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 0xf92bfa2dd6bfe1af65727fd15201642d3b3700495fcbbd848055742daccf4b2e. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e81c06a5-2de0-4484-9f0a-f9124d731c19.json and https://artists.proofprofile.net/proofs/artist/e81c06a5-2de0-4484-9f0a-f9124d731c19.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 0x16a07056edb8ce6d61db72c0997d3566bbc47c752255a53f5f9240038adeac90. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNJY2532177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7739dfc7ef905853141431acd890b7994b4ae3446308f910f037d98ad1c88f0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMDA72591986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bd8133d1777cbac6fa397f1e5c5b50d78e3bc73263c82038d71cc6224125d3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMDA72594459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ee045320ed68dad835772b45a9bffe4b59e843e8187035c6095fffb3eac48. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMDA72594485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc074e61a2b5e4a95f52dce11b4c9c498450e4e50fe83cb18d2d3609be955145f. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZZ7R2502297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ced40c1c3ea3c4144f8c84b4b7aca68b808d983acc08ef6eaf68b0b0645f38. 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/QZZ7R2505097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfb83b4772e791bb15353c6c67bb6832cd9a9a77244a1a3bc34ed13d59e5200. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7R2505084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9a38558e0db72cc54600cf35423dd04d54deba0a857fde99a67f7c000a0e37. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/GXHG92582126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551f062047a60abb1629b8b6f7f002e16431c4945a57c7326dfeb287a65eeff3. 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/QMFME2547451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5efd94eeb5980544799ff2f0b27860a2d1007697a7b946a6f191969b4d2b95. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/GXHND2504433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83056360d65c202ede360b8693652bdade2012e5a7b0c06c2836d38b55b47b9f. 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/GXHND2504517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc31fab40b12ac0422a22f0249a189d99b3c0863fc03b5f2c0e42e77ce13f51. 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/GXHND2504630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7ebd5c5276c6f9d705e5961f3e659108ebb8f953ec311dc521c797f4948db7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QMFME2563214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739898b0ec3dc4d0155744ad2b7c7630fbcef9897bb7866044763b544669311b. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QMFME2573012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd1f72a16a6cb539deab82cdf9bf1624058679a6a04b631842784b30d3ac67a. 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/QT3EX2578804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e69738ffb17bb6144b7ac6c2d09756b9133f3af964f4a6b68e68d6342f36de. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMFME2577686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9f29d383e115c15e347bedd889b5dd5956d2d08e42f4748e2dfbfcb714384a. 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/QMFME2585899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca71d5187c111abde15d906cc55b4fbba4252d74c8af6c9bfbfd3d0c6649a2ee. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFME2585915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fd85a0f449ab6ac9cd5f21500836647f071aff19ad85fa3ea34dee53e8cef0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMFMF2500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd47123cd0df6f30e45e5520da872cc6a7b255828ab21e32744c1101b59175. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMFMF2500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01012b945af27eb2a48ac1f8069e6e503763a569e3ead1b6e79d008b62aa10cd. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTPX2557509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee194a99d6318de9e5097036522e6f6eff519b7cce9dafa031b9ed2af5a5d0d5. 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/QZTVM2520276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11499dd909e1a792725b853441b76e55311806985d15bb86adb0a7d014324c3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QT3FG2569133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769a067926fc4401709987dbc419ff5687e2e54b14f1a491888d08f2ae9c300. 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/QT6ED2573324.