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 0xe0ab56f0e72761ac1b212b3b81193b796b76277a9e68ded15d7a80c303105d93. 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/0a5a485b-79c7-4a81-be75-b09c9e66d95e.json and https://artists.proofprofile.net/proofs/artist/0a5a485b-79c7-4a81-be75-b09c9e66d95e.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 0xfac25db643796eaa82af929afb643cf650317270d3c2c3cbf97cce66f4bc6838. 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/FRIDO2314166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cbac1a7e9e445f5457299204fdec03b24fd18e54d7d08557d32e637d9d77b8. 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/QM7282008172.
Distance (feat. Issa Gold & Erick The Architect)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19105cba4aeb466a2245fdb2fa5b7e42ae6fb6244b75132a729c58076bbb2b8c. 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/USSM11903514.
Far Away (feat. Kirk Knight, Meechy Darko, Erick The Architect & Nyck Caution)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa41008ed8bf4b359a6540d66f0784fda224e3b70092066b540a656ef9abf26. 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/USSM11903515.
One More Round (feat. Meechy Darko, Erick The Architect & Nyck Caution)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6798e79857bdd260ab2a9df56e75b01ec6e1c42b70eb5fd73fd1e6d3a8e3660. 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/USSM11903527.
Problemz (feat. Erick The Architect, CJ Fly, The Underachievers, Zombie Juice & Nyck Caution)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3718bf339b1aed1d3e45d499124706101637974b0ae32aa8955759094fceae. 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/USSM11903528.
Bones (feat. The Underachievers, Nyck Caution & Kirk Knight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43576d66d3e5a6299699715c3b071d9468b9c4bea809d8a46b35945dce4e7bbe. 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/USSM11903512.
Puke (feat. Nyck Caution, Erick The Architect, Meechy Darko & AKTHESAVIOR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d73e3e3c1d094b32de20bddc0f782f5ab99f178f3627cc4d361632a0a39d9d. 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/USSM11903529.
Last Choir (feat. Meechy Darko, Kirk Knight, Erick The Architect, Nyck Caution & AKTHESAVIOR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ecbc3af168ff31c6a3445f7478681d7128920ec2a3d2567655864b0d90295e. 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/USSM11903526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e89acf66af3c7cc7b298aea3bcf55d468c1af9dde835b63376d1688fb1a78. 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/USSM11903530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aed59f58c7f948ad9307b2cbd71b4344b2f8c3c4ab5bcc75a9e2926b677133. 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/QZLL92239573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7a0736145ada7f2ad9f918053675f332b005e17386103be2310e426be3b6b. 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/QM24S2305052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1596412c1c0269f394c4ea97b3e56aaecd6cb3d2a4512f8e1015c105897d8. 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/GBKPL2202529.
Snow In The Stadium (feat. Erick The Architect, Joey Bada$$, Meechy Darko, Kirk Knight, CJ Fly & Issa Gold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5446553570441ee37457236d73b19366b12634f4d7c45a7efb19415482eb9f6d. 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/USSM11903531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aed59f58c7f948ad9307b2cbd71b4344b2f8c3c4ab5bcc75a9e2926b677133. 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/QZLL92239573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa667564b2177bc933c11c4e2d22330ac48790a3cfa9724af670eaec54b11d3. 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/QM24S2009312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b13a8843a9379c077e700ecb3b96640c5074e66c8d951c4c6d613388a3755b. 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/QM24S1926437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9399b4abf4f29a27efe85c71a7c925b050b2fffbaeba50b5d002c93a6cadb2. 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/FRIDO2313653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165fe0868e68aa883048cd082dfdcc17d100736992e3998b99381f9485785d2d. 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/QZDA62011641.