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 0xc6817234cbbb6c7e4ad7de8205e2e93cc444619b2fbe3f6c95bf39ca688a0c82. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46bfcfe1-fb90-4d37-bac4-88d5ce2a3318.json and https://artists.proofprofile.net/proofs/artist/46bfcfe1-fb90-4d37-bac4-88d5ce2a3318.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 0x2bfca2dbba66e8de0dc445c1fd0726f8230ba6d26e127af34814268b6cf712cf. 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/BCA2A2300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf61026f4668c3f90f38c6a6e4e3b6bffdce5cd15ebe74c1d688d1f019963641. 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/BCA2A2400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2fa6894d2475dd9bf31e926b03bd211f9c36ef12a255abff6f31b6da16d0e9. 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/BCA2A2400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105e94f26ba6c2438ae4b1a76af885a2293024f54abc6e5d2c5a6c003439aede. 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/BCA2A2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575fc3e03d709d23127cc4eb0439f2548ff36557266bde212522761f9852267b. 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/BCA2A2400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ef48513f6f4a673a7bb71a55003e0b9abc83b6a5866ad2e633c8a0344dba03. 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/BCA2A2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453cffd38538d951f555082a889ff52247fcc82ef44bd327f0e39918b123551f. 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/QZNJW2457216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73342ee87bca801d6db25e9f92b1a9577b6c686a5efe9c1e3e02cf82c63c63f5. 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/BCHFD2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00335a65309adf0a8572fa8c780120bc08f350b3ec5a2fb8c07f0f96c3a6e504. 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/BCA2A2500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287950b6c4add9dd3684147add1fc587a2d3499ef311d6d912d9a1b7fba42c79. 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/BCA2A2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487937844ff88dcfc6bd2a9369fa78a3f7192f5a3dc66996c5ca1bfb3915db1. 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/BCA2A2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ada26ff73650e1f1918c9262174b2c65b2134c2eff0ef9b974379470f5987. 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/BCA2A2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4667c2c2816d4fdf91438c496d619cc763c8a0b23d41fcead12ed78441c4ab. 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/BCA2A2401184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5256310087913956f5aa4e86f3f1249e104a24ea281a60e9fc81aad57a44e0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZNJY2424878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bc8688ec76d0649e2f148ae6433a06de44e04cf602b4ebdac9758b4659f760. 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/BCA2A2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4c33ddeb838db07739880c164d9c3eb476cab17bc14dd04b58f759a35dd82e. 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/QZW9K2400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f1069b7bc7412346f810a37e601fdd6e9a42e233bad36ebcff944b2e430c6a. 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/BCA2A2400597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174c66e2b1aba80a15f3e55c6beff8559107d2175933848b44b03c250652600. 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/BCA2A2400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7587bddfd75288650cff6eebaa27780eaf3c2d1ede77f703553f31bcbeea751d. 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/BCA2A2300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b677a291ff6d93246be89ca26a694b617c8eff6fc824c4427a27d0135b7e9b. 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/QZZEC2302327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea28b4b0d25e49bc2f7790ae938a55832dc2779cd2102d993726b019bfa9e69. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCA2A2300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a6e84eb7bfd1f3c1aef50936eaa3da2f11008dd21d8694dfcd13f8162f21ad. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BKARF2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a64f6a9aee4e814b0e6075151129b34a2baf90ece57172053e92bdfe26b47. 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/BCA2A2300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66d3842234c9bd5cd767fca4c05cc0cc0b90a788ce0f02678fc24d4547c1f3. 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/BCA2A2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145259f1d17fa813ea0741b67f9768fa881185a1f2fe374844e317d659198b7d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BCA2A2300333.
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 0x0118d792831618c4882038467c54725ac12efb5908e49ecc42487f1569009ad3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BCA2A2300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b09f2976cccc0917ca567c83ea93db4e368be547f625365c3d332c672d4a52. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BCA2A2300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56c542449e3ba7f879b8e9d2c2b058a539f10718e045565cb9e875acca26a2. 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/BCA2A2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233127bd2fbbc36d2a31083191adffe46dc739c3689e7be7e2800a23d7861ee2. 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/US7VG1844610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9384ae1b12b11950bc8b59726dea07c0f9a988b9eddc17a8aa7b6b8c65c59911. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCA2A2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537331ae569c7749c1a72fa9fcd66a76a56c2458f4ba34689dc9a68b2db5dcac. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCA2A2300180.