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 0x886294f4e71cfcfbe8df407d1d3a6ab800efdf67d445286f0350409e1f350b83. 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/47f70159-9207-4a05-a199-10ed830d6992.json and https://artists.proofprofile.net/proofs/artist/47f70159-9207-4a05-a199-10ed830d6992.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 0xa14b62893a1899f707841f3a1104aa564880a26b4c458a418f9e13d233e9c3b2. 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/QZ93L2100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9066356d542badcb05fc225251897361feb4bfdcdb682ec8bbdfc5ea5f92efad. 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/QZ93L2108622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06eecb67275c24b3d8c597b85bdba38a734b86ffd5b8e62c299ea23d3209f7e. 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/QZ93L2106582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce1b05cb3adf3d090226f9c6d7f7f71f1a359d9d12b84288355dfd867c5470. 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/QZ93L2112698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e87930b973dccd704a161061bba0112a6aea771d9b44f640e0004178e8ebe. 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/QMEZE1949109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97220f88cfd482dfaa75fc22e3627adf62560e6c44f038ed8e9eed93a06034b. 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/QZMEQ2485584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ca2d943c7b567ec935fa5412991ac68c71270ba5769b740c61861c5640307. 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/QZK6G2468963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2c597c5b47acf427dbe98ce3823fad1952eb8abfc84447a17edd525701ea6. 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/QZK6L2483740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a9c99c9074f8df0693c199d78dcc9346e7dd13aff6255a8c607eb03ef2e9e. 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/QZTAS2331189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdbeaf8a8ec70d5938e1ea50f0b085c88077b774054bef9ebfc8350e4ac5f7a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB82206093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaba1ea2330ac69c7e2529c89564a821581c459797d0c585108aeb4ae3f16e2. 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/QZTAX2279919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaba1ea2330ac69c7e2529c89564a821581c459797d0c585108aeb4ae3f16e2. 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/QZTAX2279919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff79ca048c4b588b3050257a10baf3c08ef0f55b78e44380865ce0b1ddc268. 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/QZS662205635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f1a4973b4008e68ffb8e0a0bbbe326df1cf81841f0c18fc89c3b15dd576afb. 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/QZHN82227602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f7de335dfaf54a8c667b5782971a0125f6c86cf023038c804b63582a18b2b4. 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/QZTAT2172368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d35e26b9d5c5a5156040961c779384a747427799e89fc91340f9381d69b6e00. 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/QMEZE1948995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe534d4abbcb5f4620a47ec3c5bc8dbec73049e8995e058e18008eaaf78803320. 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/QMEZE1949017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90806b4940cfe2d5a2f9dc8009bfe2f7613c78a593c5869df0c2f202c5dc0180. 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/QMEZE1949155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2c597c5b47acf427dbe98ce3823fad1952eb8abfc84447a17edd525701ea6. 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/QZK6L2483740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e87930b973dccd704a161061bba0112a6aea771d9b44f640e0004178e8ebe. 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/QMEZE1949109.