a62a3304f69332d65c05fbd1d337b4c4955025c03d819. 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/QZZ7V2454765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4fad74163b3bdb08328fcf3024c564697f75308d20dc9f23596e0548500d2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZZ7X2410380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae3b6d1b4408b16fca2f5849e6b55cbafb660a05f1123627e3217555ed841ad. 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/QZFZ32589777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ce5cc68acf27b37f1efb3deab7b9c2eca7c09aae0b1e60e5dc7b00dc5a0f6a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:37Z), 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/QZDA52563894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b83addd5853e6aac640838bf6e23c4ae84e60e80f71f52cbc59ad34680fe1. 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/QZHN82527219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023a95b897814c84bc407bf2d51fc2bfcc0afece1a6b7c3f733320b8aaed7da2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA2587623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22c41ce6e3be1e8dc83e06422078661a6be6ba178143c8f3ef7b72a97fcd97. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6N2587689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8c68a6341adbd3d049198dea5afd449d6a972cea6c1cc69d44f3037715ef4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6H2562714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58194127615f4c78b00b0874926fbac1ee6b147bb0fa8307ee76d4ee439f230e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:49Z), 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/QZMEP2562048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99feb22a94891a287047fe2a18a2772393522920f1ced0b23f1a33e7bbafc3f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:00Z), 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/QZNWR2501073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef56c76f2ac4912aeca1d11f2f1da3a4dd7a72c7968c1c00e36fcb3609f5e98a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:31:16Z), 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/QZNWS2550763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dbbee6eff39904e9077a07623be28fb6af22fe114781bb4be720e7b841b355. 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/QZNWT2532752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704b0cdc961abd64976121e5166c222c9409f115a302b31c60047b1441d9989d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB52522174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249b91072e270d980efc52608a92253c4dac80f7be1f1c36d4dc9bee4df10bc0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB82539692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3294a09c758e5a020bdd844d400184cbb415e835eb7461359a795dcdca0ea746. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTBE2588248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd30147f537115144cff60982ff59ecd79294eeda976a1418b0e6361121f4a7. 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/QZWFG2549963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8f7ec9cab274e31785494a8d98539757cc4012c15de06d56cc48cb7e3887de. 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/QZWFJ2581802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcd0c77dce750a26796588766d175c83d47b533d937d6fd30a146e738e0cf8b. 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/QZWFN2508332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfb7509d324b9c81f1f6fce6e06246f0ac861cad8a2c468ca37811e75c62499. 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/QZWFR2579917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a7b797e7e9b4b7442a109e7f8f653cef1876a79210fb5e38838f2a34d8af7a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFU2508762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf418ba64225aa3ac3f290442a18ff9078813ae06dc1a2326a424a1cf5f4975c. 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/QZZ7T2515087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6af273074c07a25f93372919132de18b2f0cfae81d72722e73c9bcf0826b38. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7X2528024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68f3db480ac404a0b55d0f8ba376bc1dd6edb621161d3d50b8f7925fc97951. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:54:10Z), 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/QT3EZ2563367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f85a0b0a9b33483a1f1c801b0ee6802e7333d3749049311fcfb806f163c3f01. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:30:57Z), 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/QT3FA2580669.