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 0x607920193947a509fa639e199a3e115cfe08481fcc0469bbae87ae00659f63f6. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03084876-d6fe-4a13-a2cd-3058ce822aa0.json and https://artists.proofprofile.net/proofs/artist/03084876-d6fe-4a13-a2cd-3058ce822aa0.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 0x04b4dff4867a0d5dae98508872e0e2dde0402e902f71831fa24298d75026dbd6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPY2334186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bfa3af1f192d15b90947537bd599487c01b169ac37bab3c9f432293ed65b40. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCJPY2334188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41cae710f970a23cb4a54c091675fa7e35fb635b5f3dc071b382a3a07845cf8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPY2334189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0313932fa567ed4a057cdb8f85eb9fb5be4cb4cb870761466f7a3cb5a7c87c5d. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TCJPY2334198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94e7842b4d5d5e9d28dafe92f2ef5dc8f5f05445e129d8f9a4f003f9005d6f9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPY2334203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe9f133febd21bdbeebfc2e90e8cce6931c061254e425dc8b1d6991b70b0cf. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPA2427076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbeb7991ae3b87a39cd5382bee9c06d3d40f53bdf93ce9bdd5322965f8c62f5. 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/JPM552500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f6a01868e6a83ca4e0b5cc96c390b478b9af67f725df50c293aaee5452dd8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPM552500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbb20da945c5260625d32a13f2d23ea424fb93331946bebd9f87714d4487e63. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPM552500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f24bbe1659add5cc303f1167b79bed4ce422abb96bbf3fb286dce14967b335. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/JPM552500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658093750d262c3cdd3fac487450e85d114fb550883dec8fc0c573bda6fd7743. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPM552500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438b3c626b6e1b775f594117398271b7145af203d97c0f5c9286f6013565bc00. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPM552500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d6c94ff81063ebc8b9a49874b6a6e48c6340a3f5542e50b2edab325b0db310. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPM552500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052ef344e41d4d26c1529af4ddbb452cfd59cfb193bd569f5797c2ee0bb7339c. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/JPM552500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bfa41d87092cc756d57e8b3bf904a07a3ffc456154fe22b34d43066c9c072a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPM552500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58889258fc508645b97b024cc9443092b4eaa0e6e51a7039709f48e68acee5fd. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/JPM552500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba36ed5d197728732612d1cd34038a3e669fe545978e4f5da388edce4e06312. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPM552500026.