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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 0xa778ef0ec041107a292c972194148c556716c63b5ffa96aeba778fb9e0bf5892. 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/96c53f9b-06b9-4811-8112-855b1e17fc55.json and https://artists.proofprofile.net/proofs/artist/96c53f9b-06b9-4811-8112-855b1e17fc55.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 0x477021145bc90cfccbc6ee1ae94924fc50547e897c15f5c6b32b72408b53ffef. 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/HUA632300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d6141ba3a8e614b3becf22f87dc4456300409189a7e709b701515ed3aa885. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HUA632200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97247b107753c24baded1b526dff690142c9d3cb22d02b51d4ad418a0a5292e. 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/HUA631200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a10819643f4a20f4dc722b8e3f2f16a6f20fe238c42e5d45d82e31282db9c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUA631200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb7f0806b4183a79bdc4bc2524c531bd85b711d4e9f72f423114812b4ee5d32. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/HUA631200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35c51e27432c8474d26882313c399365edd1b082351ee50ca85cd713fe27779. 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/HUA631200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd1bf127abebd43d7d9f88d23a328ffd1177020cfac3ea93f0e7e8af54d2ec8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/HUA631200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67896e36009101b32dbcebdd543ace94ccb081e04c019743d96648067caafa83. 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/HUA631200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803f62dceeb034218b11ddf143b54367af4f6598ccb0544d108fb1c2daf5e35. 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/HUA631200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2317221d6fbfd4bd6ebb4b6c0af4bb6982724b2949e76db0bb833743b0dc0ec1. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/HUA631200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f8040fce8d3f41c4aa77c7a35e2ddbf0501881257cda16117eea47e872eb4. 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/HUA631200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a45ad67cd9dea77ca9ec1f3bd44182a8468794ffd02815f3167224e2e98348. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/HUA631400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf385ea38ca65540210f395062f5b1a5d9e6f385a3471d0ead678b06c2906cc4b. 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/HUA631601225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2106d47f8455a68003add9117b73a9f1d39d131ce7fd82950381ffd2c2ffcc0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/HUA631601232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a35b5fffd84c0c5af6e27ebb3c10778687f3e09dfe165f2683896554beeb454. 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/HUA631700261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bcc521895843c07f1994236fc2af8065abf138917436f13450e7b5a27a46c4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/HUA631700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe716215e70618a9140df9845a6d0bfa4f48ea986b18bc3f9107deab1ddfe8f59. 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/HUA631700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65005963a7451207c80b286995e5a8403651f6dc1a023a0b8ef5a4c9a56576a6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA631700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a96bd69ca914f51799aec92595ea11e571bc71b620960782dbd1cc03fd6090. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/HUA631700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5f446ce0982873af19e10d9e8ff955fa2ff9ebc2f2d01c40753840801b4b38. 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/HUA631700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dca0ac7b30106ebec3cfcc9de6b748b555f1be4f75572824fa48f7d10abb08. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUA631700271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289790304278a58e81fad4dd253a7b539a8cfadbc8ef88808184ff625cd1d061. 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/HUA631800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246ffb4b76747a8a0fdb2f3b5829e98fe7f81a37edc646b7199958934ef3d33. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/HUA631800542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e368d96856f5cc107fa1682ab2a8b84787c8798257401644081422601be6b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/HUA631800543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16be9ed3a7842c61bd5258db1df063abccddbaacffbca9deba79c22c2f9ffa7c. 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/HUA631800546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a563de327fc728b0fe60dc3fdf4b9c61633213db39984af4522abb59e7f781. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HUA631800548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a04d0fd35f3219a5123cf6a312776e01e1a43a311a893a311ed8c66229cb02. 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/HUA631800549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7158055f8b3998044788b6db95e32a9001d37ffff6e3b8e35e5af0446d1d689. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/HUA632100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9749e55f05ffceb8e027c7c110f72ff20b7b1d84b10b855ad409209ef047914. 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/HUA632100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd4750077a171ed8c91b1027f59c6379121810415e8e5570d361d82a92cde4d. 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/HUA632100247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0046bb6277028fe67956460c450f2ff03a504398d8443bf3493cfebb4b60e24. 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/HUA632100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d160199ec3bdaa490f14d80ef1889f23a17ea24384ffe1fd53df876a76641c7. 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/HUA632400335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d9b9a632b2c08ae052f3285003c7cf235be23f531f33a0c49b73cb3807619e. 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/HUA632400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494a39c66a5462b916d6ff656bc4c39026c71373f8752a7c612646ba8d4e54a. 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/HUA632400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609a76350b987c27f512fad28dad60110ed4809c20729e52522329b1195dd05. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/HUA632400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffe50fb801cd6495364e1e9ae827cd8b9f5ad11dccef485bc7c673e9a1d9c32. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/HUA632400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c06a784c0d2959ecdb03598cbdb63d05747c4f51c09d6e61050832c5c94c9a4. 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/HUA632400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df50f5335bcf05af1e4cdb5c32e2a13c5f4737b7a8bb8fb9341f9da3371a00. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/HUA632400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e850ffc15966e5824cd0020e8096dc301002263c8fd53858b7f039a1797e3. 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/HUA632400344.