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 0x155b53f48e592ce90c917ac03cfb405f386279a89a04809f2f11d37d71f20e64. 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/c35ea5c8-25be-4642-9749-42da5af16aad.json and https://artists.proofprofile.net/proofs/artist/c35ea5c8-25be-4642-9749-42da5af16aad.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 0xd8be3d5819d8f96fd2c16148c8926cabb6b88c05a39c46fd73a3e347b4557853. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM81769068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe85b4718af7fd00419e8764096ae05034365858aebb0010c79a8baa979cde. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM81769071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64376e687a6dd17d8ed390db07792392241f01e2b66fa889a6721ff75b6959b4. 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/USHM81769072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcaff1832ace7308411120de87ad6ec58623ca6aaeda23e4c1be878ef7d3f22. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81769073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c841d4f6e87b601fe01b6ba9a614e6a759792bdb7f6fe96fddc59ae6d334c8. 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/USHM81769074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05c81fbe79656b02edfeb5307f7a32f996813621cd6eb6c32b1a74151662711. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:35Z), 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/USHM21893311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d62acd81caec77499e36d34aeb16f1d86f2d4c71348d208de5b56b8f06261. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21893313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b3ab9f9e3c633de580c833af07654a5a8e65c47f027632f930d110b02cbba. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:00:45Z), 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/USHM21893315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410285c6a7acab7d4f48ec0ade352adc942194661308939ae6840c4ec84669e6. 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/USHM21893319.