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 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 0x3614a3fcc12a6654f1a86e15d794b016c0f3f3fe5e401a5d66b2420c9d606415. 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/96a0343e-2bc0-4bce-98d5-76f7ce94116d.json and https://artists.proofprofile.net/proofs/artist/96a0343e-2bc0-4bce-98d5-76f7ce94116d.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 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 0x1a80ef09b53eeef3402a981d9d3c9d61af9bf5843c5cda0bc6fe7d905efb2d73. 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/ZBX5Y2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541fd25a3592cd041c9823cb32a1f822343cb0b9e55a6bcb899c7ac88de5c73. 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/ZBX5Y2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0767dd6fa8f4ac14cae00bdda1bf4090ae68d4e3e91443d2c02962582175e52d. 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/ZBX5Y2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db92bca6cefc9c4c28708cbb86a9bc97afc849bc35dbe9695d853ef82a038ef. 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/ZBX5Y2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997af37c326de586eafb8f9b5660506ae11c98119d494f17886e3f688f4b1d9c. 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/ZBX5Y2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712c387c3b098cdafff5efbba6ed944ad17edd2aac3a6bf68686568195c61035. 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/ZBX5Y2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa41479a4203adcb05d9fcaecf5ae1aa97667db82c25edb083ec36665e0c2df. 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/ZBX5Y2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c2292c5e502d5001771edab14996fe7c8fe730cebdb44633c35426d82257c. 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/ZBX5Y2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f4e56b011b824354871f555364ea473bc7d03dab11da34ad077a35f6089e70. 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/ZBX5Y2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064df2ef9b168e2a069c3a12cb838cf75a71bb01557adaba65648f3fcf422728. 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/ZBX5Y2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a853b45f7e77093a6863c71e86abddbc2fb590a155fcaa2c74eabc22139ff5. 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/QZFZ21938212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86384ddaa115ecea554e0ba0f32f2937fdbad61d524347e4b379439d744543f1. 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/QZFZ21938213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94b943991003e72c78fc7d67fb8edd4303d8c953a23cd9ffdea22bb58441a0d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ21938214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a56a00c1980185c5f81fcfce3b02c77c088c20292503b2cc6691919f9fdda1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZFZ21938215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6955516eda4041a65c93a5a0c779cb0ea244abaab86f45e212d5c332542f887f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ21938217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf335985c2faca22afb7d23793eeadb1be708cc3626d73fee40f158f825dc77. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZFZ21938218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b251a8c8041f3238599b93a648675897f0a945fd44d86cc12099d8a4ce0c4b. 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/QZFZ21938219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f2f69b1041b633421594c5d1a170c9818dc02b108ff9bda934693c99764a80. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZFZ21938220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7659058bed763f681c8b823c85322573e90e8860a784dad9d05d89c409d589. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ21938221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975d3102c95de02957dd1bceed2b82dc612d7f1f73296d02487fba5b979c67b7. 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/QZFZ21938222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58399f2fe43e25151384e6e0c707c5962d0ceb01f462bc0ff3d50189b7b3fb9c. 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/QZFZ21938223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f4e56b011b824354871f555364ea473bc7d03dab11da34ad077a35f6089e70. 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/ZBX5Y2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee4afb5e93ed3d79fc00d7222dcf15dd443ca7c24065a760bda983d8ab1e93b. 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/QZHN92351696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda66db88ec11f3611137e3e0c4fc2173903c8e9f30f994d4edd83d5c78ea98a. 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/QZNWV2274859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47215abf481fefe3eec8d4a0705cedb725a346b894160dce4418c6a880641f2. 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/QZNWT2151678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9ce1b1ae466fe3fa8b8d993d260633496739c367deaabca6af52bfeaf7b61f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZNWQ2104747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217541cfc89232a065bc37781762e24a842bb22d09eee0dce85d0d1c96dc5f55. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ21938216.