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 0xef585b7e53c8721761d5e25d47f1e813e61e28117c98513d4fcd7bb44494594b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ac4d5f6-4a57-456b-ae18-0873ad745261.json and https://artists.proofprofile.net/proofs/artist/5ac4d5f6-4a57-456b-ae18-0873ad745261.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 0xf8a59452d1af54cf68d253dabf233092f14d610e95c0269d169ac73ffed98673. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBNYT0900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dd0ba38055df4f16370259f2e616d28e8b4567d8056c7e96346c6335d05e33. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBNYT1100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dac04a1d30c2d2c786d3f13ac51a32a47b97e7e0291ff6fc06d218672bb7669. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBNYT1100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec779ac26c6bf58824ce89779fce3848039617687dc809031c941daf32e7083. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBNYT1100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fce37fd3fc46509b0bff49f6a6152d514a59afa682d062e77421c1139223c7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBNYT1100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56e04d2ada875cb1df7c54054f97e7d80eb8c9b08268cc1685dcb4c8c74f4e. 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/GBNYT1100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c876f65a41d3b60e02210d5e806f35b5becf04d1d6cf3e812cfba9636e1285. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/GBNYT1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a44610c000bcf5b5b41389811c7a2bd7670c0dce9c868078e49837f60cfe3c1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBNYT1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08525c05273cf70422e069d8aa4307fe58f509f179b616939bb11c47cbe8753. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GBNYT2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce1a14a7af8400afb3fe560f004f22e68f3e3e9d931bb88ea8b29ea2d24c33. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBNYT2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7a1435aeb93166bfb8e6ab5080f617376a5477522432383d14fb5ce83d20f1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBNYT2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f64793ce87e546408b8f84995be1c40fe0b102f237e418afb3307b5a6c0893. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBNYT2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c876f65a41d3b60e02210d5e806f35b5becf04d1d6cf3e812cfba9636e1285. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GBNYT1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d3622e53e141c3c33a5447135a90af04d9cd08016015ea3bcce1574c8baf31. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBNYT0900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7a1435aeb93166bfb8e6ab5080f617376a5477522432383d14fb5ce83d20f1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBNYT2400008.