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 0x57d45e12226c690e2302f78cc55f10b35bc517a6c2b254c695eeb2c009dff13e. 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/a9ef6a0c-83b9-4d4a-a383-050ff5c880b3.json and https://artists.proofprofile.net/proofs/artist/a9ef6a0c-83b9-4d4a-a383-050ff5c880b3.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 0x031b0638ac26d2c7e18736d0712fe346e7e9c68a3019ce2612deb95d5c580043. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITFR82010031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71f4761cf17ef7a81bdf23ba3c51314514d4292ccc11d183cbc51b39ed171aa. 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/ITFR82110109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8169959db8b268093c447dab4790a83251ad6cf2fa9d1c8e8b71f9a0988629. 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/ITFR82110107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031b0638ac26d2c7e18736d0712fe346e7e9c68a3019ce2612deb95d5c580043. 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/ITFR82010031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4475ad834632d6760ddb80735b14998eefd63b1b8cc164e27c3e3aa62aea1fbd. 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/ITFR82110110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f187b4efe2cd381e3f9bf21f4c7479383a87a1ed8cba55977c3c6a20d576a. 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/ITFR82110106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd526ccae2d78ff70db395dea63b046aa911895d2d30ed838d6218f32d77b76df. 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/ITFR82110111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb24bd77d8240beaa0428d055d67960294545243217365d5eddc86c514aec07. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITFR82110114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88798c42028e48cbf193ce516b5d220c0ea9c83ab7f4c19c37e8991b77f7d3cd. 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/ITFR82110136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1686b6a1e50de7d9e043d8978661788cd239385ab4ea9a2913e46b8c33363e12. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT8U12200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d3c341dd59dda1c529279c31029d8317197bd049553d44f6614811e4ad8673. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IT8U12200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887697d5f982dec7678ca35e201555de7ead7cd056a61e91d6cf2f1a3332cc05. 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/IT8U12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518f1ec9c944cc1d9e1aa88bbd7cad384c00ce2fa668529a05f311c9b2b7d88. 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/IT8U12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b05d630f59e93ecf4e0e4ee4d6414d8e85187c5f550f045a57df00d79ee344. 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/IT8U12100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518f1ec9c944cc1d9e1aa88bbd7cad384c00ce2fa668529a05f311c9b2b7d88. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT8U12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887697d5f982dec7678ca35e201555de7ead7cd056a61e91d6cf2f1a3332cc05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IT8U12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d28af576f3e303dd90022d7ed44f99b7f54b2019b7be19290635467385d3f. 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/ITQ002400838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da6589459d9a582080716d41b4985daec0862934b92a9bca4e71b2cf99a223. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITLGE1900067.