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 0x609e6f7be1eb592bfd3bbb677a1f6317b9ddcc3927e3f9d7af337ce7b76fba89. 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/7b5ede13-14e9-4b49-8539-37095fcb02b0.json and https://artists.proofprofile.net/proofs/artist/7b5ede13-14e9-4b49-8539-37095fcb02b0.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 0x9802209d008706dd396d7358177d297f9723c2799a1b5901375ab02b9311c64f. 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/SE5752409250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb9703134bdfb4837a5427f221435eebaca3f8ea2076a1fd1791171aa385dab. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:40Z), 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/SE5752409256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975319675b4e360b91ee7442eb0c7dfcf5f72f933895283bee8991ca6ee4111. 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/NL9KQ2442628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a13075d614f1bfecba5055e1b58b0121febbbb9d30b58725b64a33ad6cddd. 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/NL9KQ2442630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe87669c3c3e588c7956290a4839a5cf9991663a7e98ebf1545bf0d29e0a440e. 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/NL9KQ2442632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ff4b1b251b7af5c1d903c4661a338c60f2fed931534f5c75f4dfdb1047990. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:26Z), 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/SE6XW2419782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5be095992415ffaed39d5d960845da5b1c12fc71e9757db971a385c9ba821ed. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE6XW2419783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa78b77806f9cc8ea9ba01d660b7c68a9cc51265ebe3fc25f0d1059d97c1858. 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/SE6XW2419784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd237939eea89735b1ab96abd4c6faa95fc7afc2c36d7035b59e759a5f507b. 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/SE6XW2419785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17e4dd03f06425efec34802e6b04f84769cc1249b5e5f60f914e43c37066339. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SE6XW2419787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59d11759b07a6ae329d276288c0fb2d95573e57105d2ffcee2c01015cd576f6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:21Z), 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/SE6XW2419789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbedd84e721b44af841d76561e9d9a9d3680757ad5f19f6ffb3b4c3faa6077a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:08:58Z), 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/SE5BU2528083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac549309ce476488a3e762b1aa1ce9fe84b287a905d181d5002c011cc72d319. 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/SE5BU2528085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98262d6f2a421cd751c7d8d659de704ee4e1231b4c1fe50c1a28a71fc60e442. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SE5BU2528086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5f134e7fa2a0b4fde1fdb9350b9521b216db7fe93720a1127512e2dd4c53ee. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5BU2528087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ea328156a6a1a8c748a1de75154a303fd15b85cd4721574a3fa8595f67900a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE5BU2528091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b6c364632e1a49f156b594224aede8f1178f4e634ab445b24ca2115122de9d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ATBK71202097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9009c5d0771607129f9e167e0ca697a56457e91d2d3213f02c0e508c7df2c4f. 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/ATBK71202098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743ead0d4eb3523eefac231fef474478fad07b4ec1011f68b29a9695b403a004. 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/ATBK71202574.