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 0xe23680d85456f9c12e10bfbe4b3dec9c32c95ad39f8e3f62d63281b5fb06a541. 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/faa03b1b-1d75-4705-a3fc-a2234438a922.json and https://artists.proofprofile.net/proofs/artist/faa03b1b-1d75-4705-a3fc-a2234438a922.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 0x865bb200ea28bd4417a5bad046a82e88b01e57b688975d538be3a4dc0ce5d7e7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:07:40Z), 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/SE6XX2251051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58903ad8a12c068fea6a4c83557158dafb7c6c76bd713a596d275e5622114b87. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE6XW2256218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8067571eedb795af831ba7a7f38c4e3494ee6844914c6c5bd57418dbbe189f. 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/SE6SA2220420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad29c005b6df9b741ca981db3d2a37f5101ccdceef0373feb260f541f00463d3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE6I32371359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed17969b85b2b9e15cd7d48878b106020bff81ddb1e5ef5ea1dff01b19e3ebe0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:36:19Z), 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/SE6I32371378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a5ea2d0219b9ffe1f0787ec70c28d3d918507cb674f96523d89f50dd602327. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE6I32371533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dbddb4563aa9bca63029171fad67a6560aa8bbcc1fe8f04deb83b45b3f1a1b. 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/PLUM72400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf62829a4ab9d2c76c5e5d6be465fa77dbec9654e4408a37f74171670d28c54d. 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/PLUM72400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c8672233005ec78e31839528ab59e7e1c401f5fde26a964dd61ed82d3f95f. 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/PLUM72400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40221b7922463b0adb27fce0d0edc45d2e6ec7cf3a5653b46e3a1581a8a71e43. 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/PLUM72400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718ae3c36c9713285da750974181a058fd603a8d97e80a94d476d2008c8421d4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLUM72400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580f756a850ef73887804d2fa46b5705573293bbaeeb339da24c30eb8add2f6. 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/PLUM72400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f7f2fabe16bcb58268eff1cd942543c6c3e54cb2f03fcf25e3a04bdc4b563. 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/PLUM72400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e33a30adafd8b02943c1327a5488378634154ad46bd6d0aff17690402e61dfd. 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/PLA552300049.