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 0x1172072e13acb5ad046ac284bf2d4cb3c0af546ac752e759b961b48e0051e6c6. 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/d1f3db50-c21d-4e54-bb03-181dffbab196.json and https://artists.proofprofile.net/proofs/artist/d1f3db50-c21d-4e54-bb03-181dffbab196.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 0xe7ad993551e4e7c1404515cc4891761ca1970ee746eb3534de5fe0a2d3a12180. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZNWY2372787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a01408b04c5702fc93fa523d994ae458842f9791d2c075289e1ed0e47a5302. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:11:23Z), 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/QZTBC2358308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b9f29d1133da9d3733a77eedabae6a28df82452907c361ac406ed079df7f8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFH2362184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a2f71753c8a7df2aa33caab46c434af2b7f668768b28004cc63571ca7ac19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN2400549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d67bf82b07f061dc4902c1abf74563a52e46bcda9d88ae22e6e219384730b9. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZ5FN2438910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa856fdd947b0fa003658ca64d15f832aabe8cfddd965c7a663fa234467a913ce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN2438896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55fca9ae70536ad832cc27efc616787bd13a3f5257b5bfcb9f22485d478441d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBWUL2488066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3f6229ea057e12494302b830c3a84365ea1f7e8cb553aead1986ff11e46ef1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:00:20Z), 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/QZTRX2453725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610304fd27903c611df73cd7bd5838c2293c18e2372fa1873b314cb647dcec63. 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/QZZ8B2453156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d5634f168a86391e717a8ebd5af2453b299c4be8e3bdbdcbdb824fa64cc79. 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/QZZ8B2453174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60580d8835e6a968e5bdbcfc78ff8dd034f548f58d62bb473d918ab095becc2c. 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/QZYHM2503070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257903bd772ccd4977d3ee183632f9a20b36fe3c0181a2ab8f4de558d93ac1d5. 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/QZYHM2503600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11035f217a5a56e3f0db5fe95c68c7fbc43e1166930b1f9acb4efdb4c1ae9662. 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/QZYHM2504901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab9bce1b372876e86d6ed0ccc392b231a88dcf865b0404b57e8a419b149f98b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZYHM2505703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff6f878f01f224985e7dcc30c998b553af42f56fad51c3303902ea7d999f7f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPLR2203724.