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 0xd6308593676333dc27c84c97fb2b43fa78ab3c8149afd334b242a7a1d9f0190c. 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/337db79d-fc2b-4a37-bccd-32df47eb1287.json and https://artists.proofprofile.net/proofs/artist/337db79d-fc2b-4a37-bccd-32df47eb1287.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 0x0a25d689978e957a041e678f4f2a715bdd1c2d671ebd68382f4db9d1707bb9eb. 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/US8392300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033d63ae52919e2f9f33e4bc0057f5c44fc6e502c2352b29dc817bc318f60720. 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/US8392300177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a30056f7e72d5e26368ed2d842a14a8c7db20b3bd0f00165171911a38854466. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US8392300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb424d30b8bfe0173a25a098cf9890cea77bdfdf9d0394a05c4f6a054d5337dfb. 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/US8392300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc310c05e4389fde7dec889c526f08a659934ddb55a5df01b0705fe069a93f6df. 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/US8392300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fff86cdebfcd118a7c0446fa3fa0706b8152e5f5c8fb41c7709a81e150ae7a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:57Z), 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/US8392300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfdddac59b4f5703aa315966e007e526c1f17ad53b96adfc2aa304b7158898a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US8392300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee74eab4cd41e8eb23de2d701903bf8f009bddb1459b6a56b777e47f470c225. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US8392300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebf8199a65579bde0c82f690b7cdb94e6790041b88e9b30b30a283f2a967fef. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/US8392400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9165a75002febd955baf782298b9b55716c68279c7b91971612e3a4e56668e1f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:49:00Z), 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/US8392400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddd64ed944dd07a91a5887f8449af635cea30e901843276a848d3849178fc65. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:08Z), 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/US8392400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6ae1c83de187317f82af9f764c383677f40aae7081eb845830ed8030520512. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US8392400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a21e67af621ca5eea5f66392586cbd2b4cebc0ac973117fced6ad89e3092064. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US8392400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aec57cd74abf340247a1529cf640e730cea2fc9fdc07cd17d30142ed1303a8. 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/US8392400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3918d1d532cb2606728b75afa11ac48053c9fd4cfaaa0fbe40689c8f5ca2c9d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US8392400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba0de4f56668ec9715b566781d8b4fe3af2b6014efed322ead911bf86c1af6d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:08:57Z), 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/US8392400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631060765d3c1aee3e3df42009e7449b0770850018f715cb5513b79ae717bab. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:00Z), 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/US8392400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce6557b6881f71aaa780cf74dc746101a95447c7a4af5ee1b7d6d4d974aef06. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:30Z), 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/US8392500193.