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 0xa44c8e292ebd34fa45d570411f47bbebaaac2e65537272d81837090203397849. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23605754-f104-46c6-b5dd-551be0d554b4.json and https://artists.proofprofile.net/proofs/artist/23605754-f104-46c6-b5dd-551be0d554b4.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 0xf8712369c186bca8974cacb700f019cf2b14e719b406c4bd185996b2ee5fbda5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/LBA131802907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4742bea94f4fc1848234f7bcbaaab7de5c920e9f715ede27160173ad6df4c29. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/LBA131500788.
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 0x78344b49a3832307c4a0441b040215a60c57ea37057b1fc64374cae43da36817. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LBA131401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d23c573cd0c779cd4ae13aca3d18ec65cbe35ae38b6858cf96bd98271ef4c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LBA131401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e7cb44b99f0b5a833c6e8c3dfdf39eeb10745ea76fcad9ab364cd28220ed2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/LBA131401084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c041ac3921e40d90a7d4a0897c5a09170afd9afd4af75cc80b79bc47224dc. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/LBA131401085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b355e5d675f69b017ac3cbe20bed44402e6445f6c6cc4b8dfaa3508fe0529d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/LBA131401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbdf95f71dc3faaf8839d24f3ff2c641e40c238832418aaed8f467391293e68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/WTRYS0000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed77c1f505252333606c1c1b4f5c2054ddcd5738121234074d73015f057ce841. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/WTRYS0000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83ec58aaf0a9000805e1d0a24c2ee6fae923d2c15d9b8afad2b8b0ed075f61f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/WTRYS0000356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d87d39f4877de656693ea8fdc9df7c940c37714269bbb1a9fad18323a3c050. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA142402544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212010e3274bb6cf7ecf8fb81730643bf57f61a573e12091494b049db30fe678. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA142300598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f042726fb5a6b3a1ac5d296ab619b1f39280761babc48e81718257a761164e. 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/FR59R2313680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fcba294f967161f3296ee0830150cd2912d8cb6784b0c891ab45c3c0237595. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AEA142106327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa211254fd384e3d890a047dca598b8c09dff661e018e691e7218bcd834cf1f60. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AEA142103214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9c25209c4e7187425f018701338c59cc1b7ace6173298414f3e356f2effae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AEA142102811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fd09a3bcb68f15fafabd8b9f0e221ace7cedde8e5e58d71065e0d6eb3ae027. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AEA141909348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3227cf2043b53743386f29f978cdbb7b9860e437571255aeb774008b5a17ac6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA141909347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ae7dfef605cce53ac8a3ed9370f467cf9023614c19cb5d91068b795063c17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA141710848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde3f7c09db446d265dc7e693a47c443648a0112e323c8c780915ba71486ebd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AEA141609149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a20ab961d7664c9e59acdfc20e4bb29fafbdd5abab67325b43a18e92a31213b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AEA141206002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549df7bc9132af41375402f9a9e68c4a85c595786e13c821438b721e0ed52c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA141105947.