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 0x8c226a942b20af7817da30c458fefdc183c322ef0ed718a1c716b7ff25d33365. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08764d27-99a5-490c-8915-b3dc291cc826.json and https://artists.proofprofile.net/proofs/artist/08764d27-99a5-490c-8915-b3dc291cc826.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 0xa94be85bfd36b900c857e6831a8a76c698873e5872a736d01e0dfdfb1a45ae04. 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/BRP4H0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad554c4c3b10dcdf1c2913772d324c881544b0c7ed29bd35013c4a7d21185680. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/BRP4H0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7726ed7108930539bd2bbda781cca0e5429c11300b5f453d7fb3e1df86269e1. 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/BRP4H0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0698309faa9261dba91e7c26d7ea9a8eeac52a17bfe4e6df4e303efd868771d5. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BRP4H0800014.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50828a05c76377772305d44e5962662c6e647c7c1c5e84243d29d05b47fa46da. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BRP4H0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0463f433d3de32b5c76a4686470b34637bb40437494ff0782bab9ac853d26ad4. 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/BRP4H0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3de8e0e9a3b04de77bd53cb73dee4c5cf5cbfe8cd433f80ebe42689479478f. 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/BRP4H0800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d3d0f39a69b6736a3a68a86cd88b56d63d6fbd7a00c5e1ffb756b602dc4fcb. 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/BRP4H0800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7646b8bf896730b23c9a92a1fd77507cb7c05462bb3032f571766c54ba1a8000. 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/BRP4H0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221af961db55128a602156de35b179dbe65c8e7c8e80d8064983024f79ab4fb8. 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/BRP4H0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca247b33f37e0401ca56e1b5760baefb6f348742f5e42f01ec193bf8e1fa6e6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BRP4H1000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9df50e59bce1804622103feaf24aea77fa8ea88c3b9dd92d90c2253b61c7b5a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRP4H1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a101fb55d500b8bcaaa2f73100ba4f18559a4656698a61a5bc6f436adb65d1. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BRP4H1000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db742eb9d144d8520a29558bd0804e4f987b462e6775316d95e8169cdc37662. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRP4H1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f02bc21b5f0c8bfddef245a579787bcd693ea000071fb67cf4a8e0a2eb30d8. 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/BRP4H1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888b1ba442ede1df0e5bc28f5c2ca57e946e806b1efe27e3b65f34ef5864e4ea. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRP4H1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce3b40f6a775b526d4c47b72b5bd288471944ebe035473bf5a902970f28f8d8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRP4H1000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d056448e3dea6935898a7847cc5054eedfbb948616b2abe07c3b69295d0e7f. 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/BRP4H1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513b0409f5c3b0664075646740243ccd1e936af31a49248a2460e297e6b0ca07. 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/BRP4H1000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba157ed8ed67228c32886f00ad8b5b2f600d1924b5ed5970a357e23ae2e5a8. 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/BRP4H1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ae87c2b9a8bce6f7f964a4f01c911c1ba14daf1e304b7dbf0625e0811769f. 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/BROCT1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1527b8a9847cb120956759447785da758b3b0f2ff22756dac1536cc3c03007bb. 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/BROCT1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487559fb02cfe2f7e25d3204f6d0cd953a6824680375575c54fb83ca9a82efd. 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/BROCT1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1cd23218d0443ce3a134cfd5b087ad4f0b59e51001718ade9c14e14c59de1. 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/BROCT1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8703bf28c2e4abbb6cd006c0cc2a3bf7fa540fa4e276f4853ae12588314eb4c5. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BROCT1300005.