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 0x98f8d4519ce2836db1c295990be9ddb4ae5ed703996df5a79e46a2301060804a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05578dd3-0860-43a4-9447-1c8248c4ce4c.json and https://artists.proofprofile.net/proofs/artist/05578dd3-0860-43a4-9447-1c8248c4ce4c.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 0xc6841631d817f4bc4e54a92a568fcb1de1b56f46d431a5112fce823e31c218f2. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZWDE2434062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f6f50dadeb71d3f27d90c9aa6c57f1d00cf0c7776c5743cf654e4d6556e4ef. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:01Z), 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/QZZEB2455754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799b18049cef92a0560db7cc3dd14eda673a502ad32602f56727a79119c2e9fd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTRX2505946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18a7e4954103ee799504fbe362c00fbae8bc1570b9d51bf5f80e4a321134f61. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWDE2535296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a83359c356cfdc998e328edfe64bd9679ab28762e906d128e84e17248011b3c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDE2535298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560b2a3390bae37b01c47a001825df9ba40b092da3de2f2497094850ca78ea0a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:58:06Z), 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/QZWDD2581190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3325aa43a0bd0b8ab4a44f971a21e25c527abc291fa8fdd052cd59b5127423a3. 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/QZWDE2535299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2131b49ca3e7d212dbf90eca8a95bc48c6568706715cd76d8a72da1771d8f089. 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/QZWDE2535302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893e55bc2917500c59200dc8bb96a2812ee00f93747bfc16d429741288b3cb6. 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/QZWDE2535304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd159a4512a2c14514580d0f10441d014999feebad41ede22a45c9662f1a5e8f6. 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/QZWDE2535305.