thumb|upright=1.4|A Formula E/Division 250 cc superkart at Castle Combe, England Superkart is a form of motorsport road racing that uses karts on long circuits. The bigger difference between a super
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 0x6ccfe0c24b89c1902c83f87df56cec9cacb38928bf20bbe308974528e508877a. 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/da78ebc7-c63a-4b29-8b66-67d9a010f9bd.json and https://artists.proofprofile.net/proofs/artist/da78ebc7-c63a-4b29-8b66-67d9a010f9bd.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 0xaf610d05aea1a111978a83e86885bac9afd56aee58e769e0041bf5b6d19fff6e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SGB502509591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec9db9d8e943a9b1226a08291895627594a9e062d56964c54ea8b1aeffd9e0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SGB502503748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d80f2309f60e0eed5c12e99823047aa282237e7c0ac7b73c65a68656e864c8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SGB502503084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2260f96bb98bfca46cfb23a55cd2e8916452db2113b814cb660dbd1bd5b7e936. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SGB502505859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65da8f36bcca4d47c33df8be5287c6912086b1f1286f10bdaa54ec38b4f949a6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:53:55Z), 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/SGB502509352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca1c5a651de8fafd1b20eba6219afdeeac3f6bbad28b14c107fabc0de40afe7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:22:20Z), 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/SGB502506108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734f0913e9610934e7e0f668177be560d4d834f75aaeb591e8046599fdbfc77. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:24:41Z), 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/SGB502500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f82a67ebd8b68141ca6845e03a6808b859a0cc97acd1fd11a468097497d49cd. 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/SGB502503821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e92aeecf6cea48aaa0fbece49dfd4b9201c06337285780d6b5ec7b8297a88db. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:02:57Z), 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/SGB502502214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e644b709a5c3d6e6729e4a7f5674e8304791f822100309fd373bd59b49d77. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:38:06Z), 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/SGB502507714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8496c63e6896f4379793f166a8bbe2662aec16cb4f99451b80174ecf966fd2eb. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:30:40Z), 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/SGB502506967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8995e3993c9f4773e698ea4225a5c314f14a89c428445a5df570b1bc69c59. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SGB502505839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c67b7e58beaf3993751031143da03b7716eaf02ef321c943f72c8b98e74561. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SGB502506049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b6a4abc25a2c30933f0c330f9fd4b71e32d64ed787f98211bb7a353be51ee0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SGB502504162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ffc7b783df29b6cfee2d70e700d034df6a457439b8fbb446a1dfa588218d0. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:02:43Z), 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/SGB502509944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404b608fdf75ec9a62e2fbc34904ba8d16e8b2bc1a2a6a53f1f7e187047215c2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SGB502506819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4356fd7058898c26a7425d94bf65a039f798f52f8cfad3fdd54b8bda1a769586. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:07:43Z), 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/SGB502503453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52c3d4e600ed3938821e43108c2a4194f48ed2fda0440701015101bf4ca96f4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SGB502503001.