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 0x7256498d548ed3b09bab11da689e570bab5075572ec150bcd9d3e331dadee6ab. 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/25263b13-191e-4c6b-aa98-d3031db42544.json and https://artists.proofprofile.net/proofs/artist/25263b13-191e-4c6b-aa98-d3031db42544.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 0x02d199acaf01dba36d58fee4f5bdeff1a438ae07fbb692164059a8d9e54652f6. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/NL5BT2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09efca6ea383140f7ddc86ffe8c1560097de6d7fbe20d4aac0833954c7f06f37. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NL5BT2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dbf238b0f677c9eec7c845b09c6f5b4bbea6f223d3d84fc5a5a945c1d2459a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DE1A12186249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a26d1d8810d359f77f592f12f8ef9178e66905ebed179fb5a275c47e8539d51. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBLV62120293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a21205f646b6e62f90e911c31a6a4118b8c580ada9c43c93979ca4e9e149d0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBLV62120294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d21fb1504a64e69040b6a179ff2eba632b541e717978d3967cc42c656cb79b. 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/DEXO32243008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e363f583eeb2f06e0d0a4958417505a782c1d0c16e14193db2cd915e7836eb. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US83Z2331773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792591a3176496b0c18d675b1e28d634fe023cd3fa20a7e81e80603493e83468. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEXO22377645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6a255c5ca0d538aa727e707b21833a93a7e9787857d83b493c159343af70d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEXO22399985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f34613a159311d877e3081c40be6a04aa842f45e4485e872773b8bf4981114. 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/DEXO22399983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54381b51ed4fa79bbe6c88e97cf852aec9354a20517a463b13850b7e5ef62e03. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEVU52499942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a88dd59081e61acfb50dbeb0163308b83d0dc82c7eade4cc93494cbb690e94. 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/DEXO42384690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b0b2f7cac53012035c6ad463a12f2762cd212763def6de03f4d5757d17f705. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEXO42384691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac63ce9f19f486d77743cc1605c4205d9ea0e4dfe482d66d45476d282f5cec2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US83Z2406359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23148b68df58a2543b7adffb32371d6fbb15cde221833ac4f91d359de840851d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US83Z2406361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a02b164002e5853aef3ec4dc102e7a35fb0d1bab8538f386a3061c76e5c0a94. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US83Z2406360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb217b030fce96e4b2d27a4a6d9d13eb6308c9ebff89fbca70bf0f0fc0b709c9. 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/US83Z2503331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761ec12c5959c7605e13520afed636e1d8540533285d386ced6d2829957e9b0a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US83Z2519759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff95a6d7493565667967ef14d9c18acff0a3082305e1ff192ef18f0ad5576fda. 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/FRX282536212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a7b159292e16b4d0aa5d597bd3dbc9fdbd676517ef53233f285a65890c5ec3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEH742101808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123bd445a441136681f17a65209a8fb12d2a52de997d59abe3d99cd2d018573d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2044097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb313e606abb31fa5dc93e5cd477ba85070d4b64b3d1896400ed06b6ec9428f48. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2237808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5240156ef9dca091eff8b7448cac6e03c5ca0db1c88190a1f6740e567b340b4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEY472476946.