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 0x1b773f20775d19e74d2c0fcd3d9dac07805f08ace63196179df5eb452a0eb218. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/129b9364-2cae-4832-a22b-b82c1ab0ce07.json and https://artists.proofprofile.net/proofs/artist/129b9364-2cae-4832-a22b-b82c1ab0ce07.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 0x439b28aa7fcdab768c6e3eb84674db74b784e0a4c42c103459f0eabe9bc477c7. 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/QZS642395195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a1b56968bf6707582e6e23eb5be9b941080adfa53f89c44372e786f7070eac. 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/QM42K2397746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45afd68ea1351099065f4f6ca4374076901c27aff36bc030ef28e690b860083c. 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/QM42K2384507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7222bf8a9ac088e70ceec953c42ec902c6392a3e553b22ecc4c5dc903618584b. 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/QZS632345486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5df6fc939acd825461c0e453c0bfe0a1fe6820d4a4bdc010d464458e9f1a4. 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/QM42K2363362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cddbab0c1cdb8c7e8a515bb4c9efb7d03552d650645de0fec94d9bfd3daed9. 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/QZMHM2367690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b5ef77329e44f7b74374bbe734adad1f022b8e75f4111c7853017a874879e4. 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/QZS632377606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c14de20e87df51bbc4a5e4be14d6a037ff7614c90a13621473b88910f719d7. 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/QZMHP2397154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86e698ba5ed4da409a8fe4adcedc21eeae29304c03d6537ea52eedc0e2b5a22. 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/QZMHP2374199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbfe5503aef744c4c18434a8d63192029a7aca7d2016dce1bf215f57aaa896. 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/QZMHM2326268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1069092f4776af6bf54f3c391781f946c663786ff45861ca12c20d5d5083a9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMHM2380681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c117da19b7eb5d520ee837f8dfa6f7aca54893d9f95ef75d663e05a2e3368bc. 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/QZMHK2245508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e29713ed71bf2d06507aed9ce508a1896b3d931febab2bc72396c215aa5cab. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZS672260209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a66c99de8ce7da17f1b70b26f94e25702c76bdba1c9bed75fab1209f57ddc9. 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/QZS672176041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb4cab7a331b902e8db732e22a33e4393546f128bdfec686d2892357853b77. 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/QM42K1949364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485dae02511233ccea83ed3973462acc9ecf7592df344002a6b5160305e96e7e. 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/QZMHP2089342.