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 0xa6bc24d5536d3d4f1087f777e586a10eac087819bc994be52cee1d1f6fbdd03b. 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/c4b7cf33-a734-458a-8587-539d62665303.json and https://artists.proofprofile.net/proofs/artist/c4b7cf33-a734-458a-8587-539d62665303.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 0x6b60132785ee4f5b88bb48913bf37bce50455a880f193b05609ed3ab5c72e8f8. 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/USUYG1496556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea56d77e957b47a7875abfcbcd758a6f6afa7da785cd5aa1abbc949d5bda85. 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/QZNMY2298954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111e907e4af64bbd4185ad637764d0d3dd76fe311bf5af4b5ce7e009ad6a48fc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUYG1198972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3ef93d71a646d4d0f0d368b4bd358b4078cb69774db9b632e1530e1c352f44. 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/USUYG1198974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5065a28b77c8bb82d99fe8f4b7d889b225e442375f3ad2d1b8394676a387cf5. 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/USUYG1198976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0834f5803f16fe64c56077e33249c293a2a2132b88dd517dc8efe5537e40e52. 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/USUYG1715031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b37fb31e0710073f779cbd8d55594158cdd8e16852524ea95a6edd5985f8b0e. 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/USUYG1703083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c51c0c4a699f904b74934f45c1f8e15077ca80f4a41f15ca3132a3da3c21a. 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/USUYG1357908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a3af37dc182665664c4fbb6590e67c2e10d0fad367c230d4b56f9005e436c. 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/USRC12001470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368a2aaddad1c70570afc624adbe189719cb887ceb10dd3ac7e9e5ae004c6e4. 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/USUYG1099912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba6b72247d10b1c12495e8337636955cda3b13e3aa729b54ec45ad1a7883aa. 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/QZ5FA1750523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d5ad45d705105a9b69f6e7cd44e0d2c3e80c91fa1f5b159807004ad6d1003f. 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/USUYG1099905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cac6b7893e380da0393f063492cf500f855a7ba1b9d7b7f5f998ac8c7b4a8a. 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/USUYG1099916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec46e68415f81f827015413ab17f36f0541366888e765453ea79d867815a1c3. 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/USUYG1099911.