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 0x4de1fdab50616126a29e9df83bc9aa57192ca89cd86ecd5dcbbd3b74f2f10553. 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/5be2d3d8-b529-4a94-bbc7-15195108a43f.json and https://artists.proofprofile.net/proofs/artist/5be2d3d8-b529-4a94-bbc7-15195108a43f.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 0x48eeccf458fd459fae50a0bbce7e241aa989a6a37b0db19a0f475fc2130aac25. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/PLI971900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f5d57713a35f0f3e29ac69a2420c54690832828b32023ebb058a8ae62d0338. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/PLI971900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfbdb169cdf21c49bfd5623f87926cfdaa9a916c6c5a18b508dd7ce3bc67e89. 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/PLI971900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ddb467718e2c94e8f5a2745b813bb1e4e526c990ee403d43dc385112a27840. 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/PLI971900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f8bc9be3acab75acceb00394a649e13da9d18e5b16f90f727cd71bdb4230c0. 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/PLI971900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5787413a9d4065f386f3b7ec7ca88e720b2c88b483166d13fbbe791fd007eed0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLI972000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41365466bc4f965117ddfef7e5293347f8af8feae6297eac615597df34dcac8. 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/PLI972000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d229ef03700b583adbf6f1d2c3c50c9debfe60e2cccc0852a1c4153d7b1e27. 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/PLI972200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b35cd12505da6b70b4c6b1c3bc9238232ef225ffb6d58456aabd33c135bc94f. 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/PLI972200063.
The Best Of...Something Ends, Something Begins
What Does Not Kill You Makes You Stronger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92695767f80e1b7b2440b0a186c902998e133b3f51c9911e68c109c0e0d17bc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PLI971400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc783e608f8cfecc55c3ac7bcdab06b8f621d61a4274c47cba70bd09b4ecbf36c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLI971400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bc8bea2b93fd10c7064aa460839f294ba9982cf0ac8c858c32b0dad1da7b8. 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/PLI971400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5882b1f89ff589d068a13798b118c896879238095f4e00d1697328ea7816df0f. 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/PLI971400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b3211da4971918241022a5f74c89990f059e3e8eeaabbe6bbab16319c2f89. 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/PLI971400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6acfbe805d6a0faa9667a635e6c58bb7ceb0ff4b63d1d0f12c99046f0ebcd4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLI971400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83b9754523fbd5821d484695ac395ed4ee8e344ed95877fc57bd38f10f4f0f1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLI971400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd66f052c2fc172f9fc4fe57b71834536fbc8581648316812e53063fa57a8a8f. 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/PLI971400406.