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 0x961fbc26f1e1cac2592b6e5c0b84bc1071d6e219116df9c86e47a4379de20496. 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/0b8d4761-b87a-4778-937e-3d099177c300.json and https://artists.proofprofile.net/proofs/artist/0b8d4761-b87a-4778-937e-3d099177c300.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 0x9251cab0da9d4868848bb0a31e1a383af22e36f77b95dce92243f317eaf0fc82. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:22Z), 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/BRU1I0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b02b50aaed614e956457d4657ff5aea6f4dc7b3ced898a66f1ef7b4aedabb0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BREMI0900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb309e9615426cd46b42e48986cfd9e209a8f23464e966ef54d26f746376befd1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BREMI0900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed770e285b54834f8ae9e78ba7e5fb132949194dd78b3bd57ba864b1c3fbd52d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BREMI0900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23361b20db4464e6db71cb4b71c2f0184d8fcbd5fb831134bb45a1ae6af6cf8d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BREMI0900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace25d0d0a52af03ba678e0070c840b3b61e6099b6dd5afcb3ff4ee20bdf56b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRU1I0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eaf5a8c67178c9716e494fe3d300705ef5fc99389c4ec915f87be48eee41d0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BREMI0900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d84bfeaf3454a26e9fa1bf48cc6636b2cb75190e3cab9adb9741daef4771b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR6V82108751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e0e58bafd0d1a0cdc99676272255f50e4839e1c34b2bba1a661929c1189414. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6V82108753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dac6a38a1f67d2ee0e630f8b3b76030745784b140553941a6e881d216f2141. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US7VG1732873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf48c06bf37f270a560dbbaf389e9a29d85bf95d42f8e61a39a38b83861b76. 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/BX6NG2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455dc0fffb21655edc1f508666cc6a5dada6aba730866109f19f898a56203abc. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:58Z), 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/BX6NG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad918f3dac4e305e5133700097e44580f7b8eb03c95eed68fa200a5cc834627. 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/BX6NG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a994dc597b655a1371858b814563f5b51a5377490c252157219eb1bbcf26af8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BX6NG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c81d52027904a16e95d4ac7e9881567f3c47f6a08503a6a5b7e88974c7c6d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BX6NG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff80064116c2bc92e0d7ea29668b211c0938517016bf0a4c1824f180eaa4f099. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX6NG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a2862a30c9ddcf683246cdef07f4a5d77ee10513a59c7834a85b7006f52de. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BX6NG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74192cdb9e5aa681bbd20740d2f300e1474fd1b5f2c3fb869a93826d399f0b3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BX6NG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc531654d6bcfbac32a3cbf6f725cfea37e3fcc875a0590605f22304ea53699cf. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/BX6NG2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d16e611262125347ea0682b63e30369a754255ce40bca8ae549e6ada2a944c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BX6NG2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c23caad5859aefe08beba6819d021501d7f2c4cd9c74ab545e9db7e9fd3dc67. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BX6NG2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3848eb10500069ed7965ac67e24fb3381b57766b744717cc184ff84ebe4c032b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BX6NG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c293aaba00509a8984341a61024c98f20459dd2b777fe1dd7af93102a18cfe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX6NG2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf17d864e3ff6943bc4785cee99b2aad221f72bbe6f956e8893a75853065e523. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BX6NG2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66342a0496ec817be01d3c16072bd3bbbc5175f9cedc217187fd7c0cf7944425. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BX6NG2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab15ac8344a111217babe44049ca9ad5d0dd791075085e2e3eea9cf8369cd5fe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BX6NG2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2834c9358db35b55f025154623c45802a1674fc6e554e86848e220a1430447. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BX6NG2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab3931a0a07742a569557c69cd73031074f38a67e0698aded696f65607794b5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BXAT62400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9904b3a326ea744986c8fd3b6b2c9505a1964db2d9d9895b25e8baeb9244a01. 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/BRU1I0900007.