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 0x9e8e85c4d83dcfed0749c899105072d44fd9d3f99359ff8c8d51e73933e0fb78. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de4559b9-1a6f-4009-a665-940aea0441b2.json and https://artists.proofprofile.net/proofs/artist/de4559b9-1a6f-4009-a665-940aea0441b2.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 0x17747c72a56d685da7d96d8ea1bfdab1518bf16ab5c7b4bbc416fb1d6b87e7bf. 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/USGZ21243951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8daba3ff35b0247942ee9d445568634adedf5b8bb1be50408eed5744f48e2cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGZ21243956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a20db4b97c050ce90102c5bb718b0858b5bcdd09d5066cf925c429968a5ec7. 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/USGZ21243952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf5b8d0e1f5484b9900265e3b73b52ddc754f5ac5fa63c15fb94499f8cffe5e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGZ21243957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6fc5aefa0edae36c0a4945fa9f4b57b2b1fd077880e27418cb35ef1a714d48. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USGZ20929872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ff40874c3945b68e8dede89c2d8d18ef3f1635c53a1382e17849958971d458. 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/USGZ21243953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cfa9e8e82f707f6c26a9a73826c46cae95e8b74cb3caa62fc50a3ed260ff8f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USGZ21242381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd8ae50750fcf0b99edbdf97cfadc3611f609357663fb2af96148d51abfd2cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ21240963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c57fcc954cd1dd58dfdd883de175b5faee551fbed6b6f0503e67da6fb99fdbe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USGZ21243959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66934942808d8c413e8998940cf0411e52cd175cfe97c9d44b3baed0ad87b2d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ20608221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9696bdaa897cf8829d278f0e613572359da078538265b82f74f0af8f8fc3782. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ20606292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9940710a75066769ad0bf3e44f9ba0f9472ebdca2cd4226d7209308c69958e55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGZ21243965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f355409f5c56df0c0aef28ad6bfd0df339c72923abd6b1fef8eff32644a2985. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USGZ21139302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83582323ab47468bf7fefd36640e2a115658f677b8e037bfe9c7083c172ba996. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USGZ21243966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008725920672dc9af20eab708930655bac3d831541ff5a3c79f920bb0488deaa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ21243967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119d9e50a0b1d6cd14bf54c2be5ebb22ae1090f06071832c815a3db920d71330. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ21243968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda564ee1ee9ea9c6d12cac94978ca368a882c4ccac9a8d7c5045ddf4af42bf7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USGZ21138609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de5c756cc9c50b3be5bf0c8efbed4a99e52e8b6aea0c22e6e9cf7d36bf5f126. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ21138308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8273f19f570e849716ee6a874c2c52ca5f916118d49fec4d5cb2715294216be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGZ21243790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b8e6a1cb71feaba7115097a49dd9ad2087eb37986ef81792dd4c47df6fe9f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USGZ20821145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be541499a2c1542f6164cc734c63c0a6d48f2402eb3cda6fe8b61140a0d8ea1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USGZ20825485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52592eca520eea33af6b86985af5ae432debb98689e80cfca3fc0a4ec50cb5eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGZ21035239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe898c54bdffdb3a1cdd7c952c5e7add144030dafb6ae1c0f94e36bd4208997ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USGZ21033869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb43b6027b41994e33647e6ba06474952b876900819efc086d0d83fba5ae903c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USGZ21243954.
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 0x21dded36f4c776d13da8c88ed46eb36db40e59da31b629b3cf5154d71d64c0bf. 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/USDSL1004201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d36abb0db495e1969bf8fff5f9859f3eceb7c863b4d8505a56b2220937cb9fa. 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/USDSL1004202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7643e924c0ce711b9ff7d324cecfa577ec1f84bc47333f0486814867e21053d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDSL1004203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe30b67b8b4191d08caac8800b1d4bf110162f9732299185aef40ac45b5125a6. 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/USDSL1004204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c6243ade8bc941ef42a50fea1428d3b4de5e7ef29793c5d24413d76b294a9f. 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/USDSL1004205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1b5121662eadf9bb8d99155a6f34a4bc414f56a009f6c8ba8414fa1c1066ae. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USDSL1004206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7423c884da36892e742244fced123cff485b9629762e65574f71b1465b7f0e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USDSL1004207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae66f0ddd7718eacd92cf525148e098312a25be98f9710b0dad9d88825ae728. 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/USDSL1004208.