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 0x0940c4a611b78c0d32f9957046fac846b038c9a12bcbb25ee44642cf86bbe9b5. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93fe1278-574c-4600-b359-2759cfe0fc7f.json and https://artists.proofprofile.net/proofs/artist/93fe1278-574c-4600-b359-2759cfe0fc7f.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 0xf65397e355d1c40263848dc0e27e2e7882f00af52766c1d9bf1888e0f9ccaf82. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FIVOR1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc2f00ed6dbbb986ed63095fe1645f933135bb557bc62012bc475ebfc0e88cb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US94P1919302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee838ebc4b1bbc1b2fbd28a274dadba8c668563b42cb63d675033091e08d900. 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/US94P1919303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27049e39e4f881e5e0af26ea11506ae3ca304685636bc8d4094fd004b9f4e3c5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US94P1919304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b04ea81f3f9e387c853092e984f4cca596c013c425dd9a71b88eb70b02a7819. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US94P1919305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc7217ed642e67024221b8ab45e78870bd49d9b962c60a2a14b30dde982ed1b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US94P1919306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3201aa0e5f2058795f3e929ff490ce44d809e60ab00a0380931c0f9356857. 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/US94P1919307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94255f9a569f1ddc87dab9aa7a623f29a90c54370cc48f37f7e53c52708b876. 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/US94P1919309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d5b6377db45cc240bfd366295e83d598df927a9e54c5f96d2c130f59714b1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:43Z), 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/US94P1919310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717516a8e24f66af4934a37c994c4453691c88d85acb667cca7138936e23527d. 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/US94P2321601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf2da5b76cf63102c8de6175d069bd6b837ec23f81453d81d682cc0c94a09f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/US94P2321602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc582aaad9288d4231ea05d611e7ee82803e2e8f9157432f61b9043760fd62. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US94P2321603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c72e093365819454f08107ed258459d7ada43c4ed4cfa85eb265322c53d2ed8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US94P2321604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6787ea180e667e96f1d604b9e1f10afd0a4ad52f3e5c51334ee877f3f6bcd463. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/US94P2321605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db118b8907ddbd01c2b8b62d2fed45803218a0a34d1e68cf54e130d35670f89. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:58:21Z), 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/US94P2321606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627a416f3606b69575c8a974e3320d03e4dfdab5d5e72cc1fc0fab6b8d6cc206. 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/US94P2321609.