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 0x4ed0f44f447fe56ceb99ebbba77dbc0fe38e1364a0c44fae8674725e9d3eb4a7. 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/3bfaf830-078a-47e2-84a7-6c3ed885d701.json and https://artists.proofprofile.net/proofs/artist/3bfaf830-078a-47e2-84a7-6c3ed885d701.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 0x2cfef60de31269a5cdf551bd2289572dfec5cfb53ba53ac295da1ac058a15be3. 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/BCFUT2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f492bb86ccbf5a8edf41260bb203e2c5c30b700365a36f2055510a49b306a69. 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/BR5TG2101861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6edeceb024f6b9d98adf119bdf4a43db8930a55694f22c487104f65ad7eb6f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR5TG2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758eef3d80db97e4f4ed284387bea11462098221fed9eb90e46f968748d1dc5. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/BR5TG2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe64de3bf9f29e1c8eb698c289f0dcd291e098edc642170bc30a73a3d87da94. 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/BR5TG2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e8b01a9ddc5d708b4f0e81e008464202b08c1ab4f72ec653a3311a219e8dc2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX5UA2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda060c2add3a581dbbf8ab5bd84e5d16d0ceeef6975994f93ca9f127582f5ef. 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/BX5UA2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c784fd4368c57b2f3b94b5181cb6027e2e628cb0493d096b3dd2eac5395b45. 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/BR5TG2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26764fe51092ab3817eb828a7a395d7c5a500decf781fe0b4e28b3dfecb61bb. 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/QZW9K2419929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f542dd63bbd19c752191ee6847fe5701aa697d5b904a649443ba652de807655. 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/BR5TG2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f4084204c82c15477ab0f33a5535dcc072e88a5f51f6d8c71ca4c8d7c7b773. 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/BR5TG2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c093931dbbe57520983ce71208a6d241673df908ae28ca8c277efcf30d8a1bc. 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/BR5TG2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c1ada82b73c9e164d85e0fb30d6f08f532433c6592da1e94bfa3600184ee6f. 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/BR5TG2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326864e022b9a12e5feff726440b6cf7bfaefbe686ffbb97ba0aa62f127af770. 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/BR5TG2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3faf84c7be298862e41bd89a324000c65d7ad9f87b9d9661a6d5c78a11c4e. 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/BR5TG2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556220036fb58595b4c6345e1aee7566c0ed853698c8cfdffda76679d9379e7. 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/BR5TG2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eca1173f4e7d3b5747fb1341c99df6916dad0532445be4cdc478fd3c7c4bf8. 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/BR5TG2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673039ca7832c882a609b405724929996fb000c8f77f7d4d565b46fe104012a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR5TG2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6ef636252f8cb22c73d23d2c1f6dd7b965a09ffd073b9f89bfd5f8b976633. 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/BR5TG2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8321cd3b9ad12423db223f84287c766f568efc614aa7f9380b2761c700a4a613. 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/BR5TG2400035.