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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e08293231652cf2b8a8cd7963b1f203d08be013620a41a723fd46699ba24c7d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/842f372f-b75b-4433-a657-7e75ac7040b9.json and https://artists.proofprofile.net/proofs/artist/842f372f-b75b-4433-a657-7e75ac7040b9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6509b6943bddbb9ed6ca37ebcb11220d3637de9c5ce0da88d4ca1bce28e30288. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR0U91402000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505bf1d8082478e7aac201319d028ead2e875461a2975ba6ac122b1570fcb60b. 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/FR0U91402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf0f8bf8486931b5c56b016ec01db1161af76ac9034a9255b6831d7ba6babf0. 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/FR0U91402003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ffc3556bba5ec5a5abc939db8f5d59e3d82198815655e468a055813b766ebd. 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/FR0U91402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5e6dc366147b622ba76825e1e973538a80a7444e33a70028f00951954d3b9. 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/FR0U91402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22b09ea16c64803f8b8cae1ce85f352b3917078a73d4b600457b76ba11c9fc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR0U91402011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2ddb005f035d6a523f25849348c6304263025cc2f9eb529593053cb353c036. 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/FR0U91402017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37c0f66d25cf593703d1e5c4beb2bf1210df79bc634441821ee9e85799c1545. 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/FR0U91402018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10058b099745c7c0c260c0cab29f1290a6fed5403b80e0de94a3d916a6e57dc8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR0U91402024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a36f852660178e6811f6be8304d1c51fbad1ed1cbbcbf0e4113815f1e8b2f. 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/FR0U91402025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735fc41ebe7fa3f142c091cf7d75deb51cc782ea2a46d21aa4e552dcd3c0f4db. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR0U91402026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d303c826baede294550a96bcc324c206a8005ee4d5bcde0e3be89fac3cf40b. 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/FRIDO2010578.
Dan I Locks Meets Barbés.D: The Belleville International Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7db894729910470d82bad723a5305520d09bc481073a1fddb1593d3014e8a8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRIDO1911708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00adef12acfdc31475647466674c4560f0f3a2ee4efdf9b8376ac2de67e78d31. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRIDO1911710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db363cb120290c698c056478c700c0057498c9a91292e52c119f965d0841af6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRIDO1911714.
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 0xb60de2158e11015c71c3ea0ba95650e0a3641d4d6feb4b172b7e4279fcfde74c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR0U91500496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a479f7c4e6d94e1022d1e2de17ca3c006e785f41d0d7e689963c5c015bcbf5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR0U91500492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b79101e8f23df8fc306f271674535d208c6f5c0a0e8072e7bdd27379f2c8b1a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR0U91500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e21177fcf5c3f76558f53ce2990e6d0fc7ac1c49c41f84373a6a25801b5d14. 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/FRIDO1911051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a39f6a5c1ad00995b1c816c9d167510e387fe89e3b266c482a8fbacc6868c36. 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/FRIDO2011196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd360f671c08e10f08126fbc0a7cfc57ed12ba90d94c21b4579a0c58a83b1348e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR7QO1500510.