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 0xdeb34b0ec9c9b6d7df9d3e50c1f0a450038118ef9a024e38fb4f7c19728b9125. 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/f17ec25a-8d9f-4c64-836c-ffaf36b90068.json and https://artists.proofprofile.net/proofs/artist/f17ec25a-8d9f-4c64-836c-ffaf36b90068.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 0x7e490a5ebdb6686a59c1a23922ff93edc1542fe912b885984217fe72ff20852b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA21934681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a7760341b71d6cc27ac1399cfbe01a370cafa41dedaa2222095d9eff118a87. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBMA21934688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e1e658042c68a114e9859274f383a4c39dcf6fe4dc39d7846f2aabb8b184ff. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBMA21934690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab0fec4b4b7185fe494e6b9ed23e8b0b0b5d83e997118a86e2d9bd6525691b3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBMA21934691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f799acd283dc2a9e9c1ee88c7d44bd83908e3ee8291178746b7e6797482e9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBMA21934692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537117cbcff335b38e197e931024b825a7b995726e901bf34eae5111e1ac06f0. 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/GBMA21934694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec76d253e9886831bc5ccd0e1d63eae567f0f9ac0ff82e89275633897229d11. 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/UKXN22030334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146a8eb46714e822c9503c3eafb4dab4e1df594be6700f69332cf67ed3541de1. 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/UKXN22030336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece8977d8216c432fdab09cd22930f8291763c8bf415782893731b45347fc32. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22030340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38d761945cabf9f50acdbaac5c26aac2959847da8e72dfcb445723062977825. 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/TCAGE2230368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddb78dfa768cc8477581d4e01605c320fe27d8025f75cfa092593e7071890c3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCAGS2368180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fbc21820c4945b6d23f9b178d17a7763f1f45ec1634e2efd91252f9c881fed. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GBRKQ2473299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f94ab0087d40685777d4cacd67e5f5698e69463afaa7143a7502d0436af430. 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/QZTB92229819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3856f54b175069734184859fbcacf3ca50647aa778c61982a1220e955e288823. 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/QZHNA2133550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6083db5edbf59b3d8d4d3fef0f3d61aa56c3f50e0660969d5816a3aadf084d. 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/GBLFP2371683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a59e80b2751daabee323bfa5a05182230b1f5384378f88780af6b53f6552eb2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZK6N2065403.