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 0xb201b645f3ff48ab342bd798430474614e62f26786f4b32aa0e972ed1232c125. 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/58a84440-0cd6-4b23-8487-229110cd9fde.json and https://artists.proofprofile.net/proofs/artist/58a84440-0cd6-4b23-8487-229110cd9fde.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 0xb82bee966c53459c70fbbc3033f6a66c02ee8358371facba3c13e28d89ff523b. 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/USHM91072903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975e7bdc83f7d99c02a97e16cfaf8882ed9e249b66439a8f3bf75c1184b9cfc. 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/USHM91072905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd006d6e1a10d4bf8d5eaae4e4022e40a01a8bdf577bd8118c57f4b81458159cf. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:05:16Z), 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/USHM91072906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe336df273795457e1ef2143683a116cf8352f1bb47d945f318acb709590fe17d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM91072907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69479dd2362292f202cf7bbbb393fc61a805a2394f6db87bdad5546cae26de38. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:12Z), 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/USHM91072909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad7331f8bb721d0ffb812f4738093a5c14e0d9e2e9a2fbb0be64e40775c0231. 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/INP531900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af62b9160ae903405da44f1d6452ad42955f1257db9657a08f4fa31eca96fa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/INA331600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ffd3b92c087d7e8c7b358144b911e187011f1fd509a278c4ffea5414d8e822. 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/INA2Z2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334fc691b21c4ad2512ceed7177346e20c41168a9d3e597f9d0757329b759a3f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:33Z), 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/INA2Z2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f4af2b5de9266b44b77ba5c2ec53dd5375ad225c26b72c5b80b4f371d55da1. 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/INA2Z2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3e64e73a41150c8d9fbd8fdf82e62ea443cc7d2ad1874f8379aaeae287dd2f. 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/QZWFE2329950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb600abb5c574f95c8337f3fe354f1257254d45639ef22f1a3b0b071d7fe1fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INP532300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0c3b629d846eb7e7c98921c2592435d16af1a85b79cc4316a32b1c9676cc7a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/INP532400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8396d9975b6bce01f1943f9032574c6a50413b48008e0b646db4606264d93fe. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/INP532400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a25a4e17bcf3db38099582dffed7266e7a84e3c9838cb9ddcc4aaf75dce838. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:20:57Z), 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/INP532400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ced18cd34cb0503a10a1a20ed227733df0c9351c0c2e83c093a1532851ad83a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FRX452548722.