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 0xec8ff09d26dcb7af354b8fcf8e90e7e683232407468153abb2980e739acef505. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55759a08-af6d-43b8-9b5f-c52572cd89e8.json and https://artists.proofprofile.net/proofs/artist/55759a08-af6d-43b8-9b5f-c52572cd89e8.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 0x8bfb2f27aedd6803452b13a09a03d539c18e61f8c5c72e4d4d6c245a5f736a2a. 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/SE6A92322490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39de13d0b2c2c5ae420cdc45e275fa2493678bb0d8c7671b2a49a110d604f27c. 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/SE6QE2224052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f3eaaee246eb1a19ec7b149b151e914c01ba86b155790cc9bf7686bb537317. 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/USLZJ2084779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecac856d3face08293779b96df02af98c60ca5ad968e63a92976ed83bc8c4b0. 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/USLZJ2085171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf63a7c36bd5e249645d3bc1c23bb35b32fa67e905058334549e784d846a442e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2085173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3277afa7434f6182bb1468d37f3b263bfc3bd12d1f7ce18c0fce1e9b74682d7d. 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/QZES81944353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43212890c438689ebb71cccfeba947dbecc394c9f1d47b56d270c9c7fad6ab90. 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/USHM21974132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d344f7e746f086c9798eceaacfd05c313f9ec789b5e4126ad016076873b635. 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/USCGH1484200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bf56233ae9940de2ab35f55b6d32f88127002fc2f8cb567f337245e47c7f5a. 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/USCGH1484202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3b432fb932510338efdc0ef17b8e2b663ad940d88fd1c5cda3082957311026. 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/USCGH1484201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f4880a30803fb0889d7621f44f4e99418b7849cef462f569b6ca562a0ea4b. 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/USCGH1484214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ff0ab06dd8f38f190fa110c39b435aa41bcc47656ae87d4f4001c124e1d773. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1484211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b60455a3348bc69c85acc6d42613c680abcc25902069270aa68ade7cbaed23. 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/USCGH1484206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bf211468205946d592ed47000177726ba78621074a3b99e1e7ae85e99277c5. 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/USCGH1490215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a655126d7e29d8a081d7a1ad01fa734c60d95b49ce21cea7bc7097ca08505f. 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/QZTAT2235981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c77c8260a70c2af753084f789a7d2469fb7ef07035471728784f2fce196cb4. 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/USCGH1490320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c588a6de2dac4cf40530ba428686638acf39c4171484fc262448e429944d24. 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/USCGH1490321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3166b6ff863a2f49c4439aa6fdf8749c71e8a7972dbe33adb2f82d1d0c615641. 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/USCGH1490326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfab36971d7a5a8a711340fd7e2a86ebb58e35bf81a8fa9af47fcf4b135f7df2. 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/USCGH1490329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e5cd68d3b3e70ef7c01bc04e1187ffe53bdb12f1036a827d731ba7cd3b865. 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/QZTBB2216746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4d5f63ab28035876bc36e28c8fab761f4d895705d3438a2a3037a07b4a0dbb. 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/QZNWZ2298393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4ff725d0f4adc71e955df6a55c05c6bf220a8b54051a048a4f12e2ba47bfd7. 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/QZTBB2216749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155fd1ec5e4bb5335232cd6811057a742d9035ca2b29ba74a3d682c2fa350c66. 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/QZTBB2216750.
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 0x59163be255890cf5f38f35601c0c37bde00b5cf376781df42a043285042dfb61. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USHM81901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7a1da81e471a93fdcf7e50d6850b4d075c451d9bb02c73c09fc6a60d6b9be2. 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/QZK6N1993132.