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 0x7afa29ee4a6a3705fe55a2d77bb0b79e12a37598dc66d3e3f414273f96ef5809. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/836783c5-f5df-4774-9178-0c7ed0b7b294.json and https://artists.proofprofile.net/proofs/artist/836783c5-f5df-4774-9178-0c7ed0b7b294.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 0x4504e5fe70d7774f8dbb36d8bb200e25eefe953ab1827d58eaf7561165cda934. 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/ITGFL2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadba03eea24e515ecd64165a3101a86213958f4cde6e0d7d695618a9787e62c2. 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/ITGFL2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e5b455024b40cbc3cbf3d4310f660c9039f5530262fce0d91e182ace7d8271. 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/ITGFL2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b967cf119f9d00a71fffab44af6e02272d779df5e53ebec125f3c637c04162. 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/ITGFL2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc013e7e0ba5f6dc469396e7f75adae202746612e0f0609ac5772da38e5cc14. 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/ITGFL2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6722b85891202137550ffaf6f4dbdc3639f22216575296241f817a0d384e08fc. 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/ITGFL2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67a992e28b540fbec7cbdd60d1a0e5e17125579d4aacfd0030e5fc0b33c9ea. 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/ITGFL2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb594099a85ba4e492e2945e4f5798ea5ffc83c2e9a8a1a7a275affcb037b8d6. 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/ITGFL2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8a112002a7916dc97a66ddf10ce495920d4064c12214eae50d546b7d7aeb10. 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/ITGFL2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b967cf119f9d00a71fffab44af6e02272d779df5e53ebec125f3c637c04162. 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/ITGFL2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44ed3332cf46517b27801ccb18b184efe626b1ced4a1e272e811b9a902880b4. 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/ITGFL2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c3d757be77b490c6e496a6fae9bdbcf0fdadf0b680ed421d54c2ae36a324f2. 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/ITGFL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201601c71ed5a962cd9f8e7221f3b9f6c25fce90d7485a3d463eccec7fc3b108. 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/ITGFL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af79e9a007979c4c8fd186532a8e55f9dd0cbec88d77bf0f27e68d120e00657. 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/ITGFL2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e558d73384f44d4f74128f4d045205b4fb9985031175a85f21507eb4380950f. 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/ITGFL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e558d73384f44d4f74128f4d045205b4fb9985031175a85f21507eb4380950f. 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/ITGFL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7b795efbb5f321342cd05eb78a730a5530ee2806dd1158201680d98ec472ec. 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/ITGFL2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1d6806e51d6edecb00804b1b6d212f25df593b698acf5407cb7b05eb3dfe7. 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/ITGFL2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b76655d3734abcd7184087b72bf72fe1d9a658c3da91c3088bbc3fb529d5609. 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/ITGFL2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f79ab62fbef79eb27a8e2035384b82f0862e62efbd0a79e948d11cf7701e3f1. 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/ITGFL2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e24c575b43fe5f8eb3b7a7dcaa5f14bf902e3762b1267250f52b2b90123e62. 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/ITGFL2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9329bba273f157d8222c2e1a2ecb236d10b6c4bf3972509d8326cc5a855bae. 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/ITGFL2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9329bba273f157d8222c2e1a2ecb236d10b6c4bf3972509d8326cc5a855bae. 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/ITGFL2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1d6806e51d6edecb00804b1b6d212f25df593b698acf5407cb7b05eb3dfe7. 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/ITGFL2200045.