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 0x76f10ada3b8c77342e7482fe10c8504d15e6d3045094ba955c4d8526cb914ad1. 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/426356c7-c63a-4a54-879a-cf9e857a64fe.json and https://artists.proofprofile.net/proofs/artist/426356c7-c63a-4a54-879a-cf9e857a64fe.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 0x0b624dd5ff29424a9b0268856945391c98a8bc2d5b9a91d1ec4df0b8ebc2aef1. 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/US3441001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7367a838cca89702ded8c106e900b4879cbbd811b3239567603a96bcf99e4f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US3441001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123599d9c292016f6949635639fa1b8e6a7c98a8cfe190c3ef243e8a5c4369a8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3441001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e627c5e25f3052b0a1b0b8b11262d6969db6e5ea4f3108b5928d83dda71bd6d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US3441001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc186619ad509575e6c0bf27942ec359e3e18aeeec81b76177735a8d8e02f04. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US3441001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf00f657a438ff0024a30b457a226dda7a329dff2382b51537fc3efa5fb93599. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/US3441001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f9a64e2540fd6747ee9c4014705f379a1b55046d0ebaeed05c5202cbce5a78. 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/US3441001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ddb80254b0ffda3a707dcd424337b381c27e36535aae854610502cfa41f34b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US3441001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6c625d8eb80dc6a7c572e3a7e7b15837ef60ed214970fde8327982da2796c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US3441202601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8012c2f7be236888ebab1139f591bc7ae2ae3ea48c551597c788bc246bcea69. 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/US3441202602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ccf193e5cf22f6360701e77907aba6533d419d4454bb0481d5e35a1030d8ca. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US3441202604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1546989def48f000f7808e8461f86dad1744a68bc950fa5aee143012c949e08. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US3441202605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd003d93eade257cffd1442f71dd08b72d4d4f1c79c7e69bc740b7d5dc6a92d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US3441202608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63aa52edaabaa93274aa7549912d78ae7ed7035e2b6ffea3dbe26dd84666393. 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/US3441202609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652574b530940de20ebb402056bd6284d3d12aaf09af092600409a792aa01692. 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/US3441403901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb30db1538c4cdc02cb914ad245a47aa979f8149cebfe9237fe47a1f0608162. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/US3441403902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dea2890a00859582853642cf9559b33eb6c6f5b6d0ea56c2b26bf0f2270f57. 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/US3441403906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0c5d99b3bfdd342df07bac777b88444efd09e8a790845830be9ef68ef2571b. 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/TCACM1602077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde500c522d68b6b1f592451a9c3cdf722e03c13be3ef60fc0ac6e193da3444f. 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/TCACM1602081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c8fa59f2686469571285df67ca3da1c284c2fd4fce4dbf3401a48485f14f77. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCACM1602084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18352a0befc243c6660582324488dbfac1f71f18217bec133b551a435ff6e5d6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAFF2011085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cadc69548103372b52252c106575ae5c0685b7cf41d10ccffaa1cd1d40693d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAFX2136707.