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 0x7bf783612c58b395ff3171c8559101fb7da31d34c666a739596ff820b1924d99. 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/83ccfe82-6a0b-4e36-a2ca-96da514a1e4c.json and https://artists.proofprofile.net/proofs/artist/83ccfe82-6a0b-4e36-a2ca-96da514a1e4c.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 0x142e1f4c8db2d78fe145ca170401554d77b6ea7f2cbf9cb30e29526d4cc804fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2341381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dc970937c87c08b7453ad1cc039807817194d6c6cc39baaae85588fe008cb. 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/US23A1574584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d908dd7792515b6c36e48706f702f255d754a2e1567ef0ab882604b4611c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA34K2301656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c32824c8d04d304b3523db4ecf108c81fcc1d0e41e6b2a1f3c7e282b8f12bd. 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/ZAX012300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a694b36f91b344556ffa4bc629004a87e9f4925a3e2c21827ddb71f3ce0544. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US23A1567085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e0d94b46a0175c103dfdfaaea7571e7302e5ca79d24f7d8ab6e3f4bf71e45d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US23A1560339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e803b6a06a91b9e3876297bda6f40ddfb771507ecf9280e6567ae42fca9ebeb. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US23A1560338.
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 0x4d6e69425a8c2dd97bebe3a46e5a570e9c6e85745c90d0db4fcc17dfb92b7fc4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US23A1560340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcea4a7cb4a18e7d2fc2da41fa921cb9a35972936131e8840d84923ff7775618. 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/US23A1559273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1adf64b8ee3c1992925557655645d8c23556990bffde1e270d9627b52e2953c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US23A1555561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7af90630a06f2cf08e7494861f6f74bab6bdfc4a25f440bc27009abde4dbee3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1542449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d67f17669005298013a1cae9435ac97a8690bd9f069e87ba9cd1457375d8d2. 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/US23A1542450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01694ce33c9560797226f980be6bf78d33a14715a325a2a0194a96a2ece09022. 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/ZAVDU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b37c77647f11a374a0404daca89c49ddb847473cea93b5f082a8a44aa221d06. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAVDU2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163290dadb950c84dc8a14856cec4c75ac4a865ea25ea42c7ae6b6d03704d2a1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US23A1580153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b53f1f38c594b212abcb9b03c742e6b876d4e8032164e867eaa5c49be9262. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2274356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd6352c208943a6f17b35e7ee733195b55a482eabd4413b4ba09c17a6dfb32. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US23A1536734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d908dd7792515b6c36e48706f702f255d754a2e1567ef0ab882604b4611c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA34K2301656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba39404169570a31fdc8b29b8ea369573f9441d487233c6cd198bfd6298b94. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEY472371380.