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 0x53523a382d5a8a381ba14321801329dccf994cb275d59496d95487705fd5b25b. 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/51512434-a1ff-4f40-9c4b-51ea38e14df1.json and https://artists.proofprofile.net/proofs/artist/51512434-a1ff-4f40-9c4b-51ea38e14df1.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 0xdb82f4b4d247cfdf55bd718ff35fb0886eaf934aee9ee28f7d49cc0486686348. 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/UST8K1792949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b5d7ad53a5f8087598a5f1f4fe0cb9a7fc6b66230ec8bc7b4984996673578. 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/UST8K1792958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487da70e2e0b332dd0bf44555163b0a8e25a1941740ddbd3273026d6128936a. 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/UST8K1792962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d74625752b7fea2935857391864019915bceb08cc1704ae48c2a711e90ac7. 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/UST8K1792963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae24e489a959579b43c3f1bc1ae62f116f364b74a55ad8bc25f9de0104fee75. 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/QM4DW1673215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1babc482ca6b60d9b224166df2adf38e985fb326285803f89b817cbcbf0e568. 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/QM4DW1673216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548b828b8585eaab2f752f4efdbe50a1967b3367cf167104c61c08a29e3110d4. 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/QM4DW1673217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffdb46d69f5ebea5439668de2f16f99e2002bfb8e0a0ed66414e086062cfdcb. 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/QM4DW1673219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b83a0019c0cd2ba0daac1895ce0d9761af2b0be884ad56cc65e1390616ef9f4. 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/ROROT2400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce29d1e615ebc6d3310bd73510aca35a45406060e057a36e0e51fa43236a59. 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/ROROT2027601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90d9aad230063d05f84b62ebafed421ccc5b8f866ac94e2f92810898b0adee2. 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/QZMER2054471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7e38c4c825605ffcc9eb7b0b6421a6417f5e843826b34ca59b1beb55466a34. 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/ROROT2054201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd75804a3488b2b71b9335af8e75a30134d462064cf6d88522f18dc9d9951320. 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/ROROT2023901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d0d715e4e890a26fce0b780f6dbf6b2a8519f8d27dc85221325ffea6404f2. 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/ROROT2055201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dd23ac735cc7214808882abf146e4faec75d6a292751bac17e2f2799e0090f. 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/ROUM72400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8760281277dc5d4ddafc6fd47bc3c506eb02b7a9ced508125f606e3583dc2d7. 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/FR96X2387783.