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 0xb66ac523fdf60a31f708699b7dfa6d5b1674704514cbc7ccd2febffbd2c77fb0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6090962-7390-4def-a7ee-7c36674749ec.json and https://artists.proofprofile.net/proofs/artist/a6090962-7390-4def-a7ee-7c36674749ec.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 0xecf42bf99994963ec8902e4f4ed8925f24ec484bc225341af63121f827e57e56. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:43Z), 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/GX3Q92183349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93ecabad0799b07f603051de68fc11c881edf2b6652505cab517787fbfc0673. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GX4Y82400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719168121430d65aafce9438c44c3bf68c1eddc8d02842399d81b0604a9b6803. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWDE2432730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d756061b1d73006a1194665a3baa90e069be82e43573d72d7bfc6eb1941319c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:34Z), 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/GX53U2379295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd4f8254b5accd0a3c39ff208542a141026ba0bd4f5ffe082cb8e6bb3ca02d6. 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/GBMA22518340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dac4a65c7f2cd2ff4098d1a5f2212c032f4093c4069c93025fbb4b57049fa9c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/CAQOI2513598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316a54540ed4574c0847d69164cc2623be5a08889582614816b6979eed630e7c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1803539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438051a6fba4a7464324b93408c18e625a53e305c049efe0bc6d7d6b98cc2499. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB7YL2100031.