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 0xe2149885cda08be7666461ff09cec8b380d3ab1b8f0ca0a39d86e1b4710ba1d0. 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/2d5d9887-74cb-4b24-9114-37555b45106f.json and https://artists.proofprofile.net/proofs/artist/2d5d9887-74cb-4b24-9114-37555b45106f.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 0xba41d72df24e84e05d7b910b0cd3bc989477eb838c4cf8dd14eb2d54c8bc9029. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAER2029011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12db4c72dd2a555c208a68d8803c92333ce4ad0c6953099d68fa134b082752b. 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/QZFZ52020326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235faa05fa29c487c077f6f62646ddfee43d301f9c006b5f5241e8b98e2cc6b1. 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/QZES92005239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1b53a38e6299baf943fa4a9bb120057a57219c8bf6cbe76edfdfc3e979af86. 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/QZNWS2029456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511ebb753e1054c3350dcd2666d6ae60fb8878b1b106f7549c90c98752c2b254. 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/QZDA42113493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87de49453112b3fd1ceba71d7bea838f7c8daad443c477a8ce76496f6f4083. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN82167317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba324f0da2042aa6c934f516192ebe8e7662a1bc37deb54debbb4ebea87755a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2B2202801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e0fdafbd5ea433f9a8fd1c9ba6b4ff540887b7e012a89915fe3f894972afcf. 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/USA2B2201774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80d84625dfd5ee3a46789e3601f68c87eeb9614d807e1cb4d80220c41dd4f70. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAN112300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c8d56b97fa3ee585e2a9b4374d0748be8b3425f4a6429cca78815d3f6f679b. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/CAN112301244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b325b90902303407d90e2d1d960f230b90b77ee1749f06c690a29875e3fd6b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAN112301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f0bd65e512725d9a78598e53cf15a694a7144cba2be1c1269b769309de5ad5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAN112301814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b66f092da566bce473517fed77cf8d8b1dc6bf6e4fcef27058aeb823ce324. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/CAN112400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d126e12fe2383300b3fc0a1f1221466e303ef0169ea4cd9b56cf6f6dac00247. 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/CAN112400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb8fd4d33b1ef0d2d70b8da74708fb7a6f0f9cf1b5fa096cbfb3d8697f1ba5a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/CAN112400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b66f092da566bce473517fed77cf8d8b1dc6bf6e4fcef27058aeb823ce324. 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/CAN112400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c9b982a9336d29ce088014c73506f04969b9011327eded9e1f6f5f88641c2b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CAN112400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4057e5bf0c65c5eb94f9e4c69dd359b5ee09287ab5915a5afcb81aea614577. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CAN112400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c10f15e5b13546e8155e681fc65b45f835c6c659393780dea036fdabde731ef. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAN112400733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa791628cda346dfead879d5877fe442bd43eb7de2f41435189f70ad47b114. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CAN112401955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa791628cda346dfead879d5877fe442bd43eb7de2f41435189f70ad47b114. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CAN112401955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131d38c22c0ba44ab21b1131003d7a25e57726774df0ae6b2ba74170337c26f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM99V2410901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21470688be5facccac35515fc673b3e40debb66c6b56865db9bba1c145633492. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CAN112400432.