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 0x2e18cf96fb83bb331928e670c4596035008166b7e4bbd36cbcfb4d7686f4e15e. 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/2da7f44a-2a6d-4f57-bec9-94f0b0d5d50d.json and https://artists.proofprofile.net/proofs/artist/2da7f44a-2a6d-4f57-bec9-94f0b0d5d50d.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 0xd9af645c3cb1ddaa9a57ac79fc979b4744054867dbd80d8fbcf3d372cb69cc0b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/PLI366286120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6601fe73ceff0dfc559552fdee097e08908df7751f5c8efe031534acc74f23d. 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/PLI362875590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0660155b22d99c4a2a34341a870af49b6cde3c8e7c4adae0a690f84a8005377. 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/PLI368868620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb160f454a6a3ec4a21a3678f20a7cbd59f9b09ba3ed30ee496c1f6ac35992911. 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/PLI360478990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98ea41027e1107c1c002539dbabd92ac0100a44ea202a35e79d4961a7530790. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLI369456170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044fdda9d618e3783026b05a17f7ca41d4cf23539cab33094f00fd1da464cfce. 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/PLI369456180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693a9c94b476d8368138f6bcdeb9221c48460dbc9a0dfc412699ea8382810901. 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/PLI369456190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248ef8acf4bb4e88e69f072885b2833aed3840297a6f651b6e53a702b9ccbef3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLI369456200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c9a260a8b5e7c045964411ef2b2b11794b85e789b43f62344e3f92f77fc412. 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/PLI369456220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1801b61341c202ff25617eaa1a25820aed359b27aa5b33685bcfa32ddda2147. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLI369456230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94db8f3495aab80347ed040ca05868f98479460fbbafaa55160f5130165b58d. 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/PLI367519100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19b6188c88fd81e7d3bb6c480062a7ebc66fe5a5de0366b1091432ef6f0ff4c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLI366936600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01891a4b4f99a8cac38d560532a9ba65576257c38807b2cdd7f6c79e13e52daa. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:45Z), 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/PLI362529350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26205517bd179a5d5a8aa56dad2d0b8d0cec6e839858374caf8134c89684e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLI362529340.