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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532f0bc693ab4e4b09ba1ac102b95833f480bd85655bfa00b1fc48cbd984429e. 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/c70aa9c1-05c7-4a25-803c-3934aa47eb2a.json and https://artists.proofprofile.net/proofs/artist/c70aa9c1-05c7-4a25-803c-3934aa47eb2a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96dbe5b507d80c53127e1c3e99d571dae3561d541080bbde3d46d8cd5269005. 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/GBKQU1496549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53805b4f3e11a499f767d89addabb3fd994b4db6b4e1d26d3c609a1075df8d54. 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/GBKQU1568165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594fb73f6ce6bccee032823a0ee5a64f2fc9f7be5683009c597130292111a828. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBKQU1571394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a378bf8bac864d865ceef82266b2e850d206d00e0250912684f3182096b7409. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR1537575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb375da6628dc797ae9c6d1ff5395ec8bb4e12bc5a27bdd9a1789a0afb3264c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA5KR1569832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c3af594371575b156ac92a74828b773d3d1b8c5694759bb951910ea472352. 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/BX0BA1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5963589dd00ec67a8f104eab9d724072be7d618d5b247c4f2ec16b564b3c03. 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/NLDD62000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5963589dd00ec67a8f104eab9d724072be7d618d5b247c4f2ec16b564b3c03. 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/NLDD62000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4cd05ec0123d23e93a1c2e108b22bbfc9b23fedbbb747f73324e2c64da175. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLDD62000105.
Karma (feat. Jon Pike) [Sidney Samson Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8f55244da84599bf13decd15158e7ba9abcc80039f89c1121cf24dda04618. 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/UKLVE2100990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f562bcab6615024c5c26566c92143d233ad24b2f724cd6de761b67892612e28. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/UKLVE2100991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45759fdf3af0c013c74badfcd1fcfe28b4e05a5fe99ba8a6527451b5d1f8c5ac. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2259752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7100121c6e1139dd1ff23dca0cf24876d76501de433c016583f1633f5ee3a16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2309919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d8d55c843466f6ed95e2a6a0c549221c84d4ff25c7ee44dc1c675500605641. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX202309895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323d7cb6e2cb7530b215554e0ebf13fa33de2d38d2ca970f230cfa2fbe58bd6c. 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/MXA3V2407213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58558a9fc94eafa7d85c3b3da0e8ae9206d4b8a5122d50440b9ec2b511770d13. 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/GBKQU2568663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ab23644fdaff02fce11090448a0fec51703ac0418eb6c3508bec3d72cd6714. 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/US7VG1662066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b0de7f65cdc25bae56569595f284194c3ea5cea8dd0b38f01e8c007d986eae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR0012506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b852894f7cce1cbfaaeee635d186e8f553e9ed64e4a7aaed9ab8b12eacf8eb. 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/SGB502395907.