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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc57859c0e3d39cb4d195141cf8df5815d63fce3d4c6c482c2d1f0e7623f663e. 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/24a42d3b-0f80-435c-bc2d-35baeb7661ec.json and https://artists.proofprofile.net/proofs/artist/24a42d3b-0f80-435c-bc2d-35baeb7661ec.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec0ae4b950b0c1c33318013c5622fd4cd3639078b219d9684003e6f8c095bc5. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US3TS0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc13f5fb84e348041bd22b6f6ae69d205784382255f0786cc8717f9da9e2df3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3TS0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b23352bc3a1c4d05dd38ce388985f6e6b2491aefaaa83ca48d264b7ec53ad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3TS0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39444bcd5445ec9c69578edc0096735f0df6103654bc4792f33d306b3b5a15. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3TS0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd501adf5220ccdd244b9dc58ab96e3e71067fb9c1dd3ec4df801cd9d3f2e80b1. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/US3TS0900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775039ed640c5503441c48bddaeb2eb0640ccc85add3da46d7a2200a8ff488e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3TS0900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1a02812786d6f0da45bb26ef48aef776a325cabdeaff7ece3fa60a3494d0c8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US3TS0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8333abece3e6781bef129b32a96953f903bda5a980b684d7cdce3e4ae673ef. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US3TS0900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b42f8df9074f09719bf0cb70c6ea15fae5d385e7fc9c0a41c4d205a5c8010cf. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US3TS0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b85844b2f9cfb97cfdfad29c63ad4db1d123b6ba62f1c5443c008f5a80b416c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3TS0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff2ceb48cf1fe863685d448e8fcbe77ca7b43f5a2dadffda1ae417c4efbfafe. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/US3TS0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07236d4687cbf27b45b001e769240ab51284efb5b1f11571fffffff153b0a5af. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US3TS0900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752dfaf3d46143621cbb251e8ab4d1b0939882da3f1cefa316c2d004ab3716df. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US3TS0900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58c8681d626b3f2ab5cfc8bf3407dba1e5b9b1941b8aeaf2f1da7509a6e0664. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/US3TS0900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19cf41f03bfb9b4cf2d5ccfbfc74161ce2bf2258639c1dfbedf0067f5a48875. 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/US3TS0900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71065e2b56c242a83e4b697f5bcf8454863525bd827560a62c12772bbb6043a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:53Z), 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/US3TS0900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad1fe14930a1e6bdcf6139de2ba9cb01fd4f34edbc31db40c4f53aa5a558dfc. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:54:13Z), 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/US3TS0900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910d789200eb57038f78b37d34e263d6e7e8f26998db0c8aefed8452a863d0e. 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/US3TS0900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8223b0034d2e5c86794240f78be59d2823d98cba70422c3dd31a7da3b51f1. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/US3TS0900145.