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 0xb4364365f2f46d808a78aea9f267a3b59ca0bebf72aa7ceb8fc701a261525c31. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/beb3a6b6-9424-4867-a393-399629387c90.json and https://artists.proofprofile.net/proofs/artist/beb3a6b6-9424-4867-a393-399629387c90.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 0xf336bf62c14dfe21b77e0e68eab68c862c828f9493743176214b4a28775ee8e3. 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/USHM81876557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03811f6533338dafc1850334a7bdee373cd68d3258f58ddba21819a6144f197. 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/USHM81876558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363bc667f946dcffc4b1103623e638f5bdfb91b93dee1b8a3540e8f490c3b96d. 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/USHM81876559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6282395a78b50e00b0db18458c65105eb6b4346bd837735561b1bbc71f0a4. 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/USHM81876562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196d071d9bb57b83bf0aa6b6f3ed99f32647f9477b7a75926b65bc8b7f0a1a91. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM81876563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e161942eed5c04d90904eb403ed54a83361babcffff5d6a4d2d963df86125e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM81876564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196c8b201d0a97d0041d1368fd31545ca9c16b6f2889d8b0b40ab95e22d011a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P1448160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0691acc3ab08dbcccaae555beb1b5ac19ad29641ddd9a0f3ff34d2436183e4. 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/USA2P1448161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63079eaf681eaf95b294d3c0dc5bfcf0c0a058b7b82a0ffed6c3ab53d647171a. 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/USA2P1448164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ac412b35c2d27ee0d9b22197bc4e35768791025ad99dbb361128d4efa92c7c. 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/USA2P1448166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189da73b9c6a86b1c295142ad4974ffd5a46ad7ddbb94b0da906b00c6a6849f3. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USA2P1448168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9594b18b389ed12f2032554fe4495dcaf3e330d68c724fef06aa4d666a4980. 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/QZTBB2230725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf3fff306d442465207e0f5960c9469e79a14bece5f0134f5432b878c66ed5d. 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/QZES62137342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdab8e2dcc707c1e439f7eb3f405b781ae106b088d48d8bd745949c8b91b57f7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM4TX2069935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e88ccca5188038ac2c43711248b1e9f8b2e281a42b5ba8995155d7da758a680. 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/QM4TX2069936.