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 0xd202b8fbca4a82eb7f6a9db3244db3230c67db969bc846d79406cb6e3ee06cde. 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/cf8998fd-38fd-403e-8680-5f334668ad59.json and https://artists.proofprofile.net/proofs/artist/cf8998fd-38fd-403e-8680-5f334668ad59.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 0xfc78184f9dfab1b7437aa840739fbb0c34c1bdf15d547fe89a4c1e05b3c2e488. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXZPZ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb912325f04a69539df43479fd3809142f4aa41874b4d4774ba5cb08528abaee6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXZPZ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a35a0d5396b3b4cbbc90da36dd9d51e260f5af3ae2ddbdc14df847c03afcfb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:22Z), 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/QZGWX2050167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51d32de1a17419b9f6394cea2ff2f08e90db1d66a87dae0d01948571bb9a9af. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BXZPZ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6f9a8ef95d3997c6dc00407b926f7b3786a29f518af2d179f344cfcd6c6fc5. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZPJ32119578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366da41385ee52ff87e08b92353e66acf694618e08a24c510343aba8041cc629. 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/QZPJ32117197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51d32de1a17419b9f6394cea2ff2f08e90db1d66a87dae0d01948571bb9a9af. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/BXZPZ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d247bb21d0279d751e689b9215130c637bbb043cf1993e3fcda09e82e74e3c0. 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/BXZPZ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e30a205994be005069c7cea0e282013389fba5512d89ba55319f7d82fbb11. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NLHR22400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7305712d3b56f23dd0677cf28dab072c42d84f6650ade6c29f92ced2f50d3ef2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXZPZ2400002.