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 0xec531452370ef574667c6d4cdd00a294efd0894e5b03a2ff70904cf33747355a. 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/6a26ebad-6bfe-4092-b1cd-5be4f06b8f2d.json and https://artists.proofprofile.net/proofs/artist/6a26ebad-6bfe-4092-b1cd-5be4f06b8f2d.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 0xe60de3b112fd32b0b799578798aba3da672e80f2721c3113a3afa0b8235ee7e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLQ8D2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aad84836a431fbb51c37df10fd0422568a147fff6805b73c7cddad56b74263. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTV32374523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77e0911cf981ffa9303718ffdcdfe63274de6dee963cb3351125b87f6bb34f6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTV32374528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce836ed5e9925d1ba7a7e6c4346e8af8a74da9a332fba610f7ba1b750e0723dc. 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/QZTV32374530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8456bb9776cf8ccc97d8461957185800304b24c61234f6443590aafa0539d3a. 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/USLZJ2051755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b22653cd062b5c7ea2b35f91e77cd582a8b163235bdc756d8ebfde4ad5f19e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2060021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9c3e37bacf788bfc78ecca98b8fc477cb14ec9e123f01d4201c8dd2029db47. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMWZB1810763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe2c5f108f7bcc9cfdafe3f1fc2cd807f5003cf1f2ce1709a0558efcee67ed4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMWZB1710800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d1601c47f0408ca494fe52eef1beb8a81e8e16e8b357198d11c4db4c85191b. 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/GBKQU1905337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ae07fc073b6041d2c73b82db4953e116dfb5f964af2cc83b97ef30031880f8. 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/GBKQU1905344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9606681111d9bca171924066bbea0403338138f326b05e61e29d16a10853f49. 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/GBKQU2060022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c51fe0b25d9e6284736d56cb6984965b29624876a80560cbed3fa48f552d4f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6541953400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33f492addd6d0cf0834cc9592471b18b245d3861ada4f09e10d8b20f7b80341. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2060074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1db0702d0fd0be745a8e271b1a7a7d15cfe9085f2db9ea85ca0255de1121413. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLXS81700028.