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 0x409d99921881aa99cae2bf4248bde86a6ca49069659b693ed1030cfb60babcd5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af816d96-7930-4e5b-8a3b-2726a3b85253.json and https://artists.proofprofile.net/proofs/artist/af816d96-7930-4e5b-8a3b-2726a3b85253.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 0xf5f59ca59513a5e90743d82cf4bce2b2ab03d875f206970b0a64213315c121d7. 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/USBAE2204464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899774e7641bac6e4005668bf6233c70f55eaca77003a6d795cef027fab40e7d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USBAE2204465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeb5e14a0ca371aae4fb3fe9110cfa2aeed5f9c2920167754bc8a32275ecb17. 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/USBAE2204466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6435c4263fb9abb7c2223ce6b15717ef126ae89076d9133826cb288a347f50e9. 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/USBAE2204467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93c6709a731b1978ffe869e88ad609297dc4d2c5d351ab0bcb6391cf51cdac8. 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/USBAE2204472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f79695a61e95fe5c210b9bad58bdee15a00ef63b2781d36c625f8068b0eb8. 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/USBAE2204474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cd155089bfd877f85afd34dae813743d43ab35317480c8a81491991fb253db. 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/USBAE2204476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5892dfea0c1df87df3b5adaf71ee1152fb2d0b0b8a58d395ff326aff120206. 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/USBAE2204477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e9eb790b548dc00c9ef830af03cf746566b410d62afe361d44c8aef236f44. 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/USBAE2204478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed041f185bb054c8d2828c7c49b6ff7bbbad0097705e3123b9eb982e5e4352d. 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/USBAE2204479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa929f573f1615a3b9b0c697f404756b60213d8fd4429b4c0ea437ed54fed7ee. 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/USBAE2204480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d2cd2ca6930e59252841ea4355cc2a4b4cb5119d133bb8061685cda33f7e9. 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/USBAE2204482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f12317cbfcea675ad3e34cb4d06c42e631f76e248457d14bfb6bb285433d3c. 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/USBAE2204483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e6579f8f68265d15ac0959c65c0081449164468ce4127150de60e4d9b5ae04. 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/QZFYY2351050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d82523bd053787aeeda4fa2e89e0cbf9adef7ead87c8867ee89a73a4a32eb92. 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/QZTAX2243532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488416c070d0c95e5f2c18c6fc772a19e65a26700c8df92b87b96a0b6db4bdd7. 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/QZHNC2263471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5391d31772ac83ddfe7d8a57f0b616965b07f28247dc5e8a063be90a24147d5. 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/QZNWZ2271192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967ebc92e507e9e8621dadb251d4ebef4fb6c072960b047d12d8c2bf81c4f00. 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/QZTAX2243538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426aa01e5fc5490ccfe0a9fde5d1cf8dafc766b023bee4ce51d94c7d387f985e. 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/QZNWS2248371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25453d7bfc086ca6cd607e957e247494e551e2597704703f6f0f99b1dcd6c056. 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/QZWFJ2407155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5391d31772ac83ddfe7d8a57f0b616965b07f28247dc5e8a063be90a24147d5. 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/QZNWZ2271192.