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 0x16a5c2b90e79c182af600d7d164b9e7e2ab8e8ff46c9cefa64d348f08963ea2d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6582b17d-4bdf-47ef-a267-b8a38df6f8ca.json and https://artists.proofprofile.net/proofs/artist/6582b17d-4bdf-47ef-a267-b8a38df6f8ca.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 0xb5cf7b221a321604047b55e8e7a39757a24a3bdd4ea2197a7efdf1f1abd56d93. 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/IDAA22200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e3725a34e74cc18b5eb0fced8c3e737bb22a128020fe80ffeba76d574750e1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/IDAA22100369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0498108fbb00ea52a60d8813a768a2a96277e79c57e70ab84f2f7fa899d29a83. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDAA22200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f85955f56764308ea1be790b53ac84465ebf51106f974f76208df1140db4e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IDAA22100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78300132746c0b2ee67d08d2c2544fdba06751fab39e8fc7be6374946657162e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:07:26Z), 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/IDAA22300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48cfb7ca121c81daed47f8ee695fb05a53e6b0c918b468b3e13e15219d93448. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IDAA22400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f06bf766dc7825c17ad94fa2e69ccccf060782cdcec966dff51cee7541de425. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/IDAA22400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef5a0342c37a6dc16b6f71292d4dcb3f01250c3aa2a5ca9298ac313ce5f746. 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/IDAA22400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af51017576a38ac6886bd83aef66cf2171bc5d87f13e63e9db3693eea0583a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IDAA22400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511f44c97849c0c3e8a558ac8df1effb3815bc53d42dc32f35934ada4c7d2a99. 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/IDAA22400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5097fcc8045742e8b2895292f541dd81a39e0e2bb6e19607d1c84676a4f089b. 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/IDAA22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f34fc62c840ce3077858254f8226ff248e0d5b2be23731c1c94ce7770c1aa8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDAA22500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3958782aee55cb5429ce17c8686c7cf3c65449d68cd7b03be4de644cd8cb0f9e. 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/IDAA22400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a5e8e7aa3d404c4e6228db71156f95af2f939cc938a4f257f611f57b680c7. 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/IDAA22500003.