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 0x25b6d3cb30692e65dae228446bd828e54b5ef0718aace46104fc114cf3d701e3. 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/45c0c07f-20d1-416f-af6e-8552961e396e.json and https://artists.proofprofile.net/proofs/artist/45c0c07f-20d1-416f-af6e-8552961e396e.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 0x993f572e3c2d3f46286a4619ba3ec597bbb27033dfe2106c2438efb9649a1778. 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/USQX92305772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0adfcdb67e0c63d3f624c5bd59edc855bf7a4d847dc9f2740135f1bf440d7b. 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/QZNMZ2308485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2536c07cfeb5b71bbc1f2d2e45bace585e574a859481984db158a16107007aa3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USQX92305965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3abd0cf03742b03eb033e2199ffb8bb4c564833dd4589f48cd72c1e80cada7f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USQX92306555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2095b0e39dfc914431c3816bfaa33c68725be0aa9cf5c5078c4a35a869dc47e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USQX92306534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d11a1ef1371ee03273c96a8efedaace92961f178d1aa4127180eb29355392. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USQX92307299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4ca809e8243f0d22a24158617143726487011fda586024f1d0300c0a16d44c. 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/USQX92400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4ca809e8243f0d22a24158617143726487011fda586024f1d0300c0a16d44c. 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/USQX92400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363d2f497844a1a33f49eec06ebcb9aa9b9a2c58823f6b8852e27983ed46ee41. 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/USQX92400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2536c07cfeb5b71bbc1f2d2e45bace585e574a859481984db158a16107007aa3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USQX92305965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e8e4d7e067edeb44e8bec6baa418b86db7edbc3a1cc630f2c4f5c0ff4ab24a. 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/USQX92400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc691151c9e825221cbb92cd643ac44ea0e5cef5c390e0191236cadfa3990f08. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USQX92400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08345c7ef7d8561240daa7caf25f7d3108fec96f8bced43bd301880e400746. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USQX92400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645b58432afebb37e64945740376c163d51af5797d7606fa507b4b7c337d8d2b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USQX92400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a20d51c4e1dfecb17b909a07f37b82ae333a251475da30a0380b0c544088fd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ESA122467244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78d4f8e25ca2079afa8b453301e49192042538ed37fd4ba77b89f945e172e4. 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/USQX92502968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663127eb13183c8558c4dabd17079644d463767b053be605b00b8399b322bbba. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USQX92502969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1c6f750655180a10b88c9b79778d000ac72cd0c1b664092f34c2acaae731f9. 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/USQX92502970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4c454ad654f40803a268a974860b2fba7ae18229a585cd45f170ad48f0f952. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USQX92502971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fa962ac0209f70d6690017c6fe2fa0f9a4e8c669da62e075216a3f28dd27ef. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USQX92502972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018dd1ba8f537619d482faa68566a9937cd3d93cc42bf9d6fcb202ba7617eba0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:32:41Z), 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/USQX92502973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108bff20fe6cceb2e3a93d748e3068663e5ee44102927961475285860ba3391c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:22:12Z), 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/USQX92502974.