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 0x248bd1deca8bbd3452bc2a28f52ae47dedc2c85fcc7b5569205005ed9108aa6a. 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/e8f49ad0-ef3a-4a41-b899-07284157d37a.json and https://artists.proofprofile.net/proofs/artist/e8f49ad0-ef3a-4a41-b899-07284157d37a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x51eff906faff3aa201325d4b29f08c84b1c5ef80ddcb82629009b2b8316e93ed. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USQY51246607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ed004746694770e42f699210b9a9281a074990fd0115bd99e97d0be1406f5. 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/USQY51246608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1f2f15148c136dc567b103dac5c9c939ed2860815a10cae53c4b368645bb98. 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/USQY51246611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fc916d9bc10be8f64b0786308e22f5f9828fe5b710340e8ff1f25149397088. 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/USQY51246614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b80ed362f2619f9a76b37c3ee3127d7e6fabbd2d78e9f95740858fc1aa2ab. 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/USQY51246615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091cd97d17a6218159829ceca679543b59015753a1f8b420ae90232c6ea4e0a4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USQY51246616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff6d1323ff30f83a1dc0d81a1664a76a01bb2c572fe6e668683178e60a2e5c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USQY51246619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72279998598e5e0bc013ec1d489735f841cd78fdc67236c79abd8cbc87bd72dd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USQY51246620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be9f3da9050df9fd5344841b21ed49426564056282cc86badcabe9e6e06e4c9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USQY51246622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2b868a0db2f9a9b92f25d3b1bb6e08cac836ce1d8b7c2816652071a8b51050. 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/USQY51246623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00ceb3a0fe108c879236b825f31af814a2911f080b31cdf252cb5a63cf10870. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P1676604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88471fc466519e1862b09ea7ae95201fce466855813d1463caea163128d0521a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USA2P1676606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0530154d0c3437825b8162151982253c153f570cc6bbf6d4c83250708ff6f5ac. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P1676607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda618d085bb8cc436626df4de902b942bc11295f635de123318851feea77877. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P1676608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c9fe6022f3a083090d97d564c515bf891266dd416576a551f465fae5021d02. 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/USA2P1676610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acb5bf289f2e39e7e2e996e50fda02deea96f69f6cfd622efff965c929fd913. 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/USA2P1676612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6319e685279b23a7ace23f693f67436e0466638accbf0fbebc86302d4392b82. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USA2P1676616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc046054c069c9c218161dace68e6d7939576072211f310ebcaf599901950fdf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P1676618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9ff8b2e9363541c06c8c7b0da389a75b803cbd9adbc6abd620f46ebd5d6497. 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/USA2P1676622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ac4a7c8d5b6493294bb6355c3ae6afbc0d6a13e1d513057b480dee45abcb9. 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/USA2P1676630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce2146bd0247cdcedb0f2777e1b4fbf7b4c088e02b5840527c5f560e04962f. 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/USA2P1676638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5de1252fe08cc5b77491122a073a7cbcdbb8be061fa7c89d7d02b1b8da2b0. 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/USA2P1676639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0840b4d7bfaa3e9b7ef8445a8662dc77883883178f849c8ef340ef7f15b471a7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USA2P1676643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd881b3147c0b53c4900e339041d7dbb77229ffa243e3ef1069897a6a18ea08d1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USA2P1676653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8fe698469ca94bb4eb94893c2f6fdab42eef24b09dae0e679a0247257bff37. 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/USA2P1317150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30b0a53939f41963f36ed7ede869a771a5972ae791a3fbc880f8f1031184726. 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/USA2P1317148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9106531b418b08d3e3b31c4b3978ce922a58cfa642f89c3b2109d0e8f4fc5b4a. 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/USA2P1317155.