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 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 0xed31959ae31a23983d3f230fe2e6e26d79183859a05e157ca05636dce323c7e7. 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/c038477c-02fa-4902-b6bb-6551ff1a5b76.json and https://artists.proofprofile.net/proofs/artist/c038477c-02fa-4902-b6bb-6551ff1a5b76.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 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 0xc856351b0a57ab4e7a4300e247abde0b3a25ca33dd2c771c97a60c74cf07b165. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/AUMEV2421116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35af73a9cfe4e521c14d2c86b2e4640be5c3b94cbce5f5cdd0cdab32af55f28f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAT2573048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d5070b0fdd3e93a9fc167a4dbd983bac3a7ab74de8532a47a8396aadfae9d2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB22579536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c97860ee018aef1d9a8c253cdb35b2afabfbf6726e5bd48b6f320c026f11c0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFE2559722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5109972dba4f4b974c775b9bbaf0ee574d5e4a65262f1f8c453d28f7870e0134. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/AUGBT2461130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e59ebecf5cd5b25db9b7783e4f0f6e4e31351e3363654c4be2abd53468e9ea. 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/AUGBT2460905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9647562c7d30303f116a8c38059d15b3ddd04d9a96a9b153c1cce623f39ac0. 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/AUGBT2460895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43b403b5daf25aadae0ed7f0d1e23cf4a512749912ce3332417658aeea16251. 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/AUGBT2461136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06a9f6fa3cbb1ad764397bdac4366c410da63eec2f4e48aef0fd97f034ad9e3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AUGBT2460911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df13310d2fdef0562d0caae83d45edae0b4626f3a0cdb19581872d7604e4928. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/AUGBT2460916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0e17db2c8f9b2fc11678fbba4d5e44ccec330042a87cc8d577048d0945b61. 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/AUGBT2460898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d8fa4880aae398e19bae7d855351eb9ebf7a76d3878a8bd184b3263003055. 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/AUGBT2461161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9895f17c49915b953c03835a51489c80e355be75b351e2a57ce78f6d9f81522e. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/AUGBT2460925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1850ac8bc7e98dd3cc5d8cb34d5522abe51a04ce60cae3fc2ea494392b872092. 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/AUGBT2460920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7466bb95a55090684fc31593898bdc20c012bbda9837e3d5c6d9de80cf267771. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/AUGBT2461131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd557d45e83e7d6b3461af48507ceedd58d295947fbe945c716278f3446cc44d8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUGBT2461151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc561427d4d537a24a67f35526726288e0faff3e2689790d0025d01a11a5b254. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/AUGBT2460903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f0fa5b54f6fe67081e53bc21ec16414d575c7fa924c6f4cabbc9a93c96b26. 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/QZNJV2377586.