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 0xa75e342dff014b578f16846ce1c1a002f50e581539780a886f161a8c7290fe98. 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/fef1dedb-9a27-4f0d-bae1-a8830f7795aa.json and https://artists.proofprofile.net/proofs/artist/fef1dedb-9a27-4f0d-bae1-a8830f7795aa.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 0x911c10629b341e4680bd918ff6049795f307b32ccf2faa2f8b24d408f454e137. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMGW71500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba520bf037b38c22958535ff36eee3254173af999842445210ac61f163e36fa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMGW71500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb14f5a34cdfc85fc5c4c702f3833c3e84138b862f8925bf4970ad875e2353. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMGW71500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e7a52fbc6abce570d09c3597fab1e859273a23cbd7b60477b1ae07f4a0223b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACI1579379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab86ce4979caa3e56b15b827a6c4129b6afe68b1b4c16f2374a308787733428. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMGW71500012.
Cappa - This Is Love (DSK CHK Remix) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbebbb2b0c395d2b84e766ed05046902afde2083c4277cf9c6210179df017302. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USA2P1618516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09eadf8224dec76383bf419d945236ea5c1cfb4df12607ac82c3fed8e6912e6. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QMGW71500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e0d6d4604060fe14e0672431fd44dc8d1a6f2028f9876936c93d9df88ddc0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLZ541701357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fa75b8395d488aabc8293a77c3e8878ee0bd1a5d57960650b7a5f63be03ec2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIV2429951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf97e99a72cdb8b0770a8073cb8184d517027e58ccf757563856277c029a39b. 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/QM24S1815659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0df0ebffbafbf80f3ed19f4cc0b0dc373da62db1fcb61ad51e2b8fd6a786804. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S1815660.
More Than A Stranger (James Carter x NLSN Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5ae1be30de69e5fc1afb7190279c19474339a6f5061ce148de55031af4136. 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/QM24S1815661.
More Than A Stranger (Jaydon Lewis Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafb35fba7bdc6d1d5691d5e9f6291324a9b499af133e5e0d5e0372bbd380251. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM24S1815662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91def8bd0d1f17a2f3e3664f50c7bcdd38733df4540434a5f601a75bb87c9de1. 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/QM24S1814079.
More Than A Stranger (feat. Cappa & Ryan Hicari)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac4c75c756c3a197703b7aa854ced357f3801ec580b363ca9ce768be98074c. 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/QM24S1804493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b7d4ff80626a699a3b8bb703f487e494356058a25e524c5f4eb4577786ac23. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHN71910540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab9f1e138890fb2f1b3fbddfec6febb6888c56603f74c4019f1012fa96d5fbf. 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/QZHN71910541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b10405292c27571e2f257ada96fbf4ace76a12c6e74dfe8f67be090d8de9e9. 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/QZFZ72041714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129bdb7b86e8318abe7a8d70372fb3f516126282e484f6a9202e7c5891ce96a0. 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/QZFZ72041715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28480f6fe46709efc7a40343f1acb39dad085d6e33a5f9dfb6040e0a2973a801. 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/QZFZ72041716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48a39b3bbfd1b0d4adfd8ca8150882cfeab2e0ad0c9ec3984977750592593c. 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/QZFZ72041717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca19a6b9eeaf87e2bd672daf5cb5feb35daa77cdcf2c90febe1bb848a0a39b0f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZFZ72041718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41662c50d6e0075ed97f5c9932f25435943b9e9a4f7d010f6a18b4675b705dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMGB2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f02eeecfcf3a6cfc458ae380d9583d85305e0787f803cd774e40b5d4508a493. 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/TCACU1652386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ad5480b2fd734977aee686011b65d1f3cf06d7e30274953fc6ee6e4c6ba4d. 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/USA2P2229838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde03408ce878fc6db2923b3d35a82a85ffbed8d8d232c3c2d0464361782c5c1e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2129850.