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 0x8f28e584782bc806632d6eab4de0b42fc47906c7813f7c1f20dc33e37e2c4c37. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/757ff0c8-312f-4d43-be98-a875024fb929.json and https://artists.proofprofile.net/proofs/artist/757ff0c8-312f-4d43-be98-a875024fb929.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 0x33fd1847398d60994c01e0d769b3749f3cf3819c8d104d043c547911e99dc148. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES72204656.
Hittaz and Go Gettaz Vol. 1, Presented by Hitta Slim and Beeda Weeda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aa20cafd6fa60e5e44dee1fa206cdf92c7fe8bfda974955cc06bc617f0948c. 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/QZNJW2456430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78cc44c2c2cd2f96de5742b17f69319e540ab809d79310ef8fc6e0ffe8eee8e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG2420434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d663684d005661012ba2f4a84d30d7ef16aad97a610b5aee3e38baa71d9b536. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2385019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc9543dae35e21e50ee1de05d358f35f48c59da331eb6ae8807e55d1f310888. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US7VG2377149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce4028ccca12ed968a77de307bdc59d11e441735104c3bee7b36b337b55cbfe. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US7VG2306414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a7b14f8907aebdfcd8d49745d4b68005f954e692c927142cf21b48b4b7a87a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US92U1906910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dc8465a144b3c0f1018f3ec50d6d49850d35a0251c85daeb1d731ffe21d005. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZFZ72178728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65000bbf41ec06e1340980a002b8a412cd888260cdb908755d21e35d1a63be5c. 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/QZHN52001485.
Secret Society (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce8b53210e75c186993f0e490efe6f490faac8d72391a21510b5882fa374162. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USUYG1366384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a0a4ecd77cadda54fe2e703e0a1ad234d26c6925a8e1b3e94a2e473d562dd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USUYG1366385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2077c53ea48d69edb61634f074f3416d7593efd4b7690e42dddefdf37eef81ab. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USUYG1366388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2882905c43e2c6581a1c01dd2561ab4d0f0bcfd23c9a924a67f6dabb2e8400. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1366392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ca0abe9d8cea29cde60129c457ec2ba1c067ff1836df167798d36d4fa82fa0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUYG1366394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec969dc0ad99385a101186455e2b0751a5ebbfdb49f53c2d9845339d7fa832ac. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USUYG1366432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf32415d0dbbe007d0ea66c4bd468bfb52aea7de34c5903f956ddfb6545a113. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USUYG1366435.