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 0x193a258cafe681d783b3ccfc0a4353201817085c6d136d09a62caf6ad78d99f8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bf52ef0-46a6-4384-b253-81ce3f7c7e4f.json and https://artists.proofprofile.net/proofs/artist/3bf52ef0-46a6-4384-b253-81ce3f7c7e4f.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 0x6c40afb0385aa460c8371ec26c9b1d71fc72f74b453ed1e8049863b1436196af. 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/QMDA61576633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ffa8065a71e3ba59160855296a0ced1535442a16864849345967b8b68cdce. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:19:29Z), 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/QM4TX1776131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed735d8b5558b29543bc5bf7534f59c8c1810b857a21d092bf106243f401f08f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM4TX1776132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fde78cd4e5ee4ee00126e0eff9a7b9311340e22208de17c12bbf47f7dee9911. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:29:29Z), 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/QM4TX1776133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8696283f2a94b773957f3764cdb00c24290b3fd5162582da8313d0b0486ef6. 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/QM4TX1776134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d92893e903a8173094e02b4c9c9b5902bffe2d4c0c80058a171abb16d18109. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TX1776135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599fb699e5ab989a2d6e318295e632e90b7eca921275ee44b1de085aeb2c8dc0. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QM4TX1776136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c12dfbc72e613ce566d7b621479cc06f36b2f94894aab23b1e49f06b0cac2d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM4TX1776137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e57ac7048c66eeb9143097823119790788e031ad6586882bc7b495ce7325bb. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QM6N22017484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992ed94c0c2d7e32159d6dce3d481debca9a339c1fb034c4694e027a7755dc99. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:21:56Z), 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/QM6N22017486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa85d4a8445c2816557dd8d9252b1fef537b741df32e226a485e8e64b45a1e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6N22017487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226afd4f6adb6acb7b37760aad1dba9f0562c6b42cf5910a94f182b7dca3c4ea. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6N22017488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a1577b0cd00cd4e6bbb4632b7d1a82de25a8d05ff33108af6843323b0eb265. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:33Z), 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/QM6N22017489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cab8978efef69bbb1ef0b3a89cbbf3aed6eec652cfdb7718041f65ad3fa3b45. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM4TW2438043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196053f08a148c18d133a403be8a4bc543b376824ad679891e2176f84085eda1. 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/QM4TW2438046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdb8267852c96023b37633883abba26dccd5b159e22c82b3338cf0242bfe9bc. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QM4TW2438049.