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 0x837fcd8deb6562ee638079f7db97e57234f1e908a432aa51e77c0b3e021e1ba8. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8065b325-1776-4dad-bb8d-ccbbbcccc413.json and https://artists.proofprofile.net/proofs/artist/8065b325-1776-4dad-bb8d-ccbbbcccc413.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 0x88b46e6a96f532eb275848d55d4ae32910d383072be68a3bfd2921cc4aeb837a. 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/USA2P2251032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11935d3230bbb083202bf507eb2d63d677e0487741fb6d41ddff2833e0653016. 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/USA2P2214395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f559c9017b520fe5d8ad96965b1785fa6b5e60131d5b7551ecfbd6772ccc6. 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/USA2P2214394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46be6c1aa0aa5f322fef5f4bb5e494e328b7a81f770b55a2627448e0b9f4997. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES92297179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6488cb454912151af0e27680f3e06582923d68653b620a1f548625327f790913. 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/QZFZ22240623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ce76c5664b2d5d1c63bf979b98936c3437b259c392a36a0cdff0ea8ea84ea. 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/QZES92297182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5985bb1b26b1241085432f0807f48a51721cc559b7c5c2ea7e4d10412410ae2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES92297183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7b224403a33353d1f9a771c61bf5dac9bd4ef111dddd181b529f54ee5cb50. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES92297187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb712ad4229e33f7076317dc6ba8784ce52b14cada36d43fc4b54870e32c72cff. 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/QZES92297178.
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 0xb84cba57f02e699901c122791e418d47e287cb8a51ae0f336bb37f0b3e789459. 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/CA5KR2473805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1927d6a12c5d076b7760ceb57be59ddf48355e76c3e751cd40234ee2494a25a. 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/MXA3V2410124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b60edaeb4878d6531e98b84ecf3f4c4e318264a1e11b2dd87bca8df213abc. 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/AEA3A2317469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6bc92cb9e6e3125f090bdfd207d6f105e8aaa11ee9af4df866f29acbab474. 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/AEA3A2356612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4660dfbdb6c56b1264454f19d4c45436dbfc2fb8d5a472c25945c39ffa3b2. 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/AEA3A2370744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca2e35e9d1d373b59e69326bafd27e510095248670386c40790c4e2858ad84. 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/USA2P2315777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec325c7b92c499e7700ff8cc16d204f14403de0a2efe1f80ba98ecb287d6f4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GXD7V2439774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5f54df10aa28edf0ae1d4e8a5669efac333bb317b991d56618f616f8cc1893. 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/MXA3V2403120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2495a020688cffde69ce78e6e40e545de2f9344c14e71d11f11a00c8fe66f. 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/USHM82063352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8b0ab94b73386e75f452cc54281db8ef11b05c1692a7e635f189439fc1462f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZGLM2054668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b83ec7f4a25e785f53b235791cc0905c2da7c45f2e490d93a36d07d8a8d0cd. 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/QZK6J2174947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8802c412d7881f6ce82fab3d95b412a57a74e718342e7f6714d3a95f914a6. 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/QZNJV2162576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e795fa6262c74d1b1d88a3be0be59f95cd9ffc8663ca500392d771240a5790. 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/QZFYY2426241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeab82d1df9e59220eccb1b04ed2df37e427b041f23e1a2377afb2bc04ed35c. 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/QZFYY2426244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cae3625515766d9144472658b188f67c76114a8133744663d5563cee824139. 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/FRX282239906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4f10098cb2a12e3791677a666accc3b88ddb72686e5f6f0568ef7525e1145e. 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/USA2P2317704.