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 0x5dd2b9fc317558fa5e9742dbed134e0cd82dfda1d2c07e33d39fd545f9cc1947. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0831057-d32d-41e7-901e-e224713646e9.json and https://artists.proofprofile.net/proofs/artist/a0831057-d32d-41e7-901e-e224713646e9.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 0x2dd71500bc54aa727b8b0d28a5b67a44f72034399f758d03b4420465cae0bcbc. 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/GX3HH2226525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428a1c2bbd6671fa5e1254876cb6d72d30bf9405b913771d6d8ad4d8fec247f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GX3HH2226536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ca3a2045ab852d2e4dbbb27ece37f0bfc698e31592d45ba133ad085206613. 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/GX3HH2226537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d8d98fec6f8c7c7f2c0b021751a8260876fcb5bc009a1b4fef1293b00e6ee. 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/GX3HH2226526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4388983469fdee95d9954131de245883405dae0be490bd39de286f83796bc68. 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/GX3HH2226531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf8547c70cf9df278ccbe8ef1a821a6898a65275db5f6f8d802ceb6f69f06b. 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/GX3HH2226532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7341168d874cd5e4a6524fbaf2bd3f557936782ac82a2b2a219c6aa23f4ed4bc. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GX3HH2226535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35769751f488e7906db31ee146fae9209afb3c911d6e96544843ec2b01dcfebf. 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/GX38U2594159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93d7ca82445d14882a0adbc9296a6d476bddb10a7d5b65e9a65f89a8b1bfca. 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/GX38U2584869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eeda9c01db24320d8066411c83940793e45ff0e3ca34497421e4f429721e9e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2503499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b425e757660d6b82f2badbb0df3fd511e53712409d1cdecbd27a3d521969e89. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX38U2570966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbcd1546cae16ed2997d23d493a638fcb84094beab7b30893d4ac2c63ff34a8. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GX38U2562625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fdd8d293edf84efb154e5eef397be87ee4529cc225c5bb47f31ef3ea701415. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX38U2571514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06c05cdc0c6991c590606204a87c8a61549e1cc0ce9b077cb5dc15ce0ed9a1b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GX38U2573380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e279342739d29e87e04e76d24ee6297c3952d7ff7602e8ae8724f0071c8809d. 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/GX38U2522796.