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 0x8b2f25d62b277db4ecbfa1523cb85f57889338adf08c311682b7498c3c896eb0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d7030e0-80cc-4984-b66f-8e0423567672.json and https://artists.proofprofile.net/proofs/artist/9d7030e0-80cc-4984-b66f-8e0423567672.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 0x64b2bf1b10aaed00f0b71f2d744b1cb5839411b8eaee369d5b28c3a05a800e56. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USDY41687430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9948e12cdcb0a2f13c88687307e5877daf2153490c2fa4ae7ede0b0b099a53. 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/USDY41687433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d8710ba3600b753b1bd0a6f4f99b95b4ad7696ead2b701c72daaf5585af27. 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/GBKPL1817070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ff0344612ca2a95435e83199c75358b7d6bc7b03dc37cd5db1759f99130b7. 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/GBKPL1817071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c5400c33ea2ff084ce3da9ce9198e80af5269e4d479d4607ff3098d537fadc. 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/GBKPL1817077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669c49e43ca8c7d430a63ccc272b002ec8d3c0cced1c81bd8013a0a823dc3574. 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/GBKPL1817078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251a0f05316aaebe6daf1040f6171ddb0af32b1ba9fd64da24c3ffebcfc5f4d8. 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/GBKPL1817079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8037d302dd4946bbb2a6854e27307e1452c89d87ce7d05b121e9ec146f35b32. 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/GBKPL1817080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf6110c39f42bd1ef46d20b3e9d6fc310534d32fda8d9a95781438d141f167. 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/GBKPL1817081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc366772b1f09b1343da66e580cac6928403c3b7f7197fd35aca60e63ae6b67. 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/GBKPL1817076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a52278dccd504f004faa7b852c99abd203a6d5990a376b8cd9310d1e34129. 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/GBKPL1817073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b3e5cb034393c006f551927263b4d41a47a239dd32675c731b240a2bdcbf83. 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/GBKPL1817074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3409d614be02e0abed6f921f7f8f3f9b5bff858ca371d6c9bc77b064a4f77b2. 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/GBKPL1817075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26b809a84ea4dc6bf603aeaabe43d11f4aceab11676a68e40a8ecaf504ea727. 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/GBKPL1817072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6a02f18b217b5c8e604534b276581e631e73489351d4bb4157491ccbe3019a. 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/GBKPL1967134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bfe252e3ed07db3eac1adf8152263d69c89c9f306eb629c7905c45880646a6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBKPL1967137.