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 0x27692b282069aa5c013412a8c8cc4a6d3f8c9afebecc5d5e8bc2e861f8c0f7b6. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae69c32c-57ba-4f67-974f-050553d20b8f.json and https://artists.proofprofile.net/proofs/artist/ae69c32c-57ba-4f67-974f-050553d20b8f.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 0x4e4e51f70da9e2c7361dc490dcd1e4e3691044297eaa9e6f130a20573daf407b. 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/QZTB62274206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b03d918af4adc6dd44d2c2a090641b1387984a78a154ea4fc23a9e9b2e78b1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZTB62274207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139744cde2aa064c41bfc1452b66e8f98c4ed1b10e13832ba31ed62b48b8239. 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/QZTAT2207683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa8f421d00f39b6c152492e5e817ffad99c49a1cd8827ad8e665ff1f2383203. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTB62274208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc062f3a590922d7dccc9427e9ac387735da8c7ff7cb72053d771b01abf2d7b34. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZWFH2387033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8d57b3581d94276ea962c8bcc2ca68a3de9081f9bc4b4b2f1afa6e9400396e. 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/QZTAZ2313443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80901fa46dfc826940a367bd7c025b8d0a02f3eec94ac4e3e9b3b886cb318f3. 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/QZTAS2347907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b2d3095129e384ee9326890cea9c2e4ae5b911f8189c9b79c3b40b64651ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWY2341749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59f1aae2391fb70fc0507ce9ebb1e181e99b9243030f9136afd675041562708. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEN2390739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd1775bf2b91dc643a15fe13e2938a3bd6074ddae430c3bf57410c9b44e3431. 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/QZHNB2376842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a97abce5d3708abc23790b369de503380a5b99611b33dfbab24a568cee1d2b. 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/QZES52326271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139744cde2aa064c41bfc1452b66e8f98c4ed1b10e13832ba31ed62b48b8239. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTAT2207683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc210ecb1b7f98f328282a2c725babbf330aec0af2ea12f54953f0b4614eb5f. 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/QZMER2273127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448f4d5cc5d2b077d5fb8ba5e332034d94b11cfc703908b5eceee524e3a82711. 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/QZES52236114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3076894e1a7b848ec305f72731a2938485d5605c21f8cf625d30e1ee53877457. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZDA52429585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f65fcb0a36e5a4e76d1d74225299cc35305ea11e42523a018fe3a26edcd0690. 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/QZDA52429586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff5beee06f0c028a1514ebabbb1d63f60bd4127f8810d2461775ded5251978c. 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/QZDA62438663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11e705c1d35ca754c305f76075e6c6cd98a6cca01016480a34e180a5ce3f03e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZFZ62430964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa007f4844144fbf397d59b96d929090d5e82d8c66dc26830f899da36b6cf18f5. 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/QZMEP2473179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6920818b6442855aa8491af094e39b927d7c4eb4cebbe823a691ee1d230d32. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2450018.