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 0x4f727b5d29cc27197667519d4adecad353bb514206cfec9e38f0212802371aff. 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/1c4a8170-3464-4ad5-8f56-5c4452c63fa4.json and https://artists.proofprofile.net/proofs/artist/1c4a8170-3464-4ad5-8f56-5c4452c63fa4.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 0xecd0e90178c3b079551ed901d50ca798aa90713e4af60ea3c96a8708960aac47. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJY2382507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbeb3a91503fa636d102639be119c5a2b45bb4b1f19beac0d66a2b527819abe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2297455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad80d1ef6d2e0c6e8ea64ef1cbe9db0fcdb0202345bc6377df79d25aabf6d52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2194493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43c0cb1534fc877448d2b805e927cb8a56120a750b1ebd208833a9118d5b2bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2429144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1ddf022e2cd57079b60626379e36610047fbeda4753b5f8eba1568e0e4943c. 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/QZNJZ2473110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6881915cbb42efdab7d733d70f8551a8d7ef85b47b882408ad58acf2a3ea1d. 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/QZGLS2495395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b9a379c23e8464ae5419d12922463bd3ab53b9b99079ef7530a7ee7d7226b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG2489180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a63199cab307f9977003aef7cacd13833204cdc615afa55f2819cdd71b2df1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2320788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af065b9fa1f000f8098b729e5d3c424b9928338102ca435d4e7356abbc4c26. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTVM2394657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dcd17c10d75d3456cdc502158486b8c970a19704256dbc4fc91eee1999099c. 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/QZNJZ2384348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194c48f97bb669c14be9e21b44886200dd03ecb1274f0b089c0c29a67bbc8a66. 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/QZNJW2258803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5108bff1e9609c33ec94fc814ffd4f6124ed75cce3b68e7b9995db69588cd14d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZGLS2292683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdfe8b068130537e987dee806ff36566c1a3d66a36b4346aef44c63417b8b1e. 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/QZTPX2120849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96d7e5d52d101221cde463d91d904b77f9e6ee06fd9f7da2e89a86e71db197. 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/QZNJV2181983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9a2288deaafa8b52f2c6ca63236cf0403bcb989ff2b2cc3453ba4eb88b9164. 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/QZHZ52152611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d45b14eac1738d317d5e8035c25b4dfd1dca0448b3d03919ef0e096d2c844. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGLM2152629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaa0f9d00915899b01dceaee58c04c26cc385ee01e949ac068fbad32fa33b39. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJW2004128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fae1db907120f09a06399e369dd0af827b4536ad45ad5f20b20f247670051f1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMZ92085175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b24b7b99541f08f8be6a5b397208a0dbd4a778c885f990cd81732e213b3921. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJY2107150.