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 0x5e8a7bb14e8abf9752e6e25790b0ff9737f5b4b2453ded03fbb97e88a9008c52. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df5624ed-953b-4bdf-b4bb-1cc33c395b41.json and https://artists.proofprofile.net/proofs/artist/df5624ed-953b-4bdf-b4bb-1cc33c395b41.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 0x42dac00a816c0ea1f1d61786a2f45c90d27fbfdd1bab01d3d7ef1e157c73d328. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPJ32214540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8577772abd6037fdb9404a22323e79d0990d7550aff98d590da75292ee06ebc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPJ32218697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fdfae473a98ff0960d16dcc21bead8ee0bad6d9fec508c211763f9aa7f527b. 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/QZPJ32218698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db80ca310afcf1c2f0a6cbbaabdad10185ecf2584a83cfdf443566027b726b9. 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/QZPJ32218699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f69e24b2c91c3f1bad88d12135cbd2b35be7a1057831f20e1d39528413859c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPJ32282206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42bc0ff3fffcefbf04ca800e34368b7861f1e85def134cfbbf5b018043ebcd. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:47:29Z), 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/QZPJ32324170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a470fd804871c0bb72d49f5dd859a6128eb5465f2e7852abf14d0792c06f4a. 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/DGA0P2477733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb41ed0688855525708636f6b39aac03cb595f2e615ee8769d96e9e155cdd9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:21Z), 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/DGA0P2477734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e22846af40e8adf82adf846dd152a9bf1829caea67378b25eb025d266169a08. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA0P2477736.