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 0xb776edc733011956e01a2cd910536de6d757d95623435e32eee88a1228386bcc. 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/e6215d0d-3c5b-4f71-8532-5913d5cf9a5f.json and https://artists.proofprofile.net/proofs/artist/e6215d0d-3c5b-4f71-8532-5913d5cf9a5f.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 0x695a74be872a2955fb822dfbaf3abbac4d74aae333086d654f418090fa57073a. 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/QM6MZ1841657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcff8cf501a2082ea5568398413e3d076bb465b380d9eda11e64426e263d507. 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/QM6MZ1841658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafd028e6cb7a4abbc94c10939fc95221f3a135a8cb28b8b28b1125672f64944. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:41Z), 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/QM6MZ1841659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81527596e81dcef10f3bfcf86e42a620a23f5e867e888066eced2d9952ab71e8. 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/QM6MZ1841662.
Popurrí: La Batidora / Sigue Batiendo / Juana Pélame la Banana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60bd6485aa1cb2643a74cf32e83b5ce353ba216f35b42f0ecb3fd11fb26b552. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:06:21Z), 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/QM6MZ1841665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6886808187dae2118812feded77910aad33eed07b84ba3630975ad253d268add. 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/USJE61701300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c986707a29a619eb65d4538d35270b89f379d16e5222d8ab469d57b79e21f9. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/USJE61701302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f67815d6a53a09edd54e96bbea184c1e39923499d19de20634cd73170a68011. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USJE61701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53404734abc1bbc7b3090e723543b1bead1f8ca2b0612b3ef90867ae8765bcb6. 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/QM4TW1741592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42033b9fd3c0172f2c1c951ae2812cf9144bf31b35dbbf8a6ddcaff79ff52e1f. 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/USJE61701306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd469cd13e1949df065b16fc77706b343d786119852a28c390f6214f2f42eab9. 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/USJE61701209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01561f8fb140c7bce027bcba70a4e1889d6181eb7a46f041b216e734fd7e4a6. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USJE61701210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3582a04ea82756c1dc0e55dd4a2a70cb6d7e03eb6e83989bb7dadd98787dd620. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USJE61701213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dcea8bacf8f681203fae9e043db7fd5a44a017187fd3ba9d98150c72f17a70. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USJE61701214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0acabab9f70e9147a3383a08010cd2d5e00f77b503f80ecdb37ef9dbd80014. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USJE61701215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68de02fd7db0db4085f65252ea8346ba122ddea4c119372d7cd71464be6475. 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/USJE61701216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731ea509860b41f1c6d324d20e930fcae52e623e9f18273149780762f1c6eace. 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/USJE61701193.
Popurrí 60: Hanky Panky / Bule Bule / Yu Yu Mata Ju Je Jen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caaac627ccdf20424a748b951e6667ac25afff62489e0f80c201e7840a5fbf8. 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/USJE61701195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb582aa9cba0e8a3603c70fb3d7acdd1d0f99caebfcaba066ab344ba88da531. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USJE61701199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4773d63eefea56026c9270fca4f71a12ebabd37fde36ed881b24d3296a8c7852. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJE61701200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f81808404736fa5fe6a481790c58e0408d685b0f18ffbd68a9b71cd69fa8e7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USJE61701201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7233816eac3a78ce6c670b3946064ccffdf554e7a0a3272963d482c6974955fd. 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/USJE61701203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253d8d47f25a367baf558c158089e57a69082c245d708dac20aea4219f32859. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBSMU6376670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3048e3c0abb9ad6c046ae014d7186ea36d20460d57df75303ab20a7cc274c447. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GBSMU6400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80cc3fe351bd646c9b2bc1101d2c8edcb32d4cb8f853ea752560ddcefa5cde1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:26:31Z), 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/USL4Q2176646.