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 0x5faad4431749a7e43a6a3534a6ad72082baacd0ea8cb19db5e3b860d1f14fb78. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c52802bc-fd48-4be1-989e-8748355cbf60.json and https://artists.proofprofile.net/proofs/artist/c52802bc-fd48-4be1-989e-8748355cbf60.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 0x5618d8c62b5082c2f9dbea315daca42c06a05b59b10d309c21771444e8ed82d7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:18:55Z), 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/QZHNC2419986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0373f19e02be88d50330b0ad0aa0e6dbee90e182241817d0ff0da6419a7b891. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHNC2419988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e8b33bb5a09aa80585759681de87d2d6b7a0c97c9171c12c85af72972b9732. 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/QZHNC2419989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97f62519cf32be86e9d3da66c2c8055b544be15dd8ea874d5ad8cdac2c71d8c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHNC2419991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5577a8684dd71b54b1120847c98329f4956c346c27c9af236f266bab6b2f54. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNC2419992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac743bfe778a02ba83dcfd63204e9b228599eefd523ec8eb148de5f7d3586fb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:15:58Z), 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/QZHNC2419993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca19f169e8e9a4d4e7f96c1f9183ed6b216a84bed4f774e2ccd3b022cd0212. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNC2419994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95494ef826ca646cd89bc23ac2ca38395a54f549e5c18e255a11318567882463. 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/QZHNC2419995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94eebd07fa38978ebe0d924aec9c136fe7460065e8b916f41dc4663ed8292c8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:36Z), 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/QZHNC2419996.