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 0xd746e82810bb8722f5df9ff3eec1f48100511bf0c6ebaaead380e69a9eaeb4f2. Chain 2 (Bitcoin): anchored in block 954046 (2026-06-17T04:53:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40def192-2612-41a8-b3d7-9eb73783d8cb.json and https://artists.proofprofile.net/proofs/artist/40def192-2612-41a8-b3d7-9eb73783d8cb.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 0x7f297e6cddfc28604505570dc949f996105211ba798de919274db95ba697fddf. 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/FRU702000387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37df05aea0717c5de8aba857f6496d443e171a8d9eb0d7698531fcd4560aada. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTB72245432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1379afa06a448689a37f1c5d4bcec69cf0ba0a71222e92190088170aa476e86f. 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/FR10S2008486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e242b6f6ae3f1cbb7c291a246acc7573485f8fe270cf1e0cfa6b1d9302f1ad. 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/FRX201920947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d96305bc69b116d73a3abed53ffef5b544d100ab7f9a654d0eb592b9e1ac8d1. 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/FR10S2008487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b155abaa26a7b0fbe8a5d31b979c9171f1f3c2ab26dc309e02cb75a292296d7. 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/FR10S2008488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5dc8b4445dbf5562e437afb3cd146f9d66033e6a5040bd8963db0ce9ec5252. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR10S2008489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8cd3a76de7ac09dfcd490b2d8153d95b6b673e9076fc6762b72c1b9f42952. 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/FR10S2008490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ba5f2709ed2a5f2184b1078aa8f83dd5f66b8af736f30ac0f1fb49746e2fc. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR10S2008491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe5211bb6b8abe0525eabebe4cb4342c5e5807dd3e3f4ba2ec60fba8fc77098. 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/FR10S2008492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd18ac91b3c40e8e963783cde2ecb60b54ff6b6fbf124d7a7b89f3096365c018. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR10S2008493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89388c06389c2c038d804444744704ff385def4504affaf1e04232b45d786295. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR10S2008494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac35c2aad2b207f5effb58eb06402c2b412610d912f11e371248a2645e6591. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX201801797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994ab2cb27a6f6495f54bf7ffff6e495683b70905d8313956f4289cb7c7ea79e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W12440316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22313fe81c0e02b29e5aa2159bf397411b9a61220d996882a57ac7871da2627d. 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/FR9W12445089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352fbf3ae23f0b142d87b52dd99ec9d0a8876e2f137b683cf1d534e8664359e5. 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/FR9W12445090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2883fca11fed6eb6f2a6be89011ef5f2ed7b84b7c63ba3144813894c9580fc71. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR9W12440317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa913d96bc54d46c0e27ca88416be1198b26baa07ce686aef25ff76578b1227ff. 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/FR9W12445091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84eafe447be3fccbdfc05e5f6ec10e6451f1559f956cb8bc4ef243d503363fc. 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/FR9W12445092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867bdf10f7bf0ee63ecb5513235f950a440ac123424e1143521b2fe52c02536a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W12445093.