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 0xe76092ee13123b8a6a3da55be8511e2d7b08c4c35177fd0e622d96e02d2bd29c. Chain 2 (Bitcoin): anchored in block 954125 (2026-06-17T18:27:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b9e323c-70cf-42ce-a98f-fe8b98a842d0.json and https://artists.proofprofile.net/proofs/artist/7b9e323c-70cf-42ce-a98f-fe8b98a842d0.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 0x5693acfe5081016bea23d72c5e7ce52fad8f203070968218c1d96b83c4d0b668. 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/QMDA71847458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24951ada3bdf4c4e65c094ce698f8aef74f33e5450bec80989e2530270df28f7. 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/QMDA71847466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4611c8d700c5a55e925764fee2d46fc3b452f65e580a3cd3842e94c952a2527d. 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/QMDA61875212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300688792139e3956813fc1e30f44881ae8eb735d47f28646a91c7be6755c16e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA61875214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843cbc213aa59df9d9600e5c2e4ea66b482718b7efe35306b8c973d98db59a7d. 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/QMDA61875218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0adc343fca221993c9bf3928648253d1445612c4568092c570e91f4a7792d. 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/QZGLS2449951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0783a191177ea21494fedca2038c80a3f4729cc58f9d1363292df0f80553a. 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/QZGLS2449954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c273e3f53d017548e198ef5fc63d60430ed78bb664ecd4673727c8d4ad8538a. 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/ARIXB2401984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ed4e4a629936ee0bdbfb16ddde6f32270df1d33148156a7f529893431c99cb. 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/ARIXB2401985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4c767addb950a18296ec950f5f93a6942129eaa77a70a719aa3f4dafc8c240. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARIXB2401986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f215422532d82324cabf3927cac78fb2c9e2b7ef2c65973c2804082af38895d. 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/ARIXB2401988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b981564c4efc26f1294cd0df724240ac9dee943e3751a0f742f08f3a030afc. 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/ARIXB2401989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2069f9490a2b769fdc77bcee7196f7749d45420a2614d5883ccbaebed96a9c1. 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/ARIXB2401990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a00899cd66ad7a5f7293d1b25d4535188589671061ba027f48a13ed4ec36cd. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ARIXB2401993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315a05905005897b72810d06b59002129d4f84e7e8c89cf47b9c72b53790f51c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARIXB2401994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2c5b9ea0ad458d65f1fb06a0c8e295bf9c758eabc171ba4170aa220ee43f7c. 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/ARIXB2401997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389a17bae51d415ba7d7973a3d2a5f6b64b59fbc1f70a89d13a88a15ca0f8f79. 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/ARIXB2402000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f215422532d82324cabf3927cac78fb2c9e2b7ef2c65973c2804082af38895d. 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/ARIXB2401988.