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 0x1172d9e2638a3cf8974ea6a06beb7875618ba8840e88e3cd9ef067e5f6df97ce. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6799b1d5-26ca-481f-a076-c7638a3b6726.json and https://artists.proofprofile.net/proofs/artist/6799b1d5-26ca-481f-a076-c7638a3b6726.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 0xe0ec4e1c8197f42debbf5be9933e49954e2382e3bdc812cd3c760fa0748f35d1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ESA012060215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e17d951bbf8904e3cafbca9a648d149b134cadae2348ccaf305292038c4d37. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:52Z), 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/ESA012138046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e17d951bbf8904e3cafbca9a648d149b134cadae2348ccaf305292038c4d37. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ESA012138046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d045404d1e3aed57c7c5449f3d1bc8bc80bb9887d492f95dce3543048a45e7d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR10S2460022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d045404d1e3aed57c7c5449f3d1bc8bc80bb9887d492f95dce3543048a45e7d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FR10S2460022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80655345a8e595e5284a28ed952e92f9de032dbcce08cc77dcea096f7b07fd9a. 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/DGA092496572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80655345a8e595e5284a28ed952e92f9de032dbcce08cc77dcea096f7b07fd9a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA092496572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a22b67e51a66fe380157fb65f0a1726ddbc78c65ee626bdfc07b67c3e3a24e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0S2416335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5454ede0c40b3e4fd175d8033d8502ae347f7926464949096b997d7cfbc5c5a. 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/GBRKQ2571084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d045404d1e3aed57c7c5449f3d1bc8bc80bb9887d492f95dce3543048a45e7d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:03:23Z), 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/FR10S2460022.