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 0xf036a4e304ec25eb5b591e54e07a5cac1673061ebe8521052376ca6c5cc1212b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d481c9c7-c329-4d6d-ba5c-1310b6b05879.json and https://artists.proofprofile.net/proofs/artist/d481c9c7-c329-4d6d-ba5c-1310b6b05879.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 0xb2d3bead731a4c016f3d02d6c55adfb29c7f5a733ad599d9a5f30e8229e03228. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62553716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9d32709b6b13418ecd55b523d05ae7ad9e691e32f4eb239eefe88665a405ed. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTB62553717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6907a77c81b59dafbb2fa091b20f51b0bd8c0a42a4c72a14771ab877a50a95. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB62553718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a730be85d6705cae725b412ef4096b9b866cf01a521eb05bb9bc1a1d9f7ace. 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/QZTB62553719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6670518648e15647d3b3feaf865aa0b7c467d60422531891b344cbbbecd9e4ce. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB62553720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952233d3970b6da874a3afdcf23543645da74c9d73d5967c49efa45f7cae5467. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB62553721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7c4e43d1de03a0638b8a66ed66273e4e379ecc8ae1bf78d281afdbd606a113. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB62553722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a96cc8ec239f7b4a08cb56e477891e91b2b30dc278f537bd3fd9e64b90fa796. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:24:43Z), 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/QZTB62553723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2605790824f1808bf861dc4292ba6a2ac46cd65738f045f9e747ca288fe3dc0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB62553724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471d44a386fb63d629ec8e70c3a3deb8a8a4891edadf8571ca0e1d115ff8260. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62553725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c90fd826386498d38346c544b275356f2af946bc82854d6a45b85423705c1. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZTB62553726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4652f5d121dc0eec31147a92189bb0c0d385c29f581bc4b9e2b138cf5b10d8d2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB62553727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fdbf7fd017399788fcf0173348f5012bbe2d7619139b4b05e090afc90c1ba1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB62553728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6a56972f8715ce98a0da74a81660cdafdafd99a69da797e41befe529216d9c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTB62553729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8bd85e47b7da7f68f06489d58912e6f3a516f59df7cf7d9c25588f16a38ef2. 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/QZTB62553730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dcb1d12889d9a606ce5747a365c50f82ac2a2b2cacb841cef9ca485e59cf71. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTB62553731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a40f878bf947deed06605a476849d10f6881bb6655139a9d70c4427ae31eec. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB62553732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84a2e28054c7acc5836833247aa21ba0906e300e3861fa74019132c53868823. 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/QZTB62553733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5688070c6974ea02613840fef70d09e0842558f3c1e858ccb8e2dca2f03ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB62553734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987792e07aa1656ba6fcbce86d5fb0783bf4cb3ebdd35738856f9e7db59b2abe. 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/QZTB62553735.