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 0x083f84316e5025d3eaa3a877ac71d594c1e551a71a7a76edaf48f7963c9804e2. 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/4b2df8b0-4e5d-4647-a3d2-503bbaecde77.json and https://artists.proofprofile.net/proofs/artist/4b2df8b0-4e5d-4647-a3d2-503bbaecde77.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 0xa8a8c8600148730993ddf226e36228a8e5fdcdd28dcf95e947bec52c4f6e0803. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ51952667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e44652f10aa3dfc63a842e2047d2553891bf40a360e3a2cd8a4eb33a2a700e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJW2257966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915dc2b46d0faf027b375ea2764e79f981149f5c8bab5f428d232f8c26499bd2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2058442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545126bd1918548b4cdef72294ee5ae6dcfc29d0ba678e51fa9b1246cc5da38d. 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/BCOXH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd31591ad2e928f9b3ac70c52433f6a0d61412cd46b1f2220ddcb84eea9bc18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32376735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ef8947de9bde894bd3269bca5f09d3992fa531d6f3421a588e88a869ba7d0a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZWV32376747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c512d6d9cd557ef6e6d9894552281609885064fc86bc50e4c6ed1ca7020c89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32376753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46097107497c78e0b24b1db0f7746addee3b79896456237d1643d334286b1a0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32376755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1333801d7348bd3fd03dd0402db76f3d8597ddef4c3dce213050ae78e73ec3e. 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/QZWV32376758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf404e6f96c24b52df7736e43b268398b74ada28ae5d9beb6caee4d779b02bb7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWV32376761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d79e1cf931901265986c92a1a432537c892df49ed6081732691179febb95cb. 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/QZWV32376763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab3923ab01065276e07de2be6ace49a68698d86391cbe14ded97c9dfb16c519. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWV32376769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b05ea00b32f44b4a0be6a2e33062e405365a99c175d7c48ebe91c087fd41c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32376774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b07b12a126ba283bb3a527f0ab712c87dffb853af183053f07a99b3653ffd2d. 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/QZWV32376789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a697fc95d88a4ba57a9d96319541778df144133c7f17c12b6bd6b44a56dbe28. 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/QZWDE2429669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d5e1f916520127eb28b650f797d2867e58a8b8cc7f058c6ed93eda03c5911d. 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/QZWDE2360803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8fda391d123111c7eef1ff722d3f733561aa3e2d1ce4449b935e3252a7202. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWDD2315346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe220ea97a566294452f57a0441c97b9e91bdd28be1fc8bc39b5ea0ec1f53151d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:59Z), 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/QZWV32376746.
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 0xfee91fc6138db9aadf19c3e1d59b5a776ccdbbcef977bb489b4e681b4a69ab15. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZWV32376777.