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 0x6c49b04ed2edf8752df148f85711981c062579f68f01a08e300957c3fb31f592. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f31187bb-fa7b-4d2f-9f8b-6531ec0bd278.json and https://artists.proofprofile.net/proofs/artist/f31187bb-fa7b-4d2f-9f8b-6531ec0bd278.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 0x9dd27620a61c7462f4d87cb1e67097d08c84ed741a7be300d1aecee372916c48. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/ATUM72300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10a419bd43544ee8c75348d1a03907f5c03820d6e4909e0b2fe3cccdc5dd107. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATUM72300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785b99dc01c2c8d6e9ba47b4daf14b1765f8b5ce708ad485b23c007acefddb3e. 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/ATUM72300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d309a69a1c8b30a0fd4c2e729b88dd47a212b47be7ac760fbe3039d4cd1ee5f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATUM72300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344b4c3ee8e39e485bd9812619bf0945674973091fe4308ce0b727cbb89f7e0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ATUM72300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb81f15b9628ab7f05f782333c2a35b32981ca20a33b095080207a5934369a1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATUM72300577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cabc3e6e0855e41b5fea735dfd7da82043ed2527ad97d512497edc4810edd5c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62378241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e07c3e1e605917816505c1c61b47597ccd701b8410f3346161bc0743486a9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ATUM72300578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3f06971ea6d62159218a65f13c253b7432100dd07733c9057ce8d075494435. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATUM72300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd320b8400baef60565a1002f6f73e5f307e604164816bc4e1a9407ff15cea85. 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/ATUM72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829e09749d409d89a63b6b6ac970fd06178db37db5f76b7e01e3de1011a0074. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/ATUM72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43211e557736941bc15489bdb1a6ac0d23f06151834314e040dd1cd267d42fe. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ATUM72400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b618cb42d3b1ec2bf1bd1b589a60ef44ee55fdcf0205cd024ba67296ad8475b. 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/ATUM72400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de3c92393b051806e99946c9075d9e63b6f609805d44555f3ac0432529cde1. 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/ATJJ52400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88c6d42a73f5b86642d634f7505e2a1a07d43cc7d7852c6f8666d007dfe7f13. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:45Z), 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/USANG2493747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78a35a473320d862ab516eb1b975eee3597b2d0cf6e9c25bfddfeace02bc11. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USANG2493751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c77f4ac09ea8689dbb9a9bb2b49a0e1fdad0987e4f1b2b094709af187ae64. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZPLR2569626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872d683cbd006c4f52c3f96c8ecdd9cf38103b0b63eb5c61d96685fd27a0007b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATJJ52500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed679427434a32e640b4d9680f5099ab4db5a7fe46605cabf3bb45f6a402b174. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:59Z), 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/ATJJ52500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb88d0c196256b1840b8fcd4aacee406ae2437769c70c7a73e66978f24d285ae. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:43:18Z), 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/ATJJ52500081.