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 0xede4092067811a29e8c32e33407f7247956e9315d2b835a24d5ba1c8458a0b7d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fef2825f-d72c-4dc0-bd11-14d45791adb0.json and https://artists.proofprofile.net/proofs/artist/fef2825f-d72c-4dc0-bd11-14d45791adb0.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 0x50a7680feda69c9c8bc02cb32beb5ef914aae1d6fc417dccfa0a51d39190a6b6. 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/GX53U2450680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb893b9c8ebd098b5c3edaf0a8831ee82461ad424ae88f30fd2d91caa9ab774f4. 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/GX53U2451375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2537c5440c045d553e7dc49fd804de257a93cbb552aa3c5fa3ee7ed784739f1b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2451376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ef2f620bcafe042dd71e85d672bfe5f4f96abadcd40da9f68db8cf6ceb057. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GX53U2451377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cb9a845d3bd09df32e776ccc357df9200ddeb555b728f7d338498c9225abb2. 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/GX53U2451378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf952e82435683198803fe5e8a730227f236d8d9f86e083fcbec03e17227533a7. 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/GX53U2451724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d6401da14d633ccbf6e8c43381f60c1d918c7ba3373a176a7a1cfdedd9db6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2451778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93c2081daf00ef97ae24b5496224198868c05caae9ed56363d23bc216c6ac39. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2451735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f9b1e91561e00a04eda41facd71813faf65289c6cae18bb41460e894d18a90. 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/GX53U2450675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119d9ce9364c785fba9926349b9aca5000fc36411433a9c6d30053638201cc4d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GX53U2450676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779d8c93880e1369ae1e7892454ebad3236817930cb54cbab43b610166880078. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX53U2450677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fceefb25e9abbc9052602f8615e4a4a101607db810c3fb55bba1308251da072. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2450678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bd547f3360c56a3c7257d4307886834da879fca1c67a27082d597041153215. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX53U2451976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8158eea960e5141936729e134f3709747ab67393590cb086b7fb3ac856d378cd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2451977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab056a4e07951010aec03548d2e50b9cc6357d7195933d2a182a09258ab1973. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX53U2451978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a78e73aa9dbb32ea5a3f3892b59b87e0618c3b513124a70ba322f5356aa630. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GX53U2451979.