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 0x634f1309756cb3159bc53f7dd0b3518bb503cadeae7d388a8b8878ac49480b4b. 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/961dbe43-05d1-4658-b1e6-32e5d8fd8884.json and https://artists.proofprofile.net/proofs/artist/961dbe43-05d1-4658-b1e6-32e5d8fd8884.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 0x2ed7f3d91e065811a606199fb3f52000853355cf02266a5bb09f267f8cac674e. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZMHM2468177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13662fd942a249d90c1db492cdad1b6aa225e2e9a8a0dd595484908a120a403f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZS642433763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec9b326ed0217cbc5822f88c59827b78ea47dfa5dc49c33746127bd91a68892. 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/QZMHN2404579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4367417906f8c1b47da80fce88a1de14d488d82137c85ca1f574e556ada499. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZS652443113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378a9b374c69ae7550d6cab0d94c45253525a4ab7990287794b4280cf033ae68. 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/QZMHN2433193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4016b152251a54e9869021d220a85cf998172b2381f4c05541b6afccdc57e7c9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZS632414194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcdd88bc9815047e1e3f2a1144f52bdf68970bebe05dab988b64a1e051471f1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMHM2410996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf7f4ccd7c9f04c52cee2b979cc5639b1329716594df412abf34ff0c103f90. 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/QZMHN2484880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2129e8e8ceeb21fd99b4651b12fa9ca617250cc0840c174aeea854fefa1774ff. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZMHP2402139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ef8a69ad684caf98a0efe7648ccd7f356b14364e071b152c8fb7c7f4dc1aca. 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/QZS632487083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53c797ca5b191fb8d8c4d2a8bdbf30aa7c53d3d3bd0d1969fd4894e251b9fd8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZS632475742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e17695998d494411b775c6e32fb20f2a9045ed91eb9f67be9349adb08215df0. 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/QZMHL2439984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eedac82de3da13542a3ad5218cac7d21d22f1629724557a10cfc2a51ff329e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZS672421935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16485773fb5244b2fd01a92a60e764b8068f493b8d6ee0089aca6606f811c3c2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZMHL2431847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e40af7fa3818f905c8b1e98f53920d8db4faf4b3feea47e21af71a50b567149. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM42K2479870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b336e988117f3a897c53ce087ad2f86b91f22051d0e96bc41645efbad6c025. 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/QZMHN2418460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18eb45f04a955f13cdd8499596392f55d9c8ded09cb17301aa9cae54662285d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM42K2441498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bb99b8d3e51fc6606ac0f32a622145abc4fc8ca43ab5a0e7e9078f30fcb32. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZMHP2447093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfd4a0bdd6b95eae46de145c32a7148eb3a7524d4c6b14ad07e21c1f21ea104. 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/DEPI82441527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708eba71e1342381dcc8f29a436487b9b8dd1c419530cf0ef3a6cda3310178e1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEPI82441528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f92444fea3f18c6890f502c08ad4427edfe951ed447be45520667a81f39300. 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/DEPI82441529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eb164cc5fd16e4b136e49d73b4438122daaac66d1ccaf650cd03fa062c4a0c. 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/DEPI82441531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0747a48f2cab67ab605c27fa517c940cbff6780c3346bc2e2ae6bcc68908902b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEPI82441533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916bc2a7bc6df22addb1b81ea32a04f22d70bd51239262d4e94cabbdc3957cf8. 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/DEPI82458670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d257b35c681dd4c573f5dbfd70f0dc2e96d8d219ec791c6e1ee98b313eec6d6. 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/DEPI82458672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865f0724ce6f93db6a61ae7c2ff3a3842a9b4148084f101f74e25f6df75e3da7. 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/DEPI82458673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc033d6d3b457639cf431a1fa94e593e0ba1f6eea76a7260345c99d29787c89cd. 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/DEPI82458675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e685f7f57067c876bbfe6df195a27db06d3769a4eb7536a1ddc6c6a138464bc. 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/DEPI82503961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8114aa3f6dc5a88614d2539f633dd6f2acdec6ca320eca818fd2d01fb2e99f0. 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/DEPI82503962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44153104a826f48c524d6a226f4751e710ca2c302d097166935d7b843ec5dc2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82503963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55df90d010f07596cc91ec3542908e14faf00bb1a7d7bc0ba0a271202626cc. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEPI82503964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86448fcb7281a0207ca880aa07c886bdb56830884d626d80eb6b08e60e52ae1b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEPI82503965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7068d0d900959c3bf23b37f4a3f1c19de02c2817e4c0b562bb4b3a91b7fb6ed9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPI82503966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b389b9921db1a4e162c4113144ecfb84249afce93031468977b4d0367cb552. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEPI82503967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76918b5afc44dca68bf3eab5645b69310807407877ded3e1108666950e72441. 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/DEPI82503968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc859f97e80ff798d39a5bc81636a273bc3239347de49d39799e33c4943752b3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DEPI82503969.