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 0xc370f19e3dabf4f85261b004662d53c7686c376c0360b0569b6600bafff24583. 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/2362d750-6a22-408f-b946-62828eadfb86.json and https://artists.proofprofile.net/proofs/artist/2362d750-6a22-408f-b946-62828eadfb86.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 0x1db5cd1c355d79b728c8710407f429a6514fa8f00dd989e9653b8adb58adfaaa. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXH2J2500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f4dad22f6177f12cedf5a1a99cea89efdfe456c9b39324d09537a3d728a014. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GXH2J2500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2915262086b3ad288b4f54d82224b3ec2c6e09547c3c46a81ea29e1ee299012e. 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/GXH2J2525213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9ae0286f2f6465b0ff9783602f85a0fb76a23e6e1412b80d8b2ca1b582536. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXH2J2525270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8462c521c85662ad65af7b51460704a003ba51923e881e550f244f3096c49. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXH2J2592909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a066e2813367067d3ca72eeca6147feeef08ac43844414659f7133c8d6451f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXH2J2592901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5566b897672b2872ca7c3b68fecc7cf081b45c01ce6aab757e31bbc8bda57ab6. 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/GXH2J2592898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32001c9d9140e2a77980cd4839d728ba05c87d0ec46ecdb5e9890c2fe5e41d83. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXHAF2511708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03f8f1bd35201c5fa655a46ba5ab2e714bf3b2093019b42ab4d79c816e41109. 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/GXHAF2511554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ef549bce9de700afcd84f79effd7bbdf686bdb3292ac189a5b436dc0fa06fb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXHAF2511549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0edebe999e1acac770efa20fa0d2c136aae9dc26c42b741313ba2266bc8295f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXHAF2539705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7802e20be0342e58d79b3f087153a3a33c18bc9cde3990e55c02d7d2c9f43ae2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXHAF2545527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46064127ac03f98c5268d406341bef6e0cb4cdcee0769b49a3a8d061ef1e8f28. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GXHAF2539697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18b822e1b1344452dda6889eb451184fae35c999e210adda01283e39abc737. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GXHAF2579027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831845c758e312934eba8bd46c0ff5d964ba2cf03e116c731f91db1d4c01442a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXHAF2579026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d8e4ed17db2f8e3d51c7103abac626716b09cfda0c958aec96bc9b51c5c69. 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/GXHAF2579036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fd92f72f0b6a7dcdacfede9fa665d72d4196b504e4db691f3549fd56a714ea. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GXHG92550855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204599b2d3e92267f15d6b91721bbff334d91e892742eeaa7eca81e9ded5333. 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/GXHG92550852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5902a1c60fba55808290d6d0572b16590e8ebc33e45b9219f160ae5433df0b2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXHG92550959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbebcfff4c26642ea7e7f0a3d7b9a036f53bc1d74d602c71eba45997a1034b69. 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/GXHG92568697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d863793835940a3f14d71af6dfa2c3ef7f6070f3aff8b09fa794413f49ca61. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXHG92568635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2a878f5155e8386957e8969972e2db625634d47a82cc5d5e9b5e953290d7e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GXHG92568681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2202d07e0253dbadcbc358eb6e9b51102751226d7e85d2ed2a4356db4e416ca2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXHG92595114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944e69ea10aead53dd35841528a16065f29be3a6aff30ba349eaad98e687f9ed. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXHG92598120.