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 0x603dcada88ae4982a2204f41a7d7eb9fc537497ebe842b001d977ba772a2c083. 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/769e19de-5feb-4b1d-987e-ca78b38341b1.json and https://artists.proofprofile.net/proofs/artist/769e19de-5feb-4b1d-987e-ca78b38341b1.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 0xd6cb9eb6d421e31cf876baa6bca46e4fb1465f9f95abd06ee251f38c2b1b0674. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ATR981139396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a270a50dac947fee27aa01010961a6e5eaa3a29ed296970020478ee47ec9db. 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/ATR981139398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3005de72503374f9d800ecb48205840a95e3da3b661493f975ec702faf1e033d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/ATR981139400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b13141ecfaa5f1d558b4d06ee9d12901be346da0bb72358ce06563990557d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATR981139401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd5246eadfcef4b4e340f1374b8eb4ef7a91dbba241a1630d28ec1cee8c13b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ATR981139402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515a9d2c5011aedba13cefc6e979b1c3bce5712e612510c3a4bd029cdd430a4f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ATR981153926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5967ff14bbccf0224b13fcdddd5cb7b5e93464318a1dd3d92346d862b2452e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATR981165469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910c6af33af88197c963c00919ba940d2c65ff9e89b474763fdd24f44b36260. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATR981165470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb5410d25b9259b0d6f47afdbf7bce5aeae09e668a21888ceab707ff9f66a36. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ATR981165471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b91aba7278999f20479e896be0f2ec5bfe96bfaf175a561f7878dda40ef1b0. 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/ATR981165475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0c90ba15d158b6c8a2415e7e392fe31650f9ace66eb4ef8964cb3a2a81b605. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ATR981165477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2044fdad33c70f7d6c3e96fa294a5fbfb6ab059bdd7df5aec341c909fc2ece90. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATR981177607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbae86e3a07b0e8c9111754fa11838cd968ef2e5dccb201b8108dcc766c3b75. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZES52335978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd216892fbd1eb91e6f6965e990af7091de1433ce2cba3d9e0268aa53d1ca80e5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB22286021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0e875aeb76fbadab9259f77c23c006627ef8862a974b569aabc0304e83590e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWX2250952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4828448b83855ab6e3285c3980017d64911f0df735a34996400536868980ab5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFZ32355503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e33e46657527a814ea7ccb4b0bfb93646871c0db50a028cbf88d55cbe0a46. 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/QZES52335981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a576a5b19480c6876d17f7be9133bbf1ca31fbc2de5894bb5375aa131e79749. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFYX2348363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b91127279d84a8cc954ce7d791433dceb218d3daa362c8e2070cc4cd20a4e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52326861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034a75a1f14c0346709ae7166c03e8b10b61cb451ba90dd87757c3ee7b1ab0e. 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/QZTAS2211997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe4b4916e77eb56147dc524fbe48552d1444b2c151eb8830bc32441aa131a3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAS2435848.