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 0x1c8f4dc4d28c4e316776592ca3743bf96884c064302f8fc808c233bd101c8755. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c970f30-72d5-44e0-b587-5b9f05d38c33.json and https://artists.proofprofile.net/proofs/artist/9c970f30-72d5-44e0-b587-5b9f05d38c33.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 0x8599c6fe49f9212477215adf8b07f608d351f8b95ad0e544ef583d847c856007. 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/QZK6H2332102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c10c51afe76a2d444b789d7e40ad71f3f0b588723aac7f05058061536be52b. 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/QZK6N2339921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf479200a866b244bbe5480936e180eb734e664b051aba951e2eed09f605552a. 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/QZHNB2343959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed16dfb20448e8f0f55c006ca3554cda49bf3118909ac4286bd13ff148ec8f13. 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/QZDA52327086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358a8645a1527eb67719fd3f8de44ecdb8643cece5bbb4c1bb603920d4be2dcf. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZFZ72317310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d2b7d3fff4fb6cdc261dae5da74f7686b42f2f894f5822f0910d18c0478122. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZFZ42302300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da1b700f24b2502e7624eb86157d4b63821f9ce97617679c29178ae773d87ef. 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/QZFYZ2344563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e92ff029291e1b455d35579795d218ccf3e831be5fe4060289c5c413435e6e8. 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/QZTB72222172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e7cd87d62834c49f46e5d6dde7b64df888d9480417445af920df7001118c01. 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/QZTB22266868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe22ef0a528cf70780d3412cc991a601afe94398e1c5d15f5eb4d73e07d01619. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTAW2293942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498494e32750b2a83dae5eeb311006b639e83a259a4d72232ac526015fd12141. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTAW2293943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ac54919850cfaab67ddf47458dac08a3cc58e3a846c66d9a629dcc16db2a83. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTAW2293941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08b53f44bd1f6122a6436b5ad1373bc8c8233c55cb0e7283f6267be32b638c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTAS2232187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5305055af98859fded29b520174344e133da42d95374eb96a5039d173163eb41. 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/QZNWZ2221045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21adcc6c183e86f616c6f98840cf2259758ba1cfcae44a77f3b2454827090d2. 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/QZNWW2202228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb1429f33af5e5a45918a143c861581f4e2bd4a45590fda954c61c96e25267. 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/QZNWT2219204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ae5d2cf8ce91aaea256b6d38c6e7bc6e1ec7917fb7eb4e337ce0654a8979c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWQ2256295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb89893b38bec711167dd711371a0fa74fc86112770f4e819a4400907975da3a. 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/QZK6M2288792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c59e780c22b7965ba644dc5fceed62c49356ff057c9e2fa6a7de3c43c4449d. 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/QZK6M2288793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb93d14cf41e83079b409f251d7d9300008a1902697d40e0fb058c6385f5029. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZK6M2288794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4653d063ae5f084b5f980ac74285a191a032324f76939f1c6af01f776a16f0d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZK6M2288795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4462f14e15c2cd866ecdfe58522f6bddd3b46a458ccba8b7b478c67e8fa4846f. 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/QZHNA2215758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b45d16db099539f8932bcae4c7efcb8b32ccc509d3388664a8ad6e536e57d6. 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/QZHN42200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20440f33974c0172c29adf57efd83a2a759f609be8e80d003c616d0801ad07a2. 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/QZES82253343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8753bdd1125b51eed894d72c4997f149d7ce481e210286fa081a58a4151e34. 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/QZDA62252598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4308ef6eb98bde22a675048f78722b1bdebc630db12d2e1585f0b9590041998a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ72224887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c67d38d348066600c3ad9fe07b10cd88b974bd0cdb85b24b94fb40d89c57a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ32256545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b39e98f11db07fb22db67aa01db943adf2e6755b115402cce5138fbc01d93. 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/QZTAU2105520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05146701e8edce8cefd64faaca64b8598d1b8e165541c7b8e2b6c1e7b4a06c9e. 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/QZTAU2186089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4504818fab21fbef37cf641c098ef2179cf98eb228a210aa403e35fdcf9e79e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE62M2170223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50545500864d5f059a2b95e039388edb422877808b397bea937af04d956e4d9b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWY2190433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0588d1695bc7dfa06a570bdb6324c967b00e1446a3a51545aafab728aff0d1. 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/SE6XY2130442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9e80b1cbf95cf1fede675d5d139d0258ad1207880193ba939eca7dc8222fcd. 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/QZNWR2162984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b00bfbc7e47e8d7b5e6290ba3a07bb16e8efc0f0ebd25a5a4ce9fc0b5e771. 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/QZNWS2141116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5100ad14662f394463f5911bf8e799b24a3e394201a8b6c7a815ab2e7b01a49c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWS2141115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbe3d4d3674c04f6c7897959cecb44e33b4270d74eeec45bb24345c4922616f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWR2105457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e86d8f7755b2f11dbdd06df0479af51f28d6f64e97d8c5d1f6c96b3c90a13e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWS2141117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9743c61b9f31fbafa5a1115b40dfdb3c599007f943fae17fcbb6fd2e4cf4aa. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWR2162990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b063494e1aa9fef6e7b0627b08fcb3ee7f10fd273aed8f690203f6fba657fd4. 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/QZK6F2185680.