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 0x8f526510ae6b860d6a7d5a38336cae09c011640e8fccc7d52a3daafce9d5cadc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57e65f5b-0b9b-4b07-841e-9ce4e96b784f.json and https://artists.proofprofile.net/proofs/artist/57e65f5b-0b9b-4b07-841e-9ce4e96b784f.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 0xf3909976b257554e823bd1a39d100009ef41f8a0cd1a573c6012c98e94ad66a0. 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/BXD3Q2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815fbb3ba6211d0d61cc2ca5c94c18418ce4bc721182bc6eb1ef746d89d32f25. 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/BXD3Q2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba59b1f60ed14ae826a7cc8abd0648c35fe92af69936c5f85cb145ace2f52c9. 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/BXD3Q2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cb1ba3b09a74169bd6f248b2692d7d64089df2a51a35637249bcd340b198c6. 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/BXD3Q2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2851110a75558768cc2953bdeca1cccda73da70da011c3daa54337b2142d89b. 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/BXD3Q2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc147639372a95c03f505156858260e8b16b770f424ecf5518aa0d37c95abaa30. 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/BXD3Q2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c0ac3b28986bd29ecedf28bfb8594ca0e02bdf188389c0a866a6ea82e9f585. 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/BXD3Q2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673297e69498503b1eb552ac7bfde3df13145968f3499bb48e2d11054e7269cf. 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/BXD3Q2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdae4a9b10cb7fbe6a7c48153b8088b5b7746e786a6a2316ac86e9f0b894150. 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/BXD3Q2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccc4f650b4a2fc5b38853637928c2cd7e85b95c859601501a5e338aac7397e4. 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/BXD3Q2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f386580f92374a6bf17d3e9877fc44983cb42aef194a56a00ddef3fbdeb4146. 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/BXD3Q2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c650b1f14ce335eef677cb4e6bf1d839f5f052413273f5277f5a1d3c6014d3a. 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/BXD3Q2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6f746a537a9fb94311a9b6d85395fe9777cb4f9e085c332873f7d474efaffc. 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/QZ5AB1998307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51afa895e21493340896f5b72d20b21c3ede8d7f3db64550b6fe461b428ad876. 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/QZ5AB1998308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a76560753343f2aab722f1c35c32900c4037d5d192c6e0e8acfc8e0d36efd2. 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/QZ5AB1998309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6841121d132c6445c558abafc6e1e5293345860ee2d9a9be29a079731c63aa80. 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/QZ5AB1998310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b34de4e18de149d46f9baf3733224bbbfacaf42a6ada408b802c9d5329fb04. 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/QZ5AB1998311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc3b7ac49e1be661010c58fb903bfe7a683f3c5f6e0031ada50f11d83cc1719. 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/QZ5AB1998312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0319ca0a9986d24b8ffc8f7e5bb7658982a9888280c04a9fcb208345773247. 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/QZ5AB1998313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d014aa13ff9f23701464236fe032cdb710f436eee486567f98e5c7147bf882. 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/QZ5AB1998314.