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 0x74a28122d6891ef9e2ddbe3240655645e5979e575c1c9439bddc54cc4ff232cc. 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/c223527b-0d5a-4bc0-9902-63548d7fb876.json and https://artists.proofprofile.net/proofs/artist/c223527b-0d5a-4bc0-9902-63548d7fb876.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 0x1fd88ab751936b34e3757bdd6045065fdbb5cf8a792adaad59a75ac849674826. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEH1950755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeca255d740a3618c9750d140e3d4f8283bc65677896c704364ecf2ba142d3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEH1950727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569a5b6c8629fc45b9dd5e98bbf1341c2715085f164244c18935342499f3056. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEH1950734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba495f1d4d3bc200e5376b51919d9e05f398512047da6a6241bec82ed74d145. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEH1950744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b82277a0299aeea2d40722b5bb394443c9c0aa72dc4b38d9593059914580f7. 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/TCAEE1962755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b8629afabf35072717fcff8bbf257484a27f7fff2cf67c30f59ea47d931fd8. 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/TCAEE1962760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a3d1c6999fc780df6a6a04f454024c5bd99adfadd047a6c653f8bcbf65c1b8. 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/TCAEE1962769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ef68f5e4ed399194e8c8d2f9c812e7e587d500d00feb098ce64edf3d25e9cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEE1962774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e5e6c44575d2b373ba73eda26dee512d53fa678f420a944f84def67d2b3203. 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/TCAEE1962777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4008593d363bf90f3074b8287152e61059b14e852453cccd14de262c522e88d8. 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/TCAEE1962782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0e18c0ee1c0d8fd3c95222191c0d7b88d99f6abfbe5970d41257daa96480cd. 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/TCAEE1962800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8c85e190b3aeb8e2395c98268972d2ae1b54b01b7d6ac2dcb57d4855e3b8bf. 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/TCAEE1962804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78830bc6ee6d92e5552d1e5bd4fd688f1a33c0e26e564ba41572fbace61634a0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEE1962809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0aa190799d9a1bc3aec45f98b80baa3d7a6f5301f72d659f410f5aad71596. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEE1962814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929762fa0c18c21ae7f80aebdc80f4741ec77d8f5fe7771b12d3143b757750d9. 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/TCAEE1962815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d33c27a103cd81b2242c4e8916c771286e83875c0a1a23457353fe3f3a1d8c. 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/TCAEE1962819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b17c808180271376739c8846fedf2d9f3eb986cdc8457d9c0764eef00d150. 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/TCAEE1962823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b82277a0299aeea2d40722b5bb394443c9c0aa72dc4b38d9593059914580f7. 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/TCAEE1962755.