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 0x44067d45eb0d8581aca08f2625ee340bd0aa8832feb5ca8715ab971ea03c00b2. 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/09b10aa9-0b16-4601-84ba-3f263160f33d.json and https://artists.proofprofile.net/proofs/artist/09b10aa9-0b16-4601-84ba-3f263160f33d.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 0x1e72adaf3bc43d7f759a23e7bc08ec7ca8472c61c5b05139a8cfe2f1e75f6acc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES72235691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6edf3678630fa415a3bbfcac077d8d4e2c1714619dfe5585220f423decefc32. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHN42292194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2f0404e534a24f3245407d709bf32a3af43a737fbeb263a1ca95f27faaaf5f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWR2265397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71f1ca6da20d5189e47c57b1eb63c2f3ac1cc0ebd353abc4703767faed1a698. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYZ2363083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c1a4e74a770bbc3bf41463ea82613ae899855d92608a39b8dab1ed2bd0ec9d. 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/QZFYZ2365623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f558383bb57da4d95f1e21bce4712814f7df02fc9b21e271922211741c59915. 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/QZFYZ2365633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32d1e0381ce30b82b2681949e96ab0598595bea0b8235b31b0e5e018e0b6847. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:26Z), 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/QZHN72322912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42554ea752e2b27544b95c6e3915bd47f90d9d09b99899a6752037ef595408a. 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/QZHNC2312187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a8f6ab13b7dc801b9d8bc53c921d4d66fc41df99fcad3b1fa4cf4c2574481a. 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/QZK6P2352275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b1462400aa118787e277491a0bffabddb8ef0ad0a6144bb1300be7beaf4315. 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/QZK6K2385446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743012eb0c749461a67bfc7a7dd3255c40d730be9cb948377fd83daaf65bc9f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6H2345107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402c75b53bb3887b967f40ab0c17335c26ee43ba180d99b907a4cd98bb2d737. 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/QZMEM2301877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291296de6b318f3a2e9907d305f96ee5b50d7abb11acc7c4cacd198c01796fa4. 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/QZNWS2380829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b420d914d10dc1ed88944b9f613f78df495d14f090926934ba66f1541f13b9. 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/QZTAX2345919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91277ffca6cd7f42982d8fb72189e47cdd2257af080284cf27dd1426fa78fb5. 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/QZTB52323697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915358ed4c9b46bf528416ed125839e4278a57bd95656b33f5463ea87d5a733. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFP2398755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ee9f98b7f375a61858318c14daf44652c3e69d948e3e5f67b3be194abda94b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:01:53Z), 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/QZFYX2416184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d3eb136db775c5fb57826c4b185793eb4ce8f494d0025da7fa4269aed2b47. 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/QZFZ22435346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc35da5c8477b7c30e5cf0dfe345f565cf6d73cc365b8e46318c42db06e5452f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72448103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c9c3c7e295fb25d833ae284d7f33a7d0693b25b7ef7fc6e117b20c7782ff93. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:51Z), 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/QZES72442885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716895bc5a26191d7b954fba8f756be12bfc1416686a52f9bfc7005d6eca7425. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6N2455219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2d9770c93c8c360351c73328ed517d4cd2fe1f8db0c21e9145ec826d3e9e60. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6F2431679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51b70923c95faae768d93fffd0a2d6df182767193455b8af3d3a7a05ad7cea. 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/QZNWV2466718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d820d735e90fab79b49fcca3882cb0f40424e9f791695ed9ced5bd8cd396ecc. 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/QZPLS2479585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40293929dc34daab67ccf057c9789548d585ba3b094d1802594686c7a3f762e. 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/QZWFE2485303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060558e71a50046480182660aacae623da8f7c65cf190d3d8b1d6d953579f597. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZWFH2438802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8953e3a954c70eb1f4229050f04c559584669df04e1fe9a2f3b8f50a6f379c77. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFS2452616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6efdcd459ecf93658acbcefa5aaafdd62884ceaa43f46d921a9efeb01a444a8. 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/QZWFX2415031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f979cd38f1c6047b9ed093257bb1566bd5a021b2649509510b5b82aeb5c24ea. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3EY2452720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205ffa05664d2a30a368c3631e8ca7cefc8e6f6d7509dce284e817b0c360d534. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZFZ72565538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07fc691836fbdf14b0523c665d1218c24315927eeb9a1869710d6511ce0e845. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS652288667.