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 0x98c037225f12f9ee7545fef856e44ffc09b142f59776337089cffebe78b987f2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37f96f16-7deb-4261-8cc3-0576eeb8b7fe.json and https://artists.proofprofile.net/proofs/artist/37f96f16-7deb-4261-8cc3-0576eeb8b7fe.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 0xd3e46a9b1a0974b0340da45ea84258681b74f45af3e56c072d308977108e504d. 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/USSMG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0f55f254cedb40d0b3f3a7d1ac40506cf0663da8d6251f388728e06f23687. 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/USSMG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c49493c461792e67e547f48593bddc0086e2fbce6912c55ec77d2d9d3c876. 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/USSMG1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6529b181af0840762bf40bca9002b7d3d58fe819bef7847db48a6760ca9e4b. 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/USSMG1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d02c750b214a1cd864da2c297b2ebd44bbbd2550cf041056cf4af30799cac6. 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/USSMG1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dad065d23b6a53db8cb3fb342cd4bbfd7b29d4e7c12a4ef8703b07d51a170c6. 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/USSMG1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c714a07fdef13541849efe78b06f0b60406d52fe6164d446ed0e7f5115445. 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/USSMG1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43eff156a674f6b4c5b932e3a04eb2f1b23e8f93dfaecae639d605f643943c9. 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/USSMG1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abdf6c771b49cab0eacfcac42e7ebdb7c48e6f16201bd3c5b62750cf8868836. 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/USSMG1300012.
Close Your Eyes (Remastered Edition) Solo Piano Lullabies, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4be04dfb862692ee652eb2a96a2d4010e7efc4b3ad29dfcbc28dc519bf7f18. 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/USSMG1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f17c0a3d18a24957fde52652fe16fa2f02b182cef19c3bc7d782f0011b7c2d. 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/USSMG1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee10e18c8421619613d41c71a4ba0e93077c7c2f73f98de1c5ea828cee4749bb. 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/USSMG1000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa794c5f61fda64f13f10262322a397cfecc0a7c77b2f2407a86dffb18ab80. 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/USSMG1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe638c396604a6863a24ae8aabc5d5b4ddb40f844bb0a3341b7c61cb3514f94ff. 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/USCGJ0532055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f34e02caacd3a8ef218705416e3e3575d7d2b6cd0d8949909b28bbdbe940c4e. 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/USCGJ0532061.