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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac63718a21ceb10683f5098150b03c9204158fe630f8ca0c8654ba8d2c62f935. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbb8f29b-d0b2-4d87-9aa2-e9d3e62cd407.json and https://artists.proofprofile.net/proofs/artist/dbb8f29b-d0b2-4d87-9aa2-e9d3e62cd407.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb892413d2b9fb9723ffe7e00a82c66486ba01c3eccfc1a794748c4a2ffea64c1. 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/SE6562200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d985b43cfc24dfd3139c57eb2597c31057e357a12fa3447e0d864ebe14931b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6562200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b082cf0fe3f1d968dd2fb180f6c883022f854dd33416f35609bbc20a88c570. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6562200409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ed962a17ac88bb48bf1d2e95e99ea74ee22f2cc606daef5aebb590a5b5183. 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/SEYIJ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804472a9d755f348a8a57cb1f8033f7c476bd45eccd64d946c10a0a668b0e07a. 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/SEYIJ2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7428c5d9ea49e74afd97053f7b7ff027de2c003eab46a2a23848360abe1c20. 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/SEYIJ2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a7acbf85a4eada5b1feeccb058130b1b481cb1b919314dbf6b473ec97ea499. 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/SEYIJ2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a16a48d9aaa06049de389f612d4822c114e99196975f1cf35517e3b2f1059c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZBRF1825461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b0ac2842c2ab731743b7cb53fbac8e0c904417bf4f68109f66aa3f3b06a783. 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/QZARB1879359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7807b164ce1e76b115d2fc1a51c8d4e691d20bb2de6350ebb0dabbd99b5a6756. 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/QZBRF1825464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935dd0dc4f6945cabe5a032e8b08cafbc906e8a81fc7993fa0349e07f863d934. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZBRF1825465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5b031b1aea8a23af5be8fe769bfb5d60741c493e71951e998fb33a37d85bfd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZBRF1825468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd113a4c3de5c79ebf0440a5bfc7339bfcc2921ad7cf287da9ad959a60a68b518. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6F2188509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ed962a17ac88bb48bf1d2e95e99ea74ee22f2cc606daef5aebb590a5b5183. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEYIJ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe89b6d987acf3d613a1490c600332495ca3afbaf273f626244c4cbabac5a47. 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/QZDA81954353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d99cc483610da31135ed37f3b1e77aee977c6c869297a9c5c383d0f0384bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1727524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb512dd123a74e96048014820cedd8f9939a7bb312944823c8d266b2e276f0e4. 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/SE6562500703.