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 0xc7d9eb9b02f946b7b0e644c1d6eddb2b644238ab666ba34310d1f53570b2f232. 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/330411f2-2d98-44f4-8db7-67dab8200658.json and https://artists.proofprofile.net/proofs/artist/330411f2-2d98-44f4-8db7-67dab8200658.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 0x3098bbed50e0d673155e7077d0143dcd2357fab3d448fcb2939cc0380f7834ce. 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/BGA410601224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37368ecaff829b766dbb2c4fa51c09529f72fc9603096aedad156ef205fcea15. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BGA410801016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db128bed746edcd474f39d902bc11e53ad5dc4829f56d1f263b4728bfc13e48. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BGA410801023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b46a48b8a39e7f440177db96795ad661649af7de5c7d5ff87221a14fc7ac6d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BGZ411801903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0241dad1eadfb808bebd01d916e7a942d01a74ccb942a28fab0742894d6d451. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BGA411103017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4690850af6bbabdfe7099df68e3db2afbe43618736d94a54ddfa25883749d62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BGA411001058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613f367cf354e9756bf432e47e78cd83f65a4e8e40910b7396a1c0703861e15c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGA411001061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fea197749bac7ee8d9496c2d5f53d7a35381ff09ecced886661a307223526e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/BGA411301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6b07c8a1e9a6c95cecd7888d8d80ae67b5f1341a29cc8e361b1ecf767b727. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGZ411800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88919ad29badae5f5f207fd0c4079cc4ce8ebb66ff8a0691ec58de2b68814178. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/BGZ411800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47213e4613dd2f54f6d78f1de44691f3c30bdd28c1f638582c4a8d526d2994d0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BGZ411800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75011ba6e36c55924d2c0bb8f5786d04aa67088f7c919dcef6858ea5ae4e5886. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BGZ411800238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ae08bd1f3e4ea9294a424fe5a52b0151e06f579e4a9cf7cd2123fafb3c649e. 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/BGZ411801675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d43cae3b75d7d56dea5d438e9cac34331792989e65d29b2b664b785515cf94. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BGZ411800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c8ea1b6159bbe7a26fbd4e68ca1aa2b062fd37e446329619ebf9c6473b5065. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BGA412000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4e08ee57448fd46cff1d6c11e54e45f13f9c015390c3a7506338400d65cad. 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/BGA412000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe021c7866f9b151783715fb4d786e64b4c8f43207abc7e28e1763f7cc0f400cb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA412200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff42fbc57fb28cddf20b9c7a5db0ecc58be1414043675a8b2ee4d33251a1ca7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGA261585040.