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 0x739ff42b724b78044ed7a4fe1b07631712fb0d37387746a9ce957242f98340ee. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bf10a89-ef4c-4e0a-bf79-0e206d4fc282.json and https://artists.proofprofile.net/proofs/artist/8bf10a89-ef4c-4e0a-bf79-0e206d4fc282.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 0x0cf062d7f6063cd098d49a9d62a362b3a5b96a367dc6de7645c79afbbf909d90. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEKU71842601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bf3fb5bf7f21743a606263f78360e1ad8241092ff2a883d1a5d8793c89f724. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBE82256432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc66f225d558c2f7326f2575fb77bc8f4a2f8b36b9af9c59cd8e7352594b3c14. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEKU71945208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8476bafcc0810e45932df4264a08250394f145504cf5640654bf53b593a83b4a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEKU71945225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8709f385875d8e5a8c0ebcd0f216f3d6abf4e6f5734dc76c30d115b19346a2f3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEKU71843814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066d0e06b6145a09a49aa2105218d13cf4b6c61003f46b88c2735ab7b2eb1e36. 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/DEKU70104123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3324aede412a6ac97837efd100ed7645bb671bfc4f21b4a8ec6389fb181b871e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEKU70205204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a78dbaec4a703ad97518064246e40c4df282d5535368feff91ab2ae209fbeab. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEKU70205205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230ae4b97995306d9b5249f61233a677f112a9cafb4178c38fb59de77eac6d7. 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/DEKU70205210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e798e2d72cb4d5ccaba0c074097165767b560be574abc18746ad9d3e151832. 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/DEKU70205217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1916e8a0b176cd7aeff1fb7038163381c3f95fff2d6a4bc16f4aea46f7fdae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEKU70205219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8ddb4ff14c579708a3f730e8bf9486f8b6ea915913bbb26adb7df1823804da. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEKU71637617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79940f67b49955fe90cd4bd0b66ce71e5191f8c840e5ddc4ca8bebf4d53d5cfe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEKU71637629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce8b9f5bb7bc80ecbcf724075c2ef3b05356b702456a08e33b4e22254197329. 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/DEKU70814409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d10441652ff84ee55499935b8b40816e4da6511a5be95ff98a177ee1ffb2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKD60810660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c7fa8969c9dd4fdedbee15de2caf05656e4e764032c46e2224dcaadf762cd4. 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/DEKD60810940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a17bea1ee779bca18b21529fb1624cd142b60d8d1df41eaa9033d18b2cd3093. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEKU70104507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc32211d91d8c33a40a00173d94b54ff3decd6bb2bb41578090ccb74bed9a440. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEKU70104509.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9e92218af7b39ab9fb8de91d9bd4cfc7585072d5fe218ff95d41f93a365b2. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEKU71121207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa651976b53000bff1a3b1c2647c222bab48c8c81c0218bdff33b544013fd676. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEKU70205614.