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 0xaf122ecece9f234a29c70a5805c3c104643e46b6ae2ac26735758b87ff7b96bd. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aebdeb92-e61e-4e08-b764-c3210d5a3158.json and https://artists.proofprofile.net/proofs/artist/aebdeb92-e61e-4e08-b764-c3210d5a3158.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 0x9d0d31ba38b47eb032fedb267ae7dd7df279972b0cd6f41d253769ad597f560e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2576837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0295f78f95ea30eec2f6201b1bd03692633c11d29eb7d834af11da7ecc1f3afb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZK6N2576838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4153057ecbeafd21840eff55aa54b6e1097f73f8247115482b37ce8e4b94491. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6N2576839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8945b88bdaf47d84aaa4d54815cee3bf93def206f569e024f711a7e8dc06427a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2576840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573d0ed16534180b9e8cfad93addc2416524682bc49667ce79f501d1eea493d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6N2576841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7d6005731acfcc11492f95669e2ac83f7f55d04b786624fb7557d681edf165. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6N2576842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc68a79b6d33f17b2f1f2d0a2fed7c0b803306c890b01d29a11463c6af377412. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZK6N2576843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c17d0618749f5c430cf91131a550ff9077daf00be1d2dfc14221b47f5b7716. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2576844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b723b6236c3c195e6dd323bec619c927624eb53584869aa5e4e99b4c9af010. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6N2576845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6975bf0c9ade7f1910d19a5ba1430565f7e93bb51879f0ad269d7334b09a31. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6N2576846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f5324a034db250763fb5e391b7f414338c28f1e96ddc7dc5cc54979979732. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6N2576847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851392661ad6d5062541f520af4e6d9462c19dcee0849637928367039c732d99. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6N2576848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb703af053a6f7cd0cddf038210b753b1573e19b388d1df86f472951b91309939. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6N2576849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2c41924ad6fb83b96229b8336b3838eb0ae91ffe8f77da3f75858dc6adf9f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZK6N2576850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f2685a96c423e441e01d799ce33d0f7176b50af50480b47f5d7027cab1c8f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZK6N2576851.