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 0x84bdc77b333365f5b42c6390c4a7cb082e927493885da354676278048144c5f1. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da201a41-3a14-46e6-8794-86fde39039d5.json and https://artists.proofprofile.net/proofs/artist/da201a41-3a14-46e6-8794-86fde39039d5.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 0xf14f7b4af8f197cd18151507bdd2e236e4a1ff6341316ce19257b19525b81087. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:32:35Z), 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/TCJPA2461109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5dfa049c67c07b8396bc085c3d18715a173d03ae1b8ab18b0a5b717222607a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:08Z), 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/TCJPA2461111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bf18a98d9cc65e4f565cb6afcc07d52fd08ce51bc8e57dfe3e112a7146c4b9. 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/TCJPA2461113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c075125f798cae738b0f04f2b255b95f5fc8b6aaff0a14500aa7519280d42. 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/TCJPA2461116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122705108c23df189ce5d73ede802c98d35d3c818105d81506e75bf63663d8d2. 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/TCJPA2461126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5341b2f3f747b63adb4991397a4c27cd12bd1d455179e8394c20b1bc57f1dff1. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:22:49Z), 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/TCJPA2461128.