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 0x70e88bdfac6fc4ecf174d315e4b3ea03c1240c834ed57b4e1a402c36ba0e0978. 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/d059bca0-e845-43e7-8e66-9ce473d89556.json and https://artists.proofprofile.net/proofs/artist/d059bca0-e845-43e7-8e66-9ce473d89556.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 0xfbe06ac6e7ec036cf011254b22658833619adc8ba4fe0edf5ca7d41b729381ad. 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/QZQAY2106483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cfe40a6e3c2cbaecf040d04f8226a4e09a3c955e3feffd29217b508e3ac0a7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:22Z), 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/QZQAY2127177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08aa03a6fbb36789bdd83b4be36ced2b0e5868e52bf360f834de7c800b702d4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:29Z), 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/QZQAY2115678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498b41dbc2d8481733206ab54f4f79e2192838374a52449143812deb40d2a405. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:39Z), 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/QZQAY2190324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9801794542b83d4565a1a9f608cb5aaec8e43855aefc7d864805b0eb4de3c5da. 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/QZQAY2154783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d22d32e6f867be8b1139cef380404fdd99123568750c5362a3c1b49366bf3b. 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/QZQAY2152939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266236110f236f4e36d292f19da66cb7a7ea5716af876f36f8c274e2b7de330b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:39:48Z), 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/QZQAY2178931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73f93a0af3f561ef6a69fe9dfc8338e034874558af2c08056be62ec19472023. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:07Z), 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/QZYFZ2452200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67f32c4a369aa76cdaa1c7c604aee76fbe6602d622f09b84b926fbf2d5e0fae. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:07Z), 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/QZYFZ2452201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74020d496cc37e271ca382cdd38fb0dbc8e0bd4c73391ac5844f755d98543d9c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZQAY2235035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db7cd2b3d2d8878d71f7cddba072038b8f7b077c165d4673b33600e82529f64. 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/QZQAY2219247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887afe50274dc44e7985adc7f098dbfc0d4caea508e1b408cd0f6c4bc36cab6a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:37Z), 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/QZQAY2271400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600e0c7cc09d9ee940df195b387da9af5a876e24e7cb610c6ab91380edfcccb5. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZQAY2229450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db7cd2b3d2d8878d71f7cddba072038b8f7b077c165d4673b33600e82529f64. 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/QZQAY2219247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9866203a47a57dde869f2cab0cf6709874b81862668afec0f7aa9139fbbf0c0. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZQAY2270332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6013993ab06bfd908921d0d85387db19d84dd577d906b1a63da848ddcbaf87. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTL92195282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6bcfbca99a85bf9886cc1ad986dbe5a6ceb541f126d2576a5cdb55e9656b7e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTL92125460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c055ab46d4e55567489ece54b3f3232e17c7089c20895ae9ce100dbd14b662. 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/QZMER2213348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa13a0de5f31fa5cd24b46c6e76b1c86c4c7ce8c88fdc061d9a2138a1fa22598. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZWDW2510267.