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 0xe0d63b50a904a498b160ea4bdeab9f9081cb7bdfeea8c01af4d054b3ea1183ff. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc7bd41a-162c-41ad-a096-0c7673e2687f.json and https://artists.proofprofile.net/proofs/artist/dc7bd41a-162c-41ad-a096-0c7673e2687f.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 0x1440bfd2d2daa817fdf31ecf0bf8a3bb9245bdfd2be496a7588a284ad9752bd3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFME2226166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa2f40d5aa16737bcb147ecf59d30169b26afffcc120133c2cec3f6b41eb875. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA2F2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09ddbc2433c75f28445646bfe770eff1870b70fe5727193d92e1e4585736424. 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/QM7282497275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01126ccde468fae66e244336d4535d2583202e63af3d63099fbba399f33293b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7282497255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f3b99396b904f1d018c7af79fd1e788eab21ebe16609dca724f68dc4b0b5c0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:26Z), 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/QMFME2403922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c7f9fc0b5f72f1eba05b4636fed19badf7b01bb9046872e671bc8f5f978bc0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US38Y2517527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1139fe0577492c4e21e24b487685598066cdd674deabe001f393c8ea16c09f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/US38Y2598770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f11a5351ebdd80008c511527598179adb55aebbd0006f958088be7e139554e5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:51:31Z), 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/US38Y2598772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c9411794caca47752024f38a3cc8168ddabcc6ccc9e132ce6bcfaaa5d1834a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US38Y2598775.