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 0xe9f59cd4de70966ec9d262300646e70eb5d19ad0f0fe6b6f71ac6970425e1754. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f6ae715-8de5-4bd8-9c2b-ac47ee198c19.json and https://artists.proofprofile.net/proofs/artist/0f6ae715-8de5-4bd8-9c2b-ac47ee198c19.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 0xb7530cc166f92e80fb191baa27605308db99fc9e4f3ac6507dd48b09caa453f2. 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/TCACE1525751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72fe615dec1ac432ac4576b4cf5162bcefcb9a282a0fe730c7d68335423a51f. 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/TCACE1525754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731a7f100a66cca3f9224201add2631b8cf435c2fd66c850f9faffb19d49f70e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCACE1525759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c895c5623f289fa5c209207b8ae5b15f9b085d13c45e9a2fdc87408ce8a6a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:02Z), 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/TCACE1525767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6697a036945f6292311cc688f50b31aa724774b1977031fee5f3bc99afe71c. 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/TCACE1525768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2472ba1346fb304f67c7bfc4b23a7042d06a949cebcd6c990a6d4235af0198ed. 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/TCACE1525769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366327d0d387de9ab48410d4627a0a7acf5bd0318888c14803c8d5fae3bbae52. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACE1525770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd755432a0009e9d4bd5443cad2ee1538d41e093b69069c94ab370fb8898fa6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACE1525774.
Hermes Sound-Effect Ringt1 & Alert Collection Vol.1
iNokia: iPhone Meets Nokia (Funny Default Marimba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a677eae2ce89f40bfcd109543fac3e75ffa9bde373cc30f29047ddc0da42d7. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:59:25Z), 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/NLR631540001.