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 0xac9d73b90a790a58fac68945d241a8e5177d0aa21af0fd04440205e68a36b6e7. 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/e014774b-ba55-40df-b024-f1a9e8e305d9.json and https://artists.proofprofile.net/proofs/artist/e014774b-ba55-40df-b024-f1a9e8e305d9.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 0xd93341a5f2e1ffa8bea7fadc7e0e699d4f07c60a62f70fcdce5ed95010ff0bba. 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/SE5BU2243786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5193a416163f8cdc43bfc67b3cdc62428693daa55922318c781319b22f79f086. 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/SE6I32223975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0492a51d24e43a4245b756c3c278238d764455d9722ba520449d17cc43d2e8f. 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/SE6XX2327318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62af0f4c46912001565263096a0af813777284288f3fc634bf9cd2e1df15608. 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/SE66N2219770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb7da17bb2f576cb39a29d86ff5374903cd6901cdb78db7361548cfbebc63e. 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/QM4TX2488134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fee6945922df2c434d0e56cdee61113da469fb7e455a15679928dcf92c76e6. 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/SE66N2253358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a31ca17eb24769a78ae4d86b5489f16e87f37a7baf591843c8f6c682608aff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES64E2307050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9bf62717fb32d89e1b3b64ccf5d1eb1b638e832394e534c2ae973ab2af265. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/SE62M2206742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370422303b6f4d781a4c0a166fe42982d502938fe0142734c11fc5ee5af0727c. 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/ES64E2204588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a1ef05a498481caf9c42804901007e13bb0ab389e0599ad4e23b45197670cc. 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/QM6P42025641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b5288a0d5364028f6700f1ff944e4b542c3b3da8db8ca4021e3080c1fd9ec5. 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/QMFMF2234905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab30b363b8478ab66beb1703d5adfb9c4aace228c5fffa0a1b5f988685880c5. 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/QMFME2302633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e90372dc387e84c1afc9e625f40f7ce1e85cf95ca4c4e323104aac2c9cd30. 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/QM6MZ2404894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd9b1a95123e332b6df27101834f03e8f0f13d5d53ad777f9df29f2041cf7f6. 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/QZES62162916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4d561643561428f6be11e91bcdd35d0b503df3b198e9b10a1c3c70eff1d9c6. 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/QMDA72314882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda86cce38f7d0734705b5cc5771d8cfc0484e552ef1ab895925ee9066e551fc. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMDA72382928.
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 0x8b3b1a3ea0cdd379cc23b2486c7324865ef32b57dd3a41b0b8a54461940b5d6c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMFME2302343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcf9d11ca9aaeca637fef839032ef5c2e457a1d63f5671e36a206e8f3c80cd0. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM6MZ2404832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c456b65fd4985a63d41756cbebfb5937629bc294a26a3b76316e0915b35d897. 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/SE6XX2190742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a836c128592187b115a872707b6ae28ddde6839e9c8654bfb9b1d65548910e2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA72314842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842c000d6f722a3d923bc81712538fe87ef9e836dfe9cfe75b8f07a07d68e20. 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/QMDA72314971.