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 0x32e7770bff0e3e7a5fc4801d0708733c48a9b578c854cbd215a8bb8f91eb04f7. 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/d386ac59-59da-417a-ac1e-22338f3d747b.json and https://artists.proofprofile.net/proofs/artist/d386ac59-59da-417a-ac1e-22338f3d747b.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 0xda8f463721ca6a26ba65d55823ca8d737d0e78975708d28ec755768ca5b6d98b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TR8411000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933e2d68871d5c5c8b860c900c0045727fa92dad0007f18fbf24caa87702af00. 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/TR8411000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958846a74dff97b7ff83415519a8f7d5173cf9f0daa2045cda3f3521b82dd8ce. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:20:59Z), 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/TR8411000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bcac008974baf4c6bbba37d9af6e3abd5258b57545d21a5728ff21b6322184. 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/TR8411000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7e74cf923d9606e64985da6e10304e9237a0d41420a015dc49ab0a8de25000. 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/TR8411000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15beebe708c1c2736578fd6e87b2685897f006511593e9900ccb6701f1fe8c6. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TR8411000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ea854d7304632a79d716c85d9f1e4a0fc55d7bd39e5e475ae968ae80b92aa3. 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/TR9489200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b569569d74eb357061fbca374c414070dea87d5aa644926b92e3bb3427fb4b. 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/TR9489200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d103421b5b473590ed56259169b9edc0d7a7e15a8cd43c23d542e476839cfe8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TR9489200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f25b73fedc682bd7fd2ad9180857500fe2ec2e5f90e732c788d1628cfc51e0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR9489200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa98ac07015089a509c2ba805d7c5ff26018edd5b5d8fe3014edc28369d979a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TR9489500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab99374d78f7ec83ca958e480fc02c4ff9637c21e3277f48e649fdfdf29c3cd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:38:03Z), 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/TR9489500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1908d1bca0ea3ebb19733855da55d0aef3f9e5e8f63fefe335c1d7e1d314fd2f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TR9489500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4453155192c5912d154c8b516b8dfa62a79a0dca786c676f0269e59225b38e. 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/TR9489500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3126b75fb93ff4c04d153bb98920c5542d0bf7bded9fd80f98dfe8e13a98078e. 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/TR9489500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158988c601b06bc8bc97c1cedd19b2f4f7446c20f95a3d3cd966774023b746b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TR0411404090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d37186c13eed9264449322eced6f974dad5fcfd79fafc13a8b3ccb71d75e97. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:06:59Z), 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/TR0411404055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4470499ad94d4bc68d83d83f52811bf01936165e54f63493e162a7b71b393002. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TR0411404061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6f99f9a4981891db17a8af53f3d410c1181c16a4150d43d10df87d6bceaf2. 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/TR0411404073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e71996df57a1eeadce69c10da31725da6df46df53b91c74b7fc0e5e4b8108. 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/TR0411404075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0fc28048650776e14635a2e440690fe988e71527deb5a6ff249de8700081b. 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/TR0411404064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aae724999d63725d552d921a0413b82988415a1dee7e6d9839c006c4433de3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR0411404066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69910604aba9e9e239fafc4dbbc33ad9c08a7be56fe0a0335fb8df1205c31033. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR0411404067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba06c055330c000b462f67070b686e2ca5dbb82e6559d4eb79f74b85acf64a2b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TR0411404072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031ea681d8c01579a738cec82952f39a4f9b5537c160da572b6ec284d6c4f064. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:04:39Z), 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/FR96X2284912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a357e2f4c0f183462962989078a644344044fc2b6f1e9d12a91e2642534d5c0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR96X2284914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d8834635cdc5d9b9cc3e3a034b2c7e6dc6fb64168bef21f67d5a4bd25274a5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR96X2284917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb10c672e0e7bad742fd509d36cf32b14fffd92cedfbf53aa56250f42908a1e4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X2284918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031ea681d8c01579a738cec82952f39a4f9b5537c160da572b6ec284d6c4f064. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR96X2284912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb10c672e0e7bad742fd509d36cf32b14fffd92cedfbf53aa56250f42908a1e4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR96X2284918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b732506e37946366a7134dbf95b891a1c3f65631fa8c9ef460eab5e01039dca. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR59R2453981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b732506e37946366a7134dbf95b891a1c3f65631fa8c9ef460eab5e01039dca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:15Z), 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/FR59R2453981.