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 0xb6844963a6fa4dbf6c7f08cc022f5e6b5d64083b6021fa98513bc1a8f1686a0f. 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/733390d2-8c13-452c-8a0c-c422116299d0.json and https://artists.proofprofile.net/proofs/artist/733390d2-8c13-452c-8a0c-c422116299d0.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 0xe7b4fcfc04d05a6bddf21c15c4233ebc9f932d94cd72c5dde7eca632007cf10a. 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/FIWMA2300475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ded98b663a314a7beee16bd3faf817060d76ee8f40bb4819d800720f0004f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIWMA2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe069a37a9c9218dcad3fbc0fbded0e4d1a6d215a6a45e4448222b36fa29d8986. 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/FIWMA2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8614942a9e197a8750a9d6f2a5c8fa588d5b5d4bbe592d87a2112876d7d95bac. 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/FIWMA2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba88c8740d348adead536c02f756dfcf6a3241010e48c2c3a0560271f349a0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIWMA2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15fa3cf68f3c6b56a9878f0486e326edd6adee70e54d1f44641fddd199353c6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIWMA2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d848113c05c59490913d48fa386a8e1b410f168e157db56ef9e92b7aa7cf1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIWMA2300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf31de6004696f02e6fcab35a0d7677d56947bd3f45abfeaf4e23f03af144b9. 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/FIWMA2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc40123534e778f678d3f4e4c86b3f4c4a9526673d6aaa5520a48cd400294b1. 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/QZES72363135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44503a3b6e2ab53a06fb75db06b279bf91dfacc32e805d19d685ff69098049c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIWMA2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef076c60474d47f48326f7b552b0413a118023f793f48fbc0527c0fdf44314. 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/FIWMA2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206fc8338a6de3203e3858375393d97d5b9defbb7bd49b661f68b69351b4f079. 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/FIWMA2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecd6dd6e23727531f016de88cbe14844ccb2e8a3cb41eeade8ffcf3ea2aafad. 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/FIWMA2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c0e449dbbee3fbe713d6bfe5b66871cb6b70120edfbc5308d1a55e52e47604. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIWMA2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd12a09d14fd9016dac8b4c411e82c39c0c2d99f20843dedef9fba37fd5ed2. 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/FIWMA2500439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579428febfedc218c12ed7f5c4ae79172c321efe19c333ba76f55ca4b8be0fd8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6M2369170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66276b6ace6cdd06b8e55a0025eae4ac4eb44ce250e2305e74693f20ca8eae2e. 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/QZNWQ2336093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e3cf54b7f6ce0ee7a124c08b70bb28e04487d1f7874577685913b8b277ddb. 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/QZDA62372571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc31f526d2e371ce01592fa05ae3764326894fb4f83b5adc2f3567159c9c989. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIWMA2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee269276389525b59d42ebdce7576fd8a1368368b1315daddb249a0f14a86d5. 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/FIWMA2300464.