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 0xf359b3a3057b9bf46b3dd0c32584e7578a5f41ed6b9872d99c4d56aa7644533f. 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/4837a7dc-1042-457c-a889-6dcedcaa882e.json and https://artists.proofprofile.net/proofs/artist/4837a7dc-1042-457c-a889-6dcedcaa882e.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 0x43b22e4656bec4ed8a8f59dc886d5f44443eea2e99b75b40bcf500b3d779fd26. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CAHQJ2546208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3596cc7e599cd2cd8f355a572bdaf38c90d28adace43659d8be20989feec903. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAHQJ2550659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6728689afaa74070d8a1698beed678f39e946f1c487170654f4657dfa4751f50. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/CAHQJ2558872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e82d6e26e0c7acec3bb694abd7a87cab378da4670f8f781a0a6cab41a397ad4. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/CAHQJ2564366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f223e28ec34d659ff0d5ea812948b9166997b860c33bfa8584d581c80b39ce. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/CAHQJ2567243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1efa1d031f492dfbfb133954b9e8eeeb09654a374b0f983e8faf58dc1397d8f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAHQJ2578885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0f3ca12e06221ded00af9e9804b8ca95f3da8c318122576633ab199003c921. 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/CAHQJ2581594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e2c613b8b5e80c620279069c93aae68486ee1c8d6c70181377e51f3133cf19. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAHQJ2586656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665ad7037de60b27498f0d29fc087e7158c4f4e555c5093772ea6fcac27697ce. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CAHQJ2586682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ad6792d45693571a26f501acfb873bde9b0e37d2d741f7c27d728b5c279e1. 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/CAHQJ2588882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78efbfdf4c3d491ccbacfd7f878c0c75be61917f68ded85dd8011ac0ddf069f5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:00:45Z), 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/CAHQJ2592800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4c9c88426e9c283f5b585d2cb3612735246e42b203d87c9f8d9efc4e8fb9f9. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/CACWV2503326.