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 0x716bab9b6248a84fc3c09dac814907ca002bbdb36e5d0dd1d0ce3320fc25bfbb. 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/6496553a-ce10-4a44-a207-a7c70e0b99dc.json and https://artists.proofprofile.net/proofs/artist/6496553a-ce10-4a44-a207-a7c70e0b99dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ik Heb Gezopen (Hollandse Herrie Editie)
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 0xb5ae29fe804ff1ce6fdc8769e6fa78c3cef32851589cfca858be5c6c3c85a171. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLE871918400.
Ik Moet Zuipen (Hardstyle Frenchcore Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20551066c3ea6b6bd4ea20053f3a39b4843f7166e2d398fc9e06744870f9ab3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLE871519901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad21a27c88d87635dc549262a9a9a9ad3dae2e0c3ade38bea2bf5b6c21d4169. 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/NLE871414701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51da436be3f6083c4192f59aaa59cf5fb585401030269b5460aca315976821ed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLE871432101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49dfa13b5c2ee0c81f47c84679f81309c36807bc02b3adb020efebb6d8b3f59. 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/NLE871713901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8924343ee62dbeae918b56ec3a197a6ffd27d2f7f4afbf4f3a978e75f43e76a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/NLE871913901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b50132f3f34cb569b2cf6a424f0372358b4b85217d55226128d8f9fab219611. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLE872168101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b95d7aacbcda093ae204a2b5628c1d80669f4c5cf7c93020cba8a6c44ee314. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLE872310104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa01a03aeff4d3261dbc36f7147ae72e8cd467f58d1d18df832b86f79e4fc3b6. 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/NLE872416401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c2fa9e704cffbb71f8a47ea577f357ff0f10208730bab665435ec36dbc66ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLE872202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a4997967d9a7588fdd2c4a01da1f44fedb02667005a55d5c5546915091f5df. 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/NLE872224501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74380a91224cd2de98809fa304f79a1e352c51ac44d8911059a4830d7916f4ae. 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/NLE872308801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebeaaea45d1313cd86493cd70eaae97848c0c9d8d6fe81f93d6d77ce8c3b7b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLE872305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16e7cedf685220c883abc6c30be63ac811f4549be3b21d268fa251536b1a92. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLE871723401.
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 0xbc743d308017792f2f56b59d3d98f73fa0add7012970deb8e9237cf8b008c8de. 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/NLE871941800.