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 0x6fc0e6f284ba29244b2111dd1b2cd876b859d3cbcdda66d54ca8d751ad42bbbf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d274d5d-6ff0-4170-bb67-a60a6f95374e.json and https://artists.proofprofile.net/proofs/artist/7d274d5d-6ff0-4170-bb67-a60a6f95374e.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 0x7355c4d38b4ec2a0bd51e6db6c5bf9cb365cef6222b0d4be285fa007a531a5c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS652262990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea16db5dfdd88adfccab20d16e310931e1537e32528b2a19217e4325de5e4de2. 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/QM42K2326015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90fe3e43e4d743bf6a25186dcdc8ca7defc5f44806e4f8f4f6fa75d2fe3d11. 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/DGA072374630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c6a71973ea48800bb1b68204f17376d603ccf7a1618ad5d597dd25f60e9ba5. 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/QM3DF2200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4dd87d759c4ce1491870a0586dc63aeac42bce086c0fdff03d43cc345277ab. 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/NLT2H2300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b4d2293fc612050cd491086388bbc4727a766e56382af6a7ac21ad5f3f798. 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/QZZEB2361058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2306cef9bbc409c27354e98058a129e5a0b840d558821983d8e52d67b88171b4. 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/QZS632359461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0eca63ddf8155cbec981eda02f35c79985974e4afe77058f124d9dbf60a96. 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/GX8LE2315952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5b258eb77b2603d0d427a39eab4d66e0f51b323160da46885fbde62105e86e. 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/DGA0R2325195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e04a441dec35a80e35d11e4c6d5acd7c0920a66b801c856f47eaa12af034544. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBWUL2416903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11825e72f7af6b77f7083c97f9f7aa8c200af05c02b786c9abb3d46c6342a18. 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/USLZJ2416579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33397bbdd897a42a36194f04cadc99a4cc3368189584e6b37bbe55d1af942210. 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/GBKQU2359823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ade0149bf9d8597f44012aa7658476eb3e1a5652d8f50ed0ad79f966d27c9b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHP2331057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894d1c52bed8532331997a9931e60354f77dc890501895567cd15ad5cd361385. 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/QZS642390035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421dbae34f4ffbeae88ff22c3fd8e7140b5c4d9b5ffecf33141eb7ed9ae24870. 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/TCAGR2287814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10560e426fe172ba8423de2fd7e0aa72a6c8d41a8433c9922091848666e98bfc. 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/QMDA72230508.