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 0x99742f85355e9c82e7bb5545601fb9d0a9ff296a8eda1df8795deac31d32f1dc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e49ec22-0dfa-45c7-a06d-ef7dd10562ff.json and https://artists.proofprofile.net/proofs/artist/8e49ec22-0dfa-45c7-a06d-ef7dd10562ff.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 0x578353be08038a1d011a4cf7dc42e1a170948e25bb2a8238c8491d163b4c5bf2. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZMEP2491296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d63dd41f3cdb67ba7ca807e2657c5aba116aabbd24ddeac46b233c1389c884. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:06Z), 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/QZNWV2447017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cf82bf9915b33f9268e231c7057cb84f3e08cbd3956dab86762a3af202d781. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:01:04Z), 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/QZTAW2466289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c115347029df8ed5299166f9825fd07d47ace26050070e574f2e3b5b5f515f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTAW2466292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3dacf014e7b1c866b22d4c6cf0ecef0052b02171486168c937f50f8e4385b0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB42472941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bdf108851bfaff72281e78156845cbedc1e353ae5866dfc892a34d44cd8082. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:04Z), 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/QZWFG2413478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b076846f7f28f69634ee07793bd95ea15dd26e66b8893d5dcb5133296c30c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZWFN2444816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d91a47cc47683610c90dc8e82137736ae2b446fc98fda9334bffa7a3d35a31. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZWFQ2473253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835404eae2aabc884343212f093d388aa944c6928f8a2f53b762b9e4472857a5. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:54Z), 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/QZWFS2462339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c43950497d3653f70179002832d0d66cdbf7736053197669c6c6817cdfe45. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2497378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c43950497d3653f70179002832d0d66cdbf7736053197669c6c6817cdfe45. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFT2497378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b076846f7f28f69634ee07793bd95ea15dd26e66b8893d5dcb5133296c30c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZWFN2444816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d25c96c800c34b3de9f08e8ea92a3c76a815984836defd1fd5172c7918f9ddb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB72412265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835404eae2aabc884343212f093d388aa944c6928f8a2f53b762b9e4472857a5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFS2462339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bdf108851bfaff72281e78156845cbedc1e353ae5866dfc892a34d44cd8082. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZWFG2413478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7095486d644eb35f0b6ba33f80a2b39cc0a43ae0734963185e0d3f63ba2f01. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:29:34Z), 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/QZZ7L2414587.