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 0x6755085267191a9aa4c516d8b375a6dff95ff9026ab1153eaab220153dea79c1. 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/59edfb87-98cd-4877-9b20-3b7654d345fc.json and https://artists.proofprofile.net/proofs/artist/59edfb87-98cd-4877-9b20-3b7654d345fc.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 0x4b57627c26a071876e711271632ed2166e0f853eb269c7c428c8b54e665627fd. 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/QZHN82418512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd4564b4f6742a8db514fe6369413faf703833f546522e003ed627090b9f02d. 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/QZHN42465236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab9e505d490756b1d8afad9e9f65503b9caad92b8896291ddda2babb7eb6d92. 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/QZHN82418514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8657d7f1e41b8ae6753452c0522fe657af6c9916c43fd34cddb0e09b0fc72b1c. 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/QZTB92381906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d63c4b694bde75df1419e8421f390bd583528bb1d30ea360cf09312d23b4e2. 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/QZNWT2398195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46366038e7feb515273b82a4a458be8f1163528c14207ab2e94962a7362e72e3. 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/QZTAY2251358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac8d09693b0646489c3ef12eb7fa2d150f7d9ec859ef8b82651b42d1eb8cc54. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWQ2245458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac65e3bb740dc76d0dee8469adbb388f2d6d4662bf45b647823a1bce0cfb7d1d. 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/QZNWS2232697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7245c43e2bd809a0e41befe05ecde14aeaa9378d6c74af542ee8950e4905e68. 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/QZMER2140838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a9bd189b4b271709f7e038dee3981d32d9f3cae63d4875c6b22386db6d85d4. 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/QZFZ22114691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40894f9dd8c2b454c2742c9a70ce3330c2210c395dbaf1d9e153783215ad028e. 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/QZDA42157517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cc20a34ed77d9cc3326a7182ad6d0c6505955a3a94acb10f230350e52982d0. 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/QZHN91978475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382c4ee17de2eb8b19cbc6bd5cae0b134ff050b8f40a8065f4cce3b02b1ff4f6. 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/QZHN91978479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12be9f024945faf5d4035ae393a448914d5b4325cfe9c83a84ec4c700c3e886. 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/QZHN31973053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366eace1ca90bb39ac0a12e73c13ea4b2f42481a07dd54f6665406f9ee4861b6. 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/QZSYP2385201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2c9f365e020ad52d09afc6910285eb3372675df5098ad28c592d7da7adc039. 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/USUYG1415226.