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 0x223b50e04c42f0103050ff43016d849dca0cca023d1876a46657b7ede7a3b3d5. 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/482898f9-1bbd-4d82-b9f3-df5c81340313.json and https://artists.proofprofile.net/proofs/artist/482898f9-1bbd-4d82-b9f3-df5c81340313.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 0xb2394f67bcce93bd0c1bb74ca9061fd899e71df43c1923fdf293dbb733287aeb. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCADU1864652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274301ed382cdbde0d4d692ca1c8e0b0616437a0680e1abdf2f4c1dcfbe283d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:11:31Z), 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/TCADU1864665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cc9e3369def6db9e183f0d85594df1cb045c1c04eb0b06a2daff0967961933. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCADU1864670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb92b3fd6b031f04a8a2382da00d9a3ae0b258d541bb9c8263c892797c940e90. 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/TCADU1864671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c83490ae7c9cc112293c3aeddce899d70e1c72c0a792ccd80c807f6c55206a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADU1864681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e8ffaff36f3cc1fbb3332390446a4071b42b90c97d1caa4325b0dc8af5144d. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/TCAEO1924206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e0049687a2006b67aba9cfec53e1116d9c43316e4961ffdb097c6a80c6e48. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAGA2253971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a2265354f39e9b677e67a258226c8bd7b2700704225dacf6d66b5f6ba545a3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:38:48Z), 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/TCAGA2253022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec1111605def812519c6a1389d754427ecb3740f8f86baf762067092dfd5cef. 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/TCAGA2253915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd1f217c84aa638ac2469ecf860fd4a9625269a14cf94747bd583f2a991b36. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAGA2253953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6942cc4a451bb5de80bbd0a1e591a10b0f40aaa1fa0ae11c2797f9139b5522. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:18Z), 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/TCAGA2253963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65228c811f7227521039352413cafec54ac75f5036a5861baf591b6a1148ff41. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGA2253940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28471d63726836452a37e893157d2d1d1aece299f03f08509db3d62744f1139. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:21Z), 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/TCAJB2462273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaed725e1fae0a480170ea18b71041af6bb45311b7f4e59cd8514d565c325219. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJB2463294.