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 0x5b9c654cb5d37260d9fd5f554642a50b8cf570f0a05b218014aff047605bf7e1. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/106834e0-8fc3-4ebe-9578-383956ef8899.json and https://artists.proofprofile.net/proofs/artist/106834e0-8fc3-4ebe-9578-383956ef8899.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 0x42477e0de03d6c2c57d193b3c93a9cb9357469ade84c20426d296fd64595bec6. 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/USANG1901589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92362af0594f908d085a43e005c044c4027aabd9571402df5db42524fdfa7476. 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/USANG1901522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4e8a14189779a3962bb49011341713acbce2a67e6622c3db3f5728447ac77d. 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/USANG1901532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e2af66abc8450b55701f819fe4896b94d099531b7ef0d91dd8c8664fa0440c. 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/USANG1901536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb343c5401ca7a9720827291a9865afe0f55c97fddd4bfaa86e8f8ebe5c813b. 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/USANG1901542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8783d88e5b1f88890078175c2e26777a01a0cdcb81bacb34c58c0df2d9da569b. 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/USANG1901544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d50040add2daba4e4cdaf0ef48d0d4a42b9cc4b0e8303a61b01bfe5e8eb42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG1901548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefab755eaf3c15dfc613305c96b4ec9a193d4a852c8989469eb595526ef888af. 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/USANG1901553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e46e5fd09babcef85c5d23019f2e472be284c62d9d8492d0bbbb43cd9d45e03. 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/USANG1901576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db777e8697d81fad6444037ca9857638ebebd9e879c284f62958770311d2e15. 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/USANG1901586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbdc66a312c4df705ff8262f107165f8fa848ab1cf5f43d581a06995440f270. 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/USANG1901587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ca6d864b2b937bc12ae900bc5a01d2ea8fc4acccd992bdabcc7cc58925e3dc. 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/USANG1901551.
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 0x52e0697b9b723331a6f59d481f679d9db5fe49e6162c5bea1174432459dd8b06. 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/US3DF1988178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9feebf159dd59e0634eed1ab4b42f48a8ed03aab8545a7c5160a86a5e70a90. 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/US3DF1988182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0533b45440ea14412b7826ad070a195881af6f4dc6cfb88bde5597c5aa30937d. 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/US3DF1988184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407342afd43382592b168ae030cab46c99c40f79edf35141c80f26fea4f37263. 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/US3DF1988186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd560c30ccd7c8ae87560fee0c2ae07e7add2992d2ed7543151590b98c0889ba. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/US3DF1988188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb27e250ad46ae2e65159c9b54bf77ad268bf31629b17aa05700179be77a708. 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/US3DF1988196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e70d63d3d240d9a1afea7e8c19ba72faee08576ee8a7c2621428b5f499554d. 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/US3DF1988197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006ba41acb1fcc02df74387cff75fafcab0b2d67b26a8f145385d5b190b5b492. 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/USANG1908898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db4dfd9da2c4123eb1c0671557ba14cbafc570de296fe37c96a21a2e93418e. 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/USANG1908920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d5ea2fba7c89a7d865357222eb617aa67cdb33cf673d16a920fb959229217c. 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/USANG1909370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc147449c50cb302fa121b036d3379f59c7e8c2eb42b2e98b1ad07d2720c428e. 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/USANG1909410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac02f31244250af0866dc3a5639284317f40a8077fb08983bd156c6004aa7b3. 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/USANG1909411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e5207b6ae87cb4f3c51f5e7cd500d060e20098e34c09a951065b64553199d7. 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/USANG1909428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31625bc3ea7760fd67139a287e93affdca9ccd201ce2a91269733472f5e463. 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/USANG1909460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c29574e5a0f2df59b015296b26f1246c4ab8b18db94694b18aff3dd870c55. 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/USANG1909313.