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 0x2af685a21389bb4eb060177791985f409b5d3b8dd114a608835029c93ab31a19. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ebcf139-d3c7-4e68-914e-27ade4ba34c8.json and https://artists.proofprofile.net/proofs/artist/4ebcf139-d3c7-4e68-914e-27ade4ba34c8.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 0x6c5bab7f21ca9c41ff5c9f56cc547e81923d2e82c376e734e841f1e160041e34. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USL4Q1700751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaea07e9b539169375f5134add5f07eb9b5727e4a4752a137746ff3c1b2f5d8e. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/COC011430127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495ca8e25a6ca26f8ee0487d398d6e552bdddb4d5a3c5e69d91c4ac4481882e2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USCGH1624472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbe3f8eb3cceab74914c8ef7ed43b5a50f1a51dcf2d3998574cfd57f76fd2df. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH1624463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bbddfcdeaa9698a0bc781a1823f1a8ee975d4f955069213baf66a92898bb75. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZGLS2468226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2569df09cb29064d569504b3ec358c7d26373df7233b9457c7fa43e715af495e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2546500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a036eeded7e55f8d242f1df55c3ef2df6b28b8eb072a1e01b719766bc66b3a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2579402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c9da5d7bacff4e4a6af2507dfa58c8031d2e398fbaca56e81d2ba4f81db689. 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/QZMZ92497828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c9da5d7bacff4e4a6af2507dfa58c8031d2e398fbaca56e81d2ba4f81db689. 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/QZMZ92497828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70bc5b703211c21708df0616c7040e09587d3e0238f9a1f11abe25c3f82c64c. 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/US7VG1721414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305504a81cf83bdeab3eac8ef9b910e20a006b7bf345a159208e3ee3309e06c6. 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/QZTRX2428239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2e01f1ba74cd2b44d7a3a3433c389b8a353f5a7bd9b79f3273eff728865b38. 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/QZTRX2428249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241beb04744f93c615335475dc9af7bf2465b5ebac163e0a4dbd3609668fff1b. 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/QZTRX2428463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923fe75f87bf0b486f7929e468683e41930a9ab2bb225413959963a251e71f9d. 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/QZTRX2428471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05194a0b7ad2050da65b5757bd5ca0b9b9728007749185d63db92fb27031b06e. 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/QZTRX2428520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ef6544e039f9fa7d12a7d8615a3d8943ecfda502d582ae3cc90e8ca1adccf. 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/QZTRX2428613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e352a26a0d0c3e2bcde5347d817deaea2b9b19ee977aad6e8e4f675d2588382. 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/QZTRX2428620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe230e80be2766d36044c5850728bac5da4e1607dd7a7d2bd8698b907a8093c5d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTRX2428143.
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 0x7d0da50087364641319a8b88caac8e119fc825659022ce6fa8f990b069a8ada9. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZTRX2428453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66ae87dfac45e003755e6452ad918c23157c5e7b4e3420ede9d8d850adba6cb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTRX2428587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa54334bf289b55ed8b651edbfa284aedcffb72ef75d8ebbb5aa06bf02f780. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZTRX2428516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdabe76f279ff9a5d179680922866c7f7a05fdbc7db572a532c2e0b0bcb7869a. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZTRX2428625.