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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56db5daf2c9c7c2697e8eedb6b8e858442ea34a2fb7309a4ac6e4a7ab87519d. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6c265df-ddbf-4563-8c89-df4d72f4d844.json and https://artists.proofprofile.net/proofs/artist/c6c265df-ddbf-4563-8c89-df4d72f4d844.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d354abd868cfd9a0c4162605136b98d0c0eac1ac83556a102f14213ed8c615. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJY2363304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68671d4aa80065cb564e19b3078e08098b3765f0e99e7812ea5bddce4a49a36b. 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/QZTVM2314532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82689eaca668565fcca193cbd3723b639f2813f9ab63854ebe11d14f362e9241. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZGLM2346702.
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 0x19cc7082f808c187d034d91b29fff89ae38d56b2cf4ef9a057a3d7bd929c9f84. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZTVM2314533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13a338c148ae1a2265eea08ef46f6fd0dea05fa958169a3f443b07e69b16c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XX2113520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9f241005fe3dab87e9d1b32f192dbbb8c6e381430b5eae95c406d9e564b2c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/SE6XX2113521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703de722ed281db87ec69fb2e98368fea15b8c3b573926f0e03d3ec804d958ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XX2113523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a3d14643a00c21b664dffa69c27304ac04b12ea58e7b21cb67fc96364e1f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XX2113526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c5d2e438e164a2d6d0d0922a6fcb75504b239dff19f764db2c18e04aacde0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:10:25Z), 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/SE6XX2113519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81cf5eebd2c6215515cc4340fde2f4cf14b31bed0a80b5266dd3efdf777b274. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SE6XX2113522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0fb7bb5eb995eb30b695ebd3b6c9c474e569ee9b3f5d989bb74984a7db3a20. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/SE6XX2113524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e28f3a9b40613ef3cce5957be12da4801f83a0c7077a028119ff89898507a67. 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/SE6XX2113525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6120b5429fa143df7e893040c9a32f6b2c60450dfb6cc675a0253b38d04fb7ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1875702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2645e174468e9c3b7308b2d54c0f583a3c6ce0a0a113c8e6abc9d5ba51ad513. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB1875708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a40321c45779ed93fb1b23350eaf1e9751d688caee5e70877b1c68b78b06fd. 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/QZ5AB1875710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394f54d82db4af0252245d07edce9447f46aa7211d57f7ca7fe4478e77685d5d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2357428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93052a094efcc1bfc515ce26d4a2c29ce15bf401406641348520c3002b34356a. 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/QZTVM2357429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a3e895c4b4c56d37b3cdf4e4a254b2876a82686eff4c44bc5811ce667937be. 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/QZTVM2357430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1202de30d41f9e78de0f6c5c58e07eb15385172f789d70e192914c3dc62bb36. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTVM2357427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bbef34aa98fa697af4dd4af5adcb82c8c1cc449c15155cc26e668babc8ea13. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNJX2383891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d392462a624ccd0ec3d171624f44e0947465a6ba03272f402d876d4aeb92ac. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZTPX2331262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe923b90986e3142042f30bd1bc7407105b237901d916ac9eaf845a8487735c9c. 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/QZTVM2357431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f17146ff673cfef07e8ddd166fe2625dcaf3b5c8e136ab63d8b9182a045d424. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZTVM2357432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12cc84ec129dfc7dba5c741f4d64b1cfe2530eefdc4cfc27a4262e3e055d58e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2394457.