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 0xe2db6b41e9806eeb8751a0bd7649033066e06b4c36958cc2f26a9efdbf004269. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cf1b7b8-4969-494f-be4d-e97066cc05ef.json and https://artists.proofprofile.net/proofs/artist/3cf1b7b8-4969-494f-be4d-e97066cc05ef.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 0xe7ac4e705ffaa16e3c1332919f0005bdd96127fe042cbfe3fa04d95cc07b28a4. 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/HKG732434243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1a91fdcde7869128914569afab9d2d282f8876cf3fd105ecf8927c9cf15bde. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732426997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce015fa7260b9998000fc5b6e5c41be153eb7bc080d2dd6cd56c994702505b9. 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/HKG732422087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca66c1c43cae1ac8836c93b840dcf41cb546f40f02b3df623c1a93e35da097b. 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/HKG732406979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7647a09d91c5739c8cde3e5d7807c0d722cb742d7f99cb1273910be0aad9de18. 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/HKG732406985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d0486613285e04b6cbe218a5afd38b43dd80ca6a4e002b17cb93830abdfa6a. 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/FRX282461121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500fd592d10eb398bfbe89fbe17e07de11f441e07b9b60d30a2849bd27f1b2a0. 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/ESA122431736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb4c89e453aab8fa088aad0ffedf39f700dd7ad83068aa5a18d773bd4eb7547. 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/FR10S2464602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d40e6e044e875cc490f51129d82e524e37ee306597ee32ef0accf0e71553845. 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/DGA0Q2384691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588b937a1ae15ea85a18089e9a3ffb18d36545c9272c687fda05036dddc26ce2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0Q2367720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a88c0ef8829640f847c8c339552370a1edf72dcc734f0904ab34e7b487643d. 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/QZZ972321662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebe628f08875375f8d1be84e3d2a6ff0a986cfb3b26ef9f89122d43f5b654b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0H2334831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686d9a60278bf924d39fad2472cfcdd0050a5efa128283e747759fa2b2eaca3e. 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/HKG731681477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809f73a615164fe6c178190ec711c188ecf88081621c5d8a1e72821c40c7c4d3. 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/KJFAS1545740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9f6458d19389c9d582108925bd8011c307657ec46e33d0d3865d26f401838b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0S2474363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511089e2c5831c38b00cb795500eb4ca04bf12aef263b0332ba49aca912446f6. 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/QZJPM2402016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0612318c049611ca9547ab67a90fa1767e6bfa6fd5cb52568ee5722eb2e6db02. 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/HKG732481758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37514f2d8c1f8b22903d4623f872a5ebd5918bf3cb6b2713431e6d586fe5822. 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/QZJPM2401972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0938ed47cf81f8e96bc45c3b8f0615784385af455508d1b166536f2c08c59c01. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732463748.