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 0x1c7728a19b51dae69dab9b43f06cc70b39a02626a603f8b2638b5576b345b567. 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/355756a1-7525-4b6a-9692-050a534a27c4.json and https://artists.proofprofile.net/proofs/artist/355756a1-7525-4b6a-9692-050a534a27c4.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 0x621f490af99c136b2dab8ee9b1fc08af2507639d1c6024e8ad4f04ebaeeaa80f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBKPL1785826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998df9411519f04a4555a7897b2a2e2c31d914ffa826c86396351c383996f9e8. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/GBKPL1802177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c47e4946c9660d73bc4478d416fcc2953a46b4d847e9362102e2d89b50f1f2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SEPQA1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee7e17c3a82590357ef502b0d355b90c78fcaa49f6895ce6d8a62e4fcfd91ab. 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/SEPQA2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40a583d216b6c0cb7e6df7c9b0f0103886cfe06c6c27dc2a634730e98168b00. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SEPQA2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033abe3b5e7655211a6d39f7bee227817441ef40995af1e3a0c176c43388398e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEPQA2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484f976ca738e2c522567d830da87e0bce9b34b14999d72552b82fcbee882a32. 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/SEPQA2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a3af53dad2c65cae74b4df579765545f68181909af2349b67b01b0f6389eec. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/SEPQA2000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93008fae6c5f3a03b94f39f911230220c8ea6afe0707769c8b036157fc8153d3. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:53:59Z), 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/SEPQA2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f991df961e6d4fd4bc8d01cd2888f967398952a00583f3cd6931eb810334b. 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/SEPQA2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc527d1d41e4a8df3d87c64f7473599ad5b8e9471b23cce2e43ccb8931d25a975. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:58:17Z), 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/QM4TW2472566.