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 0x7b88daee42b99d9de801f6226c3c0eda7a61f4787102a4b99b8f0795fb2d5a51. 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/70bd8f55-4ed5-40e8-8b95-9b987849c1f8.json and https://artists.proofprofile.net/proofs/artist/70bd8f55-4ed5-40e8-8b95-9b987849c1f8.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 0x3d912e9fb52a7d2b39b29a91ce92113588cb7c6f5ad3ce9cae1c64bafdbe105f. 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/QZTB52329906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa3b1e01a871eb744024c198441881a4d5d4ae251ee45db95d2a4828503d7b. 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/QZTB52329907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318f27afdd3cf41bc6faef5f0c12f6e16a3bbb70801107d084eb577f0adc52ac. 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/QZTB52329908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fdc54c95d5783d79c9e28c4b7f8ec54e82fe62dd3a7208eca377c1fa2e8516. 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/QZTB52329909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c621d99d14c513f7724fed0ab523e4f0b42ab8ee66d0c85c1969aaaee436d45. 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/QZTB52329910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb020c833813e8736229b48d78fec755bae7b4611cb4cde5ade4628985030589c. 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/QZTB52329911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5aaa21087ec4c0d54ae220e9c347c099e7a7e885e553e7ed1229e4db32ba3e. 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/QZTB52329913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bbf6f5a7bb8b8d3dcab91cbac9dc5d872303b9588c0d11f374344cb19fb7ff. 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/QZTB52329914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181835c3d8e5a57960f0904c671fc0e6209953c91efe353b32e621fa9f14d7e1. 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/QZTB52329915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f78ef2dd195d323c2ff44f2696471837546a79f34eeb793d18e82aac2b623a. 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/QZTB52329916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12bfefcb0902f7c23da3f5f23cb05fd87c9aa27103e6e4e1a7cd7ca46139581. 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/QZTB52329917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa079752e7a25b03b8935ff3e538785dd8ae4c9f3962ff045b78aab9b92e98b7. 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/QZTB52329918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416797ee3b9bae27f07f6f98b566b7f84cb34be0195e84139e13f43e6ee2486. 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/USUYG1274345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88236fe2a0834920a562eb8eb1de983794f419bef822809398ed4cbcccaaaf9. 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/QZNWU2450760.