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 0x2b57a5c14e271193c86ec342548cf7df324dd3a9a6e69aa900224a364c56164f. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be1ab0e8-57d8-4940-8f33-b5931201e242.json and https://artists.proofprofile.net/proofs/artist/be1ab0e8-57d8-4940-8f33-b5931201e242.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 0x857de3bcfab924c922d371b91bc75997cae3de2b9f4c86452242171cca22858f. 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/NLB932301201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea18b3b58a3fd841ca01dec798b88b79f728f4731b0ac75e0645fa14363fa2a5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLB932301202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073373c083aefae98415d1e1833ef37dd38d15206bad554066b1e6a35016cd82. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/NLB932301203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5eb4e8c109f82049d1d0c7bdd2f7dcf42c4ecc9d0789c54867821fb665dda2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLB932301204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e69ed9e73a3b2ba8690283fd455a33e869ae71edb98af3bafb4dac475b7c92. 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/NLB932301205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7ca15ae670ab66c1f487ff2f8de962118f3aa428c08c3ca312631d22031688. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:40Z), 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/NLB932301206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56cc3c9db74b45fe7eab4b9f251c5162851341c90303d63d32e3fffa713588a. 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/NLB932301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd6159e536982c0ec4720922eeb6cb02c9daf8ea621b02bd09c1768a9e8324. 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/NLB932301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0392ca4a44ad4a81da69ec36f00c4b8c2d41eb7c036f67d69f98455f682fbfa1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLB932301210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd268bac47687ec3c8dbf3fbec70e688292b3ac9579a52d51801ec7d9fd0d158e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLB932301213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd601577c77e767847b0e12a6ddafdc6539b3dda968d244c769bdba9af4dbba. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLB932301214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f19411d206079a74daf431d5ea3ab9ff7e6bd901f8d055f3344ace77b481cf5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLB932301215.