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 0x54fec749d7dbc43d9d7cc039291a072d2b41152af2a669c9f15e90ed8cdc6a4e. 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/d1876136-8f51-41a4-86c8-f9d6737a5dd8.json and https://artists.proofprofile.net/proofs/artist/d1876136-8f51-41a4-86c8-f9d6737a5dd8.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 0x0da27079c55117f999be315d42cce705341cab6dbb2260c4a2dceb73e5b3a127. 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/QZES82072645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e6b76da3c631e92a1550ee8da1038f12d7489c25d9da979b61883dcd8d28cc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES92004017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe01749b6a9908e04e5b38fd4175dcf67538b9fdbc5119e23e1295d85617894f. 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/QZHN42053499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aa4f14e22564dcf408ed2ca7b7119d9a92e68a60b3bd606587513a31d583ed. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHN42053500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4ca72a9f9fcade86cb5ec7ea2df4aba1d51be03d9949cbc0fe3b5e4170f8a1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN42053501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324379e1c5d90c96c2af6949b15363fe7e566df13f8130c30089e7edbdd3d440. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:02:27Z), 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/QZHN42053503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb650f4a62614915121bbef101166bf16da3fdcee7043631f42180c16db276a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN42053505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b58b6c67149750b389b385a5121fd7df3310002878730dfbc8d99f2fdb4be8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN42053507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3533b2b2f9209fd182e6a052335891d8b31fb9669ddfec232336ddc631a30ec9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNA2081762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc85e7ac0712033f0ec730e095ee12aef3974789823e9c3d59dca4b372b877. 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/QZK6P2009172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498d84761bc2fa0f56a40c0e155b1999fef5a912ea56bd7730dad95519e339b0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:46Z), 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/QZK6J2094154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b307812d43d1561d09fd5414a264d5290113e7a6f9eb2cb8d5584a406b56c4f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWT2057115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deaf0094400763deeb83df7404462d49ba2bdeb3c09b48a64e49a6f7a0775c3. 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/QZES92120672.