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 0x564c7b76289d2761610aee5acc142cf49223d4c8e7fb585743a93749f85bf379. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96630ec5-d763-4ce3-a50e-391c93d12e8f.json and https://artists.proofprofile.net/proofs/artist/96630ec5-d763-4ce3-a50e-391c93d12e8f.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 0xacc18a8b12f2ad0c5c89ca15625659c76396ecf39cf709356de5d60aeef9c2f9. 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/CH7812105254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e25c4b366eddd52cd9047d3b4cbefce3adaef7e2854608f1f9ce87a6a7a54b. 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/CH7812189248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6571e72ff99f6e31cd28ec119ab2808c34235719da61cb869b791d897905c01c. 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/CH7812181103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e38aa6727ad9db3a780636c47df16c4bb5453ac21cb2e76439e586c94f079a. 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/CH7812530387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a0b9dfe6becbd937d12a596626584c91cb6963d72ad4053d3cebe3bbaad476. 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/CH7812419851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c3dcc4c8f0a4faadcf4af6b9fde8e52a7abc8a3cb1fed0088408de545fe785. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH7812368306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb477e6fc4cf49def3f3ed345eb5f92ce74fee42552eddf03f0208f1cab24a70. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CH7812359781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a22054acb15a881a9b4f608b2be9f13737dfa81e03d62ef2bee3b081f4e2542. 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/CH7812354418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2b408dadbd9841f444eee3c1f1bacb09f1bc99fe9d59957475f431f437bf17. 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/CH7812234203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0764b06bb1ca41e1a35435be1c4ec76943ecba40bf8fbe71fc1c66413bb1cc9. 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/CH7812229043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408860a8ac66e17e5cef038e54e7b77e49568f3e776d4ed5d6afb7ef4f96b9fb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CH7812198536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f76d68b87cd9b21f0916b53d06328a74948e27588858510abe1adf9180b1227. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/CH7812195601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0845742d3674bb0948dad6bb37006858ade52bd86f2d606c915a295c7d876b. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CH7811933055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa1d120a52fc0ae73112982abf730278dd018af6a2807ec4a67a050b95a9bc8. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FRX282307940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c440fccf34c7370d02753445fd9ebf4e8bad00314436b555337587f0506056f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX282307942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481c045636c2ebe9cecab920b5a15e5aa307b0c4acd685f4c51b931bd55cd618. 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/FRX282307943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc59a9e0866cad8745fd24a1a7744e9fe99481c8fe8af059c28a0d223458b36d. 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/FRX282307944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987cf6b3c51ed73cd74b17f28d2dbd42af5ca6466ae04ac8c64aea4ca5cc851. 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/FRX282307945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e69de0bfae4a5dc2c054af24f0df0474060635dcdc86e34c44f204ebde7dd65. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282307946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc5f75a629c978e792fd187722da1a9802ab98bd5291e312391a6b426bc1b87. 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/FRX282307947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7339afe26dab9c39b52190d828db1f50466c872ef35e378e493a419bd0d9b32. 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/FRX282307948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8795f3cfdda240baedf2eb9cc65126531bfdf2f3b73f625d2823b555ff397f0f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282307949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a2d6430803b45bdb3973c00c84297edfb010770cf180a4e96e287e74eb1d0d. 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/FRX282307951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51da6ce56d818e8e43295ddf9632c5e18c46a210d1ef15172a12e46820097ac. 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/FRX282307952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb3270db05aaebba64bfc803ee0101cde6007867d9f6fd9138c4a2d92ea217a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282307954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14821aed71f0f6befbe692c8430f9c02f5d0810ad5568b57e1011ae62256150. 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/FRX282307955.