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 0xaf47f3b4a802d0f21a7f68fec2904fb3029c0db0dffb9087e7da810b45e457ca. 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/96f6f65e-764a-4ee4-8205-44aae3dab75b.json and https://artists.proofprofile.net/proofs/artist/96f6f65e-764a-4ee4-8205-44aae3dab75b.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 0x572dbb77e9f4c7ebb64923b337d3bcbd5c9d4969ab30f72312580e7b545a5c2c. 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/PLM402140001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73743fc36a645fb4cb18fe5c4e5af0cfe1accc5600b6d30202abf897fbb1de3. 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/PLM402140002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde857af6c973fb6f529123939a1f7974c3e3bf744cbba3fb1054d90033828fd7. 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/PLM402140003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2d5ac159754683749f340d76fdd7d36a2b7da287771128cc5b67177d79ed05. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLM402140006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3f10f1936e0c619914c1c6f85caad11b4bfcd87ff9e44f6aac16631efab76. 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/PLM402140005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c1b06c5e56e9be7653c8a6db04cee30bd3395ca7b8eb8ac22e5017728281db. 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/PLM402140007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572dbb77e9f4c7ebb64923b337d3bcbd5c9d4969ab30f72312580e7b545a5c2c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLM402140001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3f10f1936e0c619914c1c6f85caad11b4bfcd87ff9e44f6aac16631efab76. 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/PLM402140005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70306fb61bb26f511706feb35195b705136cab4c3aa61088a7d01b0ad2600e. 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/PLM402140004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c1b06c5e56e9be7653c8a6db04cee30bd3395ca7b8eb8ac22e5017728281db. 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/PLM402140007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5cb033c1247b9e28559b88916749fd33949d3554846ac96847a5c4eab35747. 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/PLM402140008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73743fc36a645fb4cb18fe5c4e5af0cfe1accc5600b6d30202abf897fbb1de3. 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/PLM402140002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0448976776ed3e112e48182147b4c4541c716e018f45e151719352db52b256d. 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/PLM402140009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0451eefd2cba606802020ae921e0a88b8c2707d1ea9e24e6fd97dfbcb8e8f4. 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/PLM402140010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2d5ac159754683749f340d76fdd7d36a2b7da287771128cc5b67177d79ed05. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLM402140006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4db91203d4fd07a7be8f3d074370da57ef6faf4c5c0814ac08825e4684efff. 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/PLM402140011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bafbaa0ac82ca14dfc570c08d40d9f39317cb2ced606aea049f81d7bef154cc. 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/PLM402140012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b80fa7a52bfaec585120de7b8c9985f8d11e1af63023abbd92fa43f71f522d5. 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/PLM402140013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9259e729f3cc1c03c739c266ccb77dd5ead59916c4b6df77730858edbaddce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLM402140014.