REDIRECT Children's Online Privacy Protection Act
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 0x68994e20c1d3b5bcc9ad2d952f1e2308080cd844816a81c14f9df6fbfb511e4f. 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/b4a9cafa-06ef-4883-bafd-d19ca71f6d38.json and https://artists.proofprofile.net/proofs/artist/b4a9cafa-06ef-4883-bafd-d19ca71f6d38.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 0x252f9e27eb6f9fe769e5b0261f4760f372b42688acc501be43e485ec1d57c803. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GB8KE1651256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fc5f19bb5b4b253247ddde57ba647cf53f10cf8f77b910928df951fa339a54. 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/NLCK42225295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d939052ac91d202e548d4f539b2eed751fe2355defde14d44ec3d2ae399e78c. 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/NLCK41058636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37c53c123c0aea661090ac98b265902936a8e2dcd83ff4128c1c099040f9ddd. 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/NLCK41093520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1578c41022c97ae35f063b3e0f1fce594526fedd74cef572dfdfffb33ee84b2f. 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/GBQSE2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73932d604823609ecaf7a2581ed800fbce13c09e5dca46e8ebf612129d52355e. 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/GBQSE1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f11fce0db238efb0376e9aaec2521da907e39224a33dcdae6bba468e9dcbfc. 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/GB8KE2150220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe9727b5b8c429f224b59de011600a8c6318536b584947715d3fe81fb5b4d4c. 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/GBQSE1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f97fe646fa481b56c73f7b64d733288aefbcf2f81fc0d2b431e5d6afdac22cb. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLCK41044812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79d05ac011df1c15e49d6d112717cd77ac2ab87fa63606c9abf7f14c668a071. 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/NLCK41055797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a8ceb3b29047e72eae21460ad68b8705af2113a2b9b0883e8b77e603c7675. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBQSE1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7735f25241efda4096d294653d9049cce20c915efc9c1d233f564a74d9d0191e. 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/GBQSE1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9859194a80a19532eeb4dcca5850b81ceae7b5750f3ca395098e4e83129d4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBQSE1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef471ff2318a52a2387ef179b68b8f6e121d38c17d0cc5e1e0b4eea3344eca. 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/UKW3Z2101645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73932d604823609ecaf7a2581ed800fbce13c09e5dca46e8ebf612129d52355e. 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/GBQSE1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef23bfa9900a6996e2c814b3fa2c134b9e82ae2fc2cd39aedfabb445e18ac85. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLCK42225625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3cd7a425d62a491af40eb5e8bc50d6bfd122512ba57185710898a978b6aa8a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLCK41082069.