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 0x793bacbd2e5c41f25fa176cc63dbfd9286eef2871d7965f711869426a3b5ccbe. 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/c53f10e9-89d4-4bf3-a31b-5c45ed36132f.json and https://artists.proofprofile.net/proofs/artist/c53f10e9-89d4-4bf3-a31b-5c45ed36132f.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 0xf8c9a3e68b1cdda4590218db422f0e7cc9be257861b88c4172ec7f9794f85da9. 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/USYLM2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f1b90007cfd5245a38f8f54446adb5c304e8e82299f52b9f55e563819f967f. 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/DEH742501457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88066aa3b9f7617ee9eef5fab93da23b4e2bdd8b2fba3fc662189baebb51653f. 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/GXBNP2510105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16335b90452fffb2bb1a78102b6a3ad1c88f5b295810889b264eb92e79477d21. 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/DEXO52468047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7bf90f2d2b2c9b19d428ce894fa5f4259b5cfb18684b34c7cc655829aa8b2. 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/DEH742434626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fc92eb8c3c435a577e1317d101c1a242bb4442c2bc70b84d661b9129870e8c. 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/NLHR22400832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3026ecf126a8bd0b2504c2ff9b5b16f7ac546dec0dfe788e325cb05b1ee980a. 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/DEH742326138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ef2bf5d6ef9c3946d611aaaa4564d708df5ccce125d2955ed3464e6a7085f3. 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/DEH742305439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1f91d225e2f92902edd30f5976e3231bde89968d875c7ff9d8ffd29d3eec9. 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/DEH742301505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9558e489039bb9289fd3e7a407b94b8375c8ba85322759fc02cf8e7e6de302fe. 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/DEH742301506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a488fd6c99547c7b3231d58d6dea352a5c3038a89294fefc3a042f5d7b86d4c. 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/DESH42200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a9ad4c23ce6c7e85a6fdd6a7c7901fef3a7d9e0d3489a73949cf02f87c21f4. 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/DESH42200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e56719286cd754203cf95f197dc379a69b2ca034cc3f6ca0342a6bfb3a17c6a. 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/DEH742101912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55758d56c6eb1188c7213ff4d06672c58967797abb26acede0164e42b9926f8e. 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/GBKQU2019225.