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 0xe6d920820e1bee5956668c332410816f34cb7f64c1daf249583ee02d0e17fd60. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9003ec3d-2d2d-446f-b946-8561f03af1a7.json and https://artists.proofprofile.net/proofs/artist/9003ec3d-2d2d-446f-b946-8561f03af1a7.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 0x4b254a176e05e91142cb88b5a293efb9d734f541f4dadd87a7631c6dd5218cc3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR6V82508628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5497de2492a3f21b15f3994d7d1bff19c8d56523824d9db44956ec1fba238. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR96X1631066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978675f74359fc741cf3d4ac43b286021d6d0def2bdbd6955bca203264550bf9. 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/FR96X1631067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a5feb39d3088503a227af6cb895edd73c3ee56b257acaa22ef114498215ae. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SMRUS0053519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cce226d2dde173bbbbb11d86392426ec9b2ded77730c47379a08ccaea05014. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X1887304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc212bcd857ad3bd6a698e99258b3824c45622c7285ef3269c2e661a6de26e8e4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA582102704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc60ec801e26cf88a103353cf412e20a0aae50ba3d8009c0443aea74b7a549a. 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/RUA582102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20f5cb123fdb5c5e9b1e6ac6e23956f50c4e75575b12594d8a34fb5760aa731. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FRX762093165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9390d10ec2a8fc35ca56271ed3a66763432f0f159b541d6e32c6c869159ce. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FRX762093166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc6645de9724fbffd68a3088797d9f103e9878fd67ba32e3547ab9ec9543221. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:59:30Z), 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/FRS182096334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3e03b89026275a245f9532765d9bf31ed3b35d8c120ca1f3c0e70eba6c2033. 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/FRS182096338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69541a14035dcaabd139fad2ea930ea9823b47d8a840cd53867b52eb93ba3ad9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTV32251019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448f628ba67cdd3efb03e15d614e1304f54314423121af19ce00b5931bdce97. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX282359806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf517f501296d34f3bb1f34278bb3c3b237d224eefb18b53e5642d0567930bb8. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FRX762546205.