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 0x3c2637c482f69332cef5a97e450c438baed83f5725e056dbf06f72070791cd39. 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/aad3ff6f-9121-4ce0-a79d-e3d54449818b.json and https://artists.proofprofile.net/proofs/artist/aad3ff6f-9121-4ce0-a79d-e3d54449818b.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 0x7fc2a495f2f2abccbcab7c7e2433e248aaaab7b88ebdf3c1d3d223cbf668b10b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHK2024096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0843e7b8ebc211bf0afd4c3869c84c265a371cc7881f2bf8a92cd1debb8b86dc. 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/QZKDK2167512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39496e2f2fcf51ad1f39a1eff504e3c2bc2a0aaf21de820a863eb36a8efdf2f. 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/QZKDK2135996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecf8e08e0825dac5affd178b0d47a2a13f759afc82da8d06f87128587abcbcb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:02Z), 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/QZMHM2012366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c3546f6bd98fc566105ccd5e47b4c1337cf03d76f450de9131afc782b7ec6b. 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/QZMHK2064246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3e702e809134324d51991f7a04b73a7bc9b0b56b70f83ecb96e9d8d3952c0b. 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/QZS632190014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8badd165538578fc3e2f22fdc630e18f79eb03050deb1b8dd1712cb6656a84. 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/QZS632114819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e63c9f7888cf756a24f8022fcd4fabee6221d9fc924bbf3fd320377d827d957. 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/QZS632161467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89363d2bc10819ab5e9599d4c46759b1103cad84fe465a71717094596a45dd8. 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/QZS652193668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d5d06f4960f2cfbf337b405c24580e77f8c8ddd3fa7169bc4b5ea5eb176146. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZS642160348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f4d23bd73daf2a30dfd5e760504cba6d7429e2c2f8156c728df99683cbcbf. 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/QZS672141675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb9cef6c025217344f58ff013a59c0d517abb4e3d7fd4989aae9ea7e7dabee. 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/QZMHK2275380.