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 0xf60cb8bec03bb6b4a820473681b85ce4f7d3b56adb693b8161c5b3d2daf066be. 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/3e7e2a31-1e33-407c-9bf8-c7266d9e3e7c.json and https://artists.proofprofile.net/proofs/artist/3e7e2a31-1e33-407c-9bf8-c7266d9e3e7c.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 0x2775ccb2c27d3849ca65266e69227754d078889bd297b2ab0ffbd3e3d6203814. 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/FRX282366555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877480b549055d75f8ea159c10159add96c837fff48944aafd1dca3e9912b4e7. 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/FRX282366556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa590eeac7c2bdc1eeb46fc544bda08a2c23c8a869554acc3ee8845d6cfe5a2. 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/HKC992424552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b52b0443e494fbbd2cf25644e9261141f90beb9ceb811742f4050b27d6bfec. 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/FRX872476545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e5fef12efe08524b0b8e15f74df129db5b4f8135d4d558c4706aacdbf741c. 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/HKG732410036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb1a4593a22cc0f3065158e7a8d94341d393e19e33915b8f272eaa916792a48. 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/FRX282462238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd55f09278dcbd063a5023be5e830404c7f1b15086933132515269cc6ce8bf. 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/FR96X2451121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8acceeb75fb8d92468147430734a34db2d40eb231036f6b91d29f16d2070e7d. 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/FR10S2434036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31898823fb344577f2de0564dc3641faac4821b32c9c35217569db842f95849b. 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/FRX872323434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fa26741076938b286e4fcd9613f77c61adfa61c7670f17556edd1478c700cb. 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/DGA0R2322550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc37eb2b7c69d8742c92a79fcf29b868701c3e180561f8f45160e418b111710. 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/DGA0Q2372655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9906ca5a82bed39c44c234521929e03c406c272599dfd321d14ebc4d0c25e3. 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/DGA0P2375545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c090755565b9017877dd6969daea8032312bc27024eb9387b7e6e51f7e3b9d. 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/DGA0H2360059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68cae863abc2948da9650ee8fd313a07bf19e9d579651c5f6b5e9e471fe5bef. 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/DGA072388724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd738ea391066d47406ee3fa23efff23c4c6aa86261504877fe41884d9574e. 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/DGA072388725.
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 0xe584481837559f6241a7a0027d260595a479258eb46e6cb0cee65e01aea5df5a. 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/DGA052326620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413afa3a4aa2792f64d7d1d4de5c5e064f77eaffdfa636fed69ab18784dbe42f. 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/FRX762361966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073bc8b953e3dd1ee6404451a718c6e2bc34ce835fd6c0bfa0bed6a257f389d. 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/FRX282305778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d860642ef8df88bea2d19c64686fdfc6a61497bebdd6cedf988c4c629b0217. 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/FR96X2347560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba7fc5e5594a5d81f766efa32359a55d6c49401f877006c61f041c05cfa0e61. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FR59R2350968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7543693215a25658f41ef970d2dc250e2f8226f12076d2cf064eed85c293865. 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/FR59R2350969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5352edf88a5a5cf602107649362e485c7fb0b3508c6d902c1c1cb66f97e89667. 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/FR96X2307085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea9748417eb3bebcc951353323bcebf2a60afdfe81ee903a8be7ca2e332774. 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/HKG732271821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e90320a27b8144260d1ab04bc4b0e8e9bd90eecb2a4534e1a02e05ca70f40fb. 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/CNZ632201608.