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 0x6580d5c9b2d3f74ee214ee2cd6ff25b7eadbd95e1a13e5a572ee903d66a6e0fb. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f3a7a90-473b-43e0-9eb7-4fd3993b4843.json and https://artists.proofprofile.net/proofs/artist/3f3a7a90-473b-43e0-9eb7-4fd3993b4843.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 0xc3c304fd313d9b0e2e8be4468366e43861842d75acc3e64f14a655585859acfc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCJPU2332210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc17e2afa6e56c7032bb43af385f9cfa15449362a7b839abc928523466f5575. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCJPU2332212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18592ecd575d9e6532c1466b97b3ff318fa28585ff4be657074c7d1000bccc1f. 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/JPZ921313185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a168a75b42d51c0a41a95e8d43ea3f7a33e9f6b539b0322f55ad7e799da4773. 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/JPZ921313186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dfbf7f5e2d041ca2dbc081a2a9b6bde2443f915e6e530b63d1fa54c65a1ec9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPZ921313188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59007cf5a66c0d3ca33c5bee8ce20b3a37451c977e47555aac4a6c898e1a605b. 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/JPS800992108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b934d99fe59d541077149af1575e3dc2862be4957d4b67a2dbfa670a1713fc. 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/JPZ921303265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c489ac75a06cc14672eb927da1a87d6fd9b3c75e6dd804ce9c66a312ed8a4. 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/JPZ921303266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8a4df1af435b81fb5bd930feea280bad98133176c68eb15566f1d60f133669. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPZ921303267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145a2c35600f2eab332e6503b10080bc80618e54da3a93548051614292636c1b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPZ921303268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245c1ece240fe27a5575e198585d2706bbee3fc4531e22dfb18f27604037f46. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPZ921303269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af14fcbd53f54b36dd2f5c931c66695bf9733a7ac38bad3ff78e82de889669d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPZ921303270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c61ad5f5c79d3e85a70fb9fcf9de8abf878c000f4b3f20da361b2c7c79c86. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/JPZ921303271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fd80bd14e212a0a13930f14cd67521012046817a7cd603c2dce978e6f2b587. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPZ921303273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d72b0c1eaca847e864cb39ff167ddaef985c2783cc5fd0a643faa137ee305d. 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/JPZ921303275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd234927383da65ca779aed03a15606f0fec6bedeb298dade84f8e31c853888fb. 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/JPZ921303277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461799b4656eace3b7106d5ec1164192989bd8f1ed846f948d0ff9d9320c1e3b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921303278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a356ee1ad4d2e9402f3dae9c639f77789273c498da0c8f8af5d6775bca55d60. 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/JPZ921010773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5cc6eb289098185981e72057d312e592587c5a492b9413f06d4d51ae985843. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPZ921010774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376daa2049dbca9e3f26810d0cd8fef64d00709d4b2cb13296ef64fcda96713a. 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/JPZ921010775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b4905fa4939868f041077e74ff92eb8308d5eac97341f77136ea637f524ae. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPZ921010776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa739648dcbf16c12129d0dc3bf7b8e20625315d1b7e43e845d24409da75d9aad. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPZ921010777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a463c9d5ee6aaac1afb6491b888f4b8a24b2450282debf4316e0782c30ec96. 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/JPZ921010778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f450c9535ad4d99f45db0b006ac5b5310705ca11899ba683d75a635159cc12b. 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/JPZ921010779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d7c51ae0467cffb73dc369631ce6c35910e81117474a536de47d378fa2d5d. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/JPZ921010780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3004480e4fb810244d8c5c9f3e9f0e5a7462f0401b5018a8248f61128ff39966. 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/JPZ921010781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe4f12df01d9b75b664e204ee563643138b11deb49fd6c1721b84b22cba3071. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPZ921010783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b0df07394c4b6bf316eff67cc7558ab6bc401528dca584b1a5c99e3e704ecd. 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/JPZ921011306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f3ffdfa279f6ca46fe22775d4623452ccc0da004698657b81c7b159ef79d86. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPZ921011932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530dae0dc4f759efc95272317066663cc243209cb23093c04dcccf4e8a203cd0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPC2406875.