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 0x93497a0212fc57553da909918b63c168cb7d91d3479b278963779487539beee6. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d61cb79e-a1b1-4ae0-9528-e0d0a1196cd3.json and https://artists.proofprofile.net/proofs/artist/d61cb79e-a1b1-4ae0-9528-e0d0a1196cd3.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 0xa5317859f546d0593bcfe87d36633cf42e8f9c6019ce0bdd1448cab8b1c8bd72. 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/QZTAY2347289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409f6b434c517d3f6264dce7d56c79461bda91ab1dc1ddeddb115e2e49b05c3d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTAY2347288.
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 0x0bf15fd30b5bcd51ba22de11ddb5222fee47c6b26456220378313b96cf559348. 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/QZZ8B2345640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2759c510d6a7798754c908a71a7b3176569254ef19e1a4e5b4d4b540503cf0. 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/QZZ8B2345642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5dfcdaedb77873c86ccf9c163bc04be7c238a0c79c02da4fe4a403cf4ac68. 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/QZZ8B2345653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e940b72720787e03f01180dd06ae7b781b17035630587a460ee9e9443459bbd. 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/QZZ8B2345654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf55fc715b974395a58399733bf6ad883a565e2f639dea466c1c9c05cb0ea88. 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/QZZ8B2345666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2a6bea00ab006ba5aee85286e4af10eb12c10af9e8d7a2027c4b25718aad6f. 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/QZZ8B2345641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74836261a4ba043b93b2e28cdefb8acd571142bee4998ce7a6c89e17eb1faa05. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZZ8B2345657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf7d215181fabee22851b9d354c0615b1b3bca3b62d79544a70ebe6b3607aca. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZZ8B2345658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076d40dccb8d4d2cc04141f90f58ae855f80db6ac47ddff68593e5062874331a. 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/QZW9M2368362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c201d87a0afd27023595152bc9580aaeb2868844267b0439aec25283a7485eb. 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/QZW9M2368375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2f6599a6f1297f0ea68e3b571a07701f954ed9e2aaafbe024f9d8c291cfad. 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/QZWFF2407461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d60203d41ff4850d770110e4f09935e00f561833c71d83603cc400eb2f0b71. 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/QZWFF2407462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436563386cef56d3035bdeb683182870dee8040fc4c9d9c8387052de2061ee11. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFF2407463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dda546b9e3e7ac390495dfb270f1de24bbf8c921ef37b0d774a2dfe5dcdf6f9. 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/QZWFF2407464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe996cc7348d2910df4a1949556fcd1c78b7f5ef63d48dc3fa42bbbea5255fa9e. 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/QZWFF2407466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c6d70990bce606fc3bf4d33d6248d00412676a779498fa3599841e2a62bb7. 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/QZWFF2407467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2444fd82168d060d69af6ffdcaaf2b97f23307a5d847ae4d129f1ae19a87a8. 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/QZWFF2407469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee21f7ec88d81bd2011df8aa021d537009f9d15b0592d170ce54fe7eebea614. 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/QZWFF2407470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e909eaf0a1889d7a9bcb9d2db4567db1e43d1359370f18571867abc59c46d. 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/QZWFF2407472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ef0b0b475e0280589a4399be6774e6ff6340f9d4ca6cc9656573c15c42cf05. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZWFF2407471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224f7185766394a8d9a52f2adc1f110fa43142059503ba300c32df6eab9dfa8a. 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/QZNJW2436519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13bcf8e03edd15ee080522d7b6e34235a2a8f78aeeafd4601a775830eb4c24. 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/QZNJW2436516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a1d6a84684a10e7d182de4b681932123a7be450c2ca019a3ea1720e7c5e43. 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/QZNJW2436509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d5c80f12e1d170c6d8403d849bd501279b53ac289b6c797f2c6d264de3cec4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNJW2436511.