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 0x8d7cf9e8f59ad9b4ef26ffded710deb6dfc1d95a0f9ed47055c82b4909ab4433. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee9146ec-ee57-4283-8bd8-5731ad6fd74d.json and https://artists.proofprofile.net/proofs/artist/ee9146ec-ee57-4283-8bd8-5731ad6fd74d.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 0x808be65d61356cdb5031be00dca34460bf6df8dfdc364d9104f23b0ee3c6df85. 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/QZMEM2404407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8972d220ad73c398695742b588c1243cbf9f7874c0c8754c9fb6a87ac0903e8b. 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/QZTB32348578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23af85a33e23d9c0c789d4da6082b5767128644caa2fcaeaf6adf2c0604c3c. 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/QZDA72078997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483f81fc5ab49fb8715dbca5a6f648e719275ae98aece6fcb7b4efec8fc5da16. 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/QZW9M2464225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea09ea88e365577ed85b32db27b6f25f98e9e21610d2d16aedb9ff9f2fdc40a. 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/QZW9M2464228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb59f7e8358f4ba2d98d2d8abc1fcbd39ab28dfc509e2d4eb452a6f890b37167. 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/QZW9K2432408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642519eb1ee864104fb1cff2f4cb2562d8d696cb17718a5671d958d69aa5137e. 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/QZW9L2428398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95584eb5930837f67036f1ff07ea46a0e25d284af7933ba78316f9c35cf1eeb. 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/QZK6P2410141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c5fcc382a11bce3a95d4c05134c84eb2ab008040e14846efb7a39c56ffc06c. 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/QZW9L2428399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec57985e84ec2dde8db6626bd1b9045cd18463ac2954926c15225f27dfef499. 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/QZW9L2428403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1475fb0c52b9f6710a96a22145a0e83bfee01455d5f9629c9ddfee5258471f8. 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/TCAGL2298194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3b28e42194335aa6f59a1705bc7b8351048794e2cff8f8e433f191e572aad5. 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/TCAGO2237838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c445f137e41cf027d5def2b2c7a10cf2b5b568946f338d6f06ab745e72befa4. 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/TCAGO2237841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa80f1c6b9fc36e03cff560007cf101568a6fa6221e0a8aa1188d65fb57ef5a. 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/TCAGO2288119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36168f4ce0242313281d22df27ed7e872bbcc81c11fcd1f6d32e931b38633f5b. 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/QZFZ62569822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70dd37e9a690551ac7ffcd3c1bed874f37a3d97f27d63ebb1581e9ac1c31feb. 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/QZZ7T2450713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d5a78204c7344ad86ce63e4cb509485414fdc6fde32ef7e802da91a807c8b. 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/QZFZ62569825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347ff8b3fddda46320867f4468e7dd144b654ad7d4afdda48c48f40b0a3b7867. 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/QZW9K2425299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee29229483cfcd0d538ee58fe8084ed45f92eed8560286c7079b3b7f35300d2. 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/US7VG2553152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8be1fda1ff5cc697571053834433f3109a570b07966488ba2a80d8ebc5d80e. 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/US7VG2527724.