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 0x6219a8a9b707a3820e845c39225ab82f86d43e7bf53c158ccadb269a4f90be24. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fff5df14-81db-4e97-afd7-d7a144ab6c8a.json and https://artists.proofprofile.net/proofs/artist/fff5df14-81db-4e97-afd7-d7a144ab6c8a.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 0x1b422339c68298cff3ca564ed6fc37736f73ecba7d79abcdca6501faf8c6ad2c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SEXZH0800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ed4049ba026215442b9fe14e803114817c2b09b55718fb7f02ab93889c5bec. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:13Z), 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/SEXZH0800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c76cd39a28572b0564517420c4c793d047b9924f443d61a32c06941a6431fb. 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/SEXZH0800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73b524da1e888cdc882b378cec7c6cd1cdbebe54ba4b23e3f446b2d7bef6569. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SEXZH0800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb1bf5184b84e15aedb5cdf83d0a610a3cbc0e9856f1edfeecaf3ed9cbf29fe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEVSZ1201602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb29c90c3a32efd15bf84fe28db8f5d7296a4ba0b558ef12d799d11a49218b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:16Z), 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/SEVSZ1201605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a0f43f6163dc7c9b273025bbcd65d2d4d7f9c42509ec09709249fe639b0a6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SEVSZ1201609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d0ff116ac7b83d54350cbecafd7fa58b86e5e8ea38d9a3651181c52b43957c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SEVSZ1201611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a13de431a1e8eccce4467ae11c7b9182ca043722eb5ff5a427d4c157876d83. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEVSZ1303303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa80bf6f60b6834649fd84646806417edcf319ec9f00b8348eef9289086af27d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEVSZ1303309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914bb6d3305bbb61ca23120904003f5e22bc3ae0e8b839f7a9c8630591aac0ea. 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/QZDA52203398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f1240dfa21e5c089e9b00d0687a409bc2f1e7d7f8fdedfaa754fcb74761d4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA52203402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062cb3f383230340d75ae196ef31c095bda216151762d210899b09aa4f6fa657. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZDA52203404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817491f19788d43fdd2ce31951802d77b895ff5487bd4764cb9eba04c1f27ffa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52203408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac9c4dea6df5a371d64d9fafd9fa2810483695447d55e2cd823f97feb4facac. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:19:52Z), 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/QMDA61302312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe532acd9ebd89b4b7b0c66f677965ba2aa3473162f5519490e6f33e6671ac496. 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/SEVSZ1303304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe532acd9ebd89b4b7b0c66f677965ba2aa3473162f5519490e6f33e6671ac496. 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/SEVSZ1303304.