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 0x324ca6d845a5efd0ae1c5a33a7f5c6a294f9a15824250a9dfddb9d9996705dba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ed8cb40-c90a-4500-b8c2-cd10c8f1aa66.json and https://artists.proofprofile.net/proofs/artist/5ed8cb40-c90a-4500-b8c2-cd10c8f1aa66.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 0x2ebb51da03969a1e1b02758dfd80a66668614b3755fd085c39980447bdcd2264. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHZ2489491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de853465158bf31b4226e8f4631fb797ffd747a40ce51de98cd1e1eb2d99377. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAHZ2489315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2df966aef49f344b2ab707f22430324db86a3271aa1d2b0f82bf4f4a318f18d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNWY2420416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975ab017a5a84dae73e4e13993832ab5208f5b1d54cceebf29dd47050602889. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB52433096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e8c33ed821c710c6ea006f918d24ed5e23d489ff39ef316e51b3210a0b8f8e. 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/QT3EX2412131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74fccf3a35fc7cf6b0fb490656f5ed25658e9e7a1f70b775c410a5ae3809b74. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT3EX2412133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349bb425b596c2cc1de67d930adc17d7b374ff5f0ab93390edb28aa25da7471. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3EX2412134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f4f08861dcab9ac7e3224d9dd1f70a5062a4e8315fde8bcaaaa794aca6a316. 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/QT3EX2412135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcbbed0a9f23e5f597f77d029998aa4379fa9e0bc8774be47417a178d42a14a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:47Z), 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/QT3EX2412137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196de80198702a9d41c9f6751ef4b1b6e68896bcce46e978fb837af09f4a3b9d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EX2412139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbff35e1e397a6e952b7644a75888c25ada4c628a360d948019c8f7e93516e9e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EX2412140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8078551d69afa58d4b93f729beb2b2758a5f9beb2d6c95d29cb610934bdf4de9. 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/QT3EX2412144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb47f95c9f71cae796a55efe46097c7c306a96960f830411351e76b2122b250. 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/QT3EX2412147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d38f3ff0160ac2a98a68f952543d19137c98660a92ea8ff1a8637001897a57d. 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/QZK6Q2522771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd7b3d21f26e2268ee49542cf43e3c96c6662b17fd289940707071b4f2b762c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2522774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a377e8ce2596865d09efb8bbc5d144951a6ddb8e56f1e1c516c879bfeb6aba. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZK6Q2522775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe191d76959fa2b9892e10f6c1ab1fa0810457920e1da6e131a53c1b7f85aca78. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT3EZ2515365.