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 0x3feb3eb7bcbf4d9068615fc73183ff2a9396e8740cc4b751acafa81296fbe3a9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b68c42f5-bf9c-409b-a1ae-46b4e63fe8d9.json and https://artists.proofprofile.net/proofs/artist/b68c42f5-bf9c-409b-a1ae-46b4e63fe8d9.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 0x12faec46cd152903e4e78307c789e9cbf90f36b7f18638f0ff2c09c07c4dd809. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FRX202209774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a42af8196aa1c1defeaf24c4c96f764107f8ab52d9b6f1318cb4b7631c63bbb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:20:27Z), 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/FRX202209772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9446b23aa9ad215f1ec30fa73fcdc8096e485649b12a16d539de7a9da66ef454. 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/DGA052289198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d9cb8464ae6a6ed4400404f73a3fcb4a973c289852177ca8485b010fa9206. 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/DGA052289199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc52a1117182e9d1c7c8644d39633df6fdcd5703dd5a14d1be4e87f8d4deda3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA052289202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a3aa2b523f48c4c6da5822b9c312c7b71ceeb8afcc0b848a892e09aa6e17fd. 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/DGA052289204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d5fb8063835310b9bf3e59f21e278ea230cadc18519f7a9d1605ba9a2f6b5d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA052289207.
House Party - Live at Worldwide Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c2b17d4a9c2b6fd8d9d8f8195c55091eb9a05d9d3b821321566d3d7e5804e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA052289210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788181b463e3d0d3b2e9fe8974cdf7caa0ff2f8b53644f204d6e67f8a614bc8f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA052289213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cf235365bd55d8b4160be9406891f50b271223e8fcd45489127901668e3d9f. 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/DGA052289216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07194a381f2efe8448b172238d71f6f6e9356f7db249f6a09b68e0bb013d5c99. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA052289219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a450a7796bc8926bbb4f613ddbd5a30a5b2f5965b4fef6f7c04d2ee8c71e81. 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/DGA052289222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8b8b0b680321891e91996af44fa16a281cddb8f43d3e86af9b0b18eeefd8c1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DGA052289200.
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 0x3d148000303349c988e0913e43d896a495423a3acd4474257eb4482b15d10a74. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DGA082354922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc249b3a381fbe90501582418ff3cbda3460166c6f312ce8a8e41299db1db44c2. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DGA082354920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eabb93e0a4c5612ede265b966061b4a39f7e78369ede54cd4eaa6772f1df29. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FRZ132402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142e742f3a88407d6fab1195d23c76f7a4cc7d27935fe9b332024b05f26018b9. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FRZ132402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645b6ac27cc60fa7ad7f1b804ee43464fb57d3da1b63602d51e168c504bc0b3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRZ132418080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc8a00b6ce4084bfb673922778ccff576bfdae86f433978012d20812c80dd91. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRZ132418010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf320a79408c995845088149188c2ce4b130eda8835bd484bbb5fce616153cd22. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FRZ132418040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677d437f2ae5771879376f463062e59705213b27e5e5dc2687a3902a471b189d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ132418060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b74d5a71dcfad790225fc99be801601271d8f90a507df7fb90844096d7f0768. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:16Z), 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/FRZ132418090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6389b2a414becf859260371de2849590305ea1b34cbff715370f46c23dcdb3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FRZ132418120.