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 0x7a1facc1663114c3704630aae6b069f21db30d238426608264b427cacc70e836. 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/35729cf8-0365-4e1f-a530-ce68589275c2.json and https://artists.proofprofile.net/proofs/artist/35729cf8-0365-4e1f-a530-ce68589275c2.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 0xba9465d76829a0ca0eb860dc4f93630641b9e1fe8f47473bd054857a293572ed. 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/QZS672427167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f2a77a47643871e3f4b38b7b9415a9b5c5e864c9d04811242410b8d2d63e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS652157544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68450b1d8bbd5740de5a8a9fa6a6478d2cc003e7294be6829d81797e299dc0ee. 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/QZS672157125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fc9a8259599bbd274094e4590fe101cd7bb9760f250349c50c1946056cecaa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS642132907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2d501892861a0673639f7278c3a6c61e1169608bdd9e4eec0498af9f0cb6a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS672135607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3843db28d57d3240f45c82cea095c551fdf234867e06de968333f29eef4bb79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS652182337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb731d9a7eb32f5d0ae1153744329bb6ed84ea2003f76d838d79b4082a3f402fc. 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/GBKPL2145044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ff474304351ead1cdc6f515ba5c541c23ee10df4abde991b60a14d51b9d5d9. 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/TCAEN1978924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ddcbc5596f260e805a9010126b58de72d2db2933f1a10e53d707663c36c32f. 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/GBKQU2513942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869cba2ea6f7acca65d892a426f83f96dab9dd70ecb35b3403168b94ef190386. 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/QM42K2209170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc62a50a586c651bd3c156d57865cc0f855004802e49ea29b96132694b67f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPEW2576685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6284efccf652b5c9326229a01dde44d630d766b8842ac1b1a3720b9d3c994ea6. 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/QM42K2554824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01a9aa7b2330ae721023ec52f7d109ffdffc1e5b900997b4481f5aaed3ce7b. 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/QT2VB2439360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1291f8f533cef2d147e15d40f431c55b4cdbc20b4626751d7ea49c22e3a5ff0. 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/QZS652477716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010257f1cee23f2e4f1048eabe6027f80ebec00a57d5b19d56a06c99bbc9cf52. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB32233125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d34fe9796894c11329bc164a1c02dbf5c82041ac386c656e3a995595b84646. 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/QZS642148781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5037f622505c48cc788f56a5a51eae6d3d817b65ae0e78f3bb0c065987307017. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHL2088341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a05d131da88f18cf2ad8e3c08985405386ee69faff66cb445c3bc59250e85f1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZKDK2110785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd60d1d5943914cc417ba83a8b2a72cad009c9c950eb0d5bfc1d8696bcfa5f84. 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/QZMHP2097410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b92d8594dc388ad0c3088988c566f4e7eaaf925fa02069d4b3ee3cf3d2b05. 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/TCAEW2014874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48620a5d3eb807848ab4b4c54007fedf3ab8dcc41f0439ef78f777c1233553. 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/QM42K2062189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdee59c2f5d242bc594f67823614c6e36a9c59bf58de97649359f87fd00aa1e0. 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/US3DF2008025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d34fe9796894c11329bc164a1c02dbf5c82041ac386c656e3a995595b84646. 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/QZS642148781.