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 0xb41254a83e9fe4b40aa564b0864e9481dba6ad24fd06598e275164f484f16a3d. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d51e9ac2-b932-4ad0-832d-530828cf0f10.json and https://artists.proofprofile.net/proofs/artist/d51e9ac2-b932-4ad0-832d-530828cf0f10.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 0xecaf86fd9ba829ebb0f6e90a6150752a9d7827926e9d788152039d292ddf1825. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLZJ1384179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f1fdc49471275121047651a4f09743c0d97ea7030f0ec941f5f34ea564dfe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN1982286.
Searching (Original Picture Motion Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb666bca16aa9ff4d890c714e275777e1ae7e811c9a287432a2e18de367f83. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBWUL2068085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cea56d8dd6fb5f6b646de91d665f2d24cfbf3fc13afa7a6b7202c4124f1d62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN2024125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9aa7a6bfe4642e9d6893b3ccd347e24e6e321fe31cdb0ee0b2fbf69339b847. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDD2373785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d827966247adabc2cc8875a0d4bedd1e14b3cc58b4c1648627c59db8c390c1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB32341806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22269bd0be3f0d7831fe1bd3b67de6b27b63ff43567317e2b4ca6746df40d0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBRKQ2453906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c2e2c74a8a732d4c8bfbe9816e2b27abd96c6548fa0bbb3223ff5f13e1f4e7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWDE2413274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fbb69799c00ce0bb3101b8dc93c6ebdac9d4f4e753be549a3ee28ec1898388. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ8A2476365.
La Gloria de la Navidad: El Árbol y la Ardilla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42d3bf0e0f812b0831afc634415dab2acbc1f6c20cc93067236b158074c5178. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZZEC2459096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113b2fac01019b3859485ba028929bc10ee4104b8c90c72e219b61c803243893. 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/IT1O71300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb72b9163e824c31d4ffc5e5f1a7d10593986a68cd50d147ae941c0e7f03aa6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCABP1333516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69984bed11bcda347a31f3490389a55471f65fe23e5cbe9632044e9652399fab. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCABP1327192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb72b9163e824c31d4ffc5e5f1a7d10593986a68cd50d147ae941c0e7f03aa6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCABP1333516.