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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 0x61a03221a16e11270f2ced1c9997abf25eccb36cbcdf05fbc14c1c040f8ca117. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c1c4b84-ba71-49f4-8acb-c84b5c12ca7f.json and https://artists.proofprofile.net/proofs/artist/5c1c4b84-ba71-49f4-8acb-c84b5c12ca7f.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 0x0f90306e58eeb5d6c7144bf62f2e186d79d1064d0de92a64ef0fe62609414bd0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFU2460497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea927288df8e094d0b8115d764cb7e2095e7bd972f89af754e067281f969dee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFU2460504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896108e701a2b0951d0feadec063429512981e8de7396a08271ab12e052477f6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWFU2460501.
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 0x9b6190de7f2068db6046d88dddc790000f57598cef914ef5f8bdfe93d58b01a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES92427422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84394192ffdcd75fb46d338334c527416e714eec4927d6a4185662b4ffa3e7e9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES92427420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed876fc73bb9995a30e4b10ad72d47118f01c8352bf189f146f329a3e60dba95. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZES92427424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaee97f21535e6c349e358b390068ec08c72abb850db8373561a0f11f8548c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES82410621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33270eafeb63ea0570b4b838125dc60cb1187268bb4f7e879470ded709d84fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES82410625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d100e3523af166f24687de78195f76e458135056ed5e942081b8a3180699229. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES82410627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e294862b6aeead1354cd78733f2dbafde695e8c1e5bebeb8d347c7486ad5a7e. 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/QZES82410628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82334ddc80c1ab230954b4900efcf42e181ff9111715eba6d4f545a76ed0eda5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82410630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe2eac39408782c6e0cda9153ea31cabfe95be7c246ae799906929721275fdf. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZES82410622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcfadcec157bc6005cb9531c3bb461d73a1fde14e0d6b86dfaedbcec20ccbe6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES82410623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013086a8dd1f03ddfbfd2bb5f17abfb1e1e0fb7be279c429c243aab3b09e8681. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZES82410624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9607224880f342bed4d0834e8121c051f5eb948a4233e028c096cd5272fb303. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZES82410626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401bfe86eab336b7084d2997ade747df1475cea130979ad56d83e54905ac59e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZES82410629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d613f2d98e003c9386b4738951227705a3f7c6d4015bdb4b7d92531af46b61. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES52470789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94826104c6bfef78bb9c5820cf73bdbcc5712e8bf01234812e087a663ef3043c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES52470791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c896f77841559fe3a73bb457d133022039baa9d6277f751190c3205ae3095c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES52470792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08737531a843a8870b6d03922077675474baeaa647feca1d96fb824b6391f6d7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZES52470787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc29293c81f0963322d81ac77dcb7fa0c2189d418d5132587164e566995159b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZDA82439936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc928fcd2f01daf4a8debc0aeb0c27e023ae1753d4cce875f7cea338deaff7066. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/QZK6J2421893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f9f440ea01ca61b5a212823a711033e9cac6c46c00b0f4821c0349e000b18. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES92411939.