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 0x05070c4dd80744f0a3daf64a4b0bd46dbb1b8650e8b24afb2bdc2566c4659bcb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f0f7a9a-4f7d-410f-9cec-0f064c8f0e49.json and https://artists.proofprofile.net/proofs/artist/7f0f7a9a-4f7d-410f-9cec-0f064c8f0e49.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 0xc523941c1f4fca1ac9559cc25e96339af2310166c3c0183c567d9158011ddf2d. 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/JPW561812001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ed2a1ea5aafa605c894dc475f494c4d4faea3e6fe1c687cda3ce08319b863b. 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/JPW561812002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a981b71746f1c1d9bd03fc9b6e1785bc47b79842b243df4ce9718df8adf6f5f. 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/JPW561812003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e1cb6bde66fe0929a33a4c1eaf2b7fb1151c5f3b3041f0ca961dc737d2138. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPW561812004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a067d3b379e948134cfe8cf3e9233c98ab06c5fc79648c6c3a0eb388340d8. 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/JPW561812006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0722d09b875e19ee805f9f0324677a66f29cc7c1bd11aa2939d2acf52d410c50. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPW561812007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe51a1d3ce9dec07958ec00ffadf984207bba436106866ec4c9003046c85527a. 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/JPW561812009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751b9269d14b45a1401eb6f4d54da2ed2c1e125fc2767048af5b73f8daba9a67. 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/JPW561812011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ba8098bbf457c3b49c25a7eb258c9fcd6919ba0620a77adbe2f58cb60ef10f. 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/JPW561812018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0b3ddc14ff37d3c8ddf88b289ee1c204849c9b604ef562ca3439c0891a8120. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/JPW561812019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410d8fe6eceed9f7a6d4b5ffaa4d88027cff4b4ad009a6684767583661e6d68a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPW561812000.
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 0x4e5267f09673717dd76cc6163331fdf587b44c927f3a8ceeb4a3a027b12d621b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPW561812013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48929bb2369d4c7ed8fa78cd66b64a6fe4f64f1177e8ffbca107490f0ac46bf2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPW562103232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6ff6a1bc1cd9cb3d05222f578cb630c79c9049f3a4da778e355fa4e85ed8a1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPW561812005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe67c02871958e11f182216e3a49d6653393336a9f6a101843b6e357af35ea. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPW561812008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9e3211268b268e7cec1a04eb13ee8df227cad8c7e851c5657648e21ba16283. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561812010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a4f17693e0de9240d35cc1d3b3787cf98cb68aef42f7a114d72b060c320fef. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPW561812012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71034f82978612a336def9c8e4da16abb9af63d525c823aba2a340cef4e4b28b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPW561812014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2d363d5de889ecc2f89fd98328943c571fe25141e628a717b19b6fb1ecfcd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561812015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683a17f9e7c36e084863c954dba0f80287572dda07578d02f75bdff631248318. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/JPW561812017.