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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de6e179b98a5cfa7061af65671eeaf3b3e936c556095b1dc889b8ec245cb52b. 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/f4fe0e62-dcc7-4495-9e07-e36c530f51d0.json and https://artists.proofprofile.net/proofs/artist/f4fe0e62-dcc7-4495-9e07-e36c530f51d0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b3cdb5840f8e529bf90ffbb958015292aa778c865bbdce25c2d076f025992. 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/USA2Z0910333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9eceeefbf0e13f93908e98a363e85353e6f13a193870e67ab7119303f921e9. 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/USA2Z0910334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb55d0261e84c2237940ab5ea1745019dd1480585b95ed03bef620486e1cff. 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/USA2Z0910337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195bcc1be0203a6b9ce330e87a33bca72365af3194acd4d725a24880e76f451f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2Z0910340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60b1198587ff756d2424e9efcc7f57d5df9d22ec94344acec2cf94ade4d1680. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:34Z), 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/USA2Z0910341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef48d8710bb028f39773755ed8f4a64adb3d4858edffe7b54c70a05541d417. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:21:11Z), 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/USA2Z0910342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d407e248045f147c85e94bd02c863c1bdc163e79580de17fab326cbcd5d8b2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USA2Z0910343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf549ffca2f58e41ebdbbc112dedbfc9c65e0d4c6c2bccb0c7fff3b55a3698f58. 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/QZWFW2509587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf843a6de505925c3da0cfcc96569544b30f7fe9c37e85266c055bbf95c1a8a9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFW2509588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb696768d0e61c3b4f5b1cda45a735e544ce49edb6d7d43b38be93e15464df8. 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/QZWFW2509591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd2ed946014ff026660499712dc1b5b8610eea4c861c41e88fb5e36d808a5a. 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/QZWFW2509592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d93942c23decf81b90204d9cca8ce2424aa350a05beed753b4dc91cee56e2b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZWFW2509593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df717afb0edad468e39f8dffec26e2b981cad61114bc206514ac3cbedf599a9. 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/QZWFW2506013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ee46e7a728d48789cf1dbc19cf30ebd4f7ad5b1019e8bbfab45795b400df64. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFW2506016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b089a4d3ec178d103a674a0b55cbe84c896b41fb2c7f41ea5bb81c69ec14b0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFW2506018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07880f7c7a92322bcca4ba91e6762e9ee39d15db65363320a6fe781f934dc78d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZWFW2506020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690f28db083d6ca29088ebf98cdd651b922dbeb7786502a12dc859df64d525a2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFW2506021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755791c667700ed8c84aaf463f06be010c080b068a34d49e65b1316af597f20b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFW2506022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e3d10bb185f84a2c7dcd724b172291462f39710c8caf245e9b90f6a413fc6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFW2506023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9136cac56f2c94f4c4e5d45afa4aa7740e4e99ab1318de20bdf559d3f6fef4f0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USA2Z0910388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cb3cd3a0c7e7a603cbcd8671cac385bd15621453244bf4812b2f3e48ec0190. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USA2Z0910391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe778f3b4749e69bfec48538739a2cc6e1ea5ef100d5f124245db615fd570a9d3. 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/USA2Z0910393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a569e0a4223c7e12718353d59342f46e4fc3cc52527fabf08dcd57fd4c1124. 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/USA2Z0910395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ebc02b9a47cdd276bb73ca8b806d9080e33365705d4ed2cd9ae8b3792c40f. 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/USA2Z0910396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9c48f207be21c1c1dd861b79b7cb276d70f1477d1da9a6980d2f3a65d2007f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2Z0910397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f55b08513b71024f898380def1e9eb868cf4bb49ba660eb5f9cf6d0a9e0b57. 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/USA2Z0910398.