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 0xc33f6599e33bea481619cd407f3460050aa03dbca9a1abcdacfb756e4a2a7cd5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a92fc24-ebf6-47d0-8fc6-c6ee6336f4e6.json and https://artists.proofprofile.net/proofs/artist/8a92fc24-ebf6-47d0-8fc6-c6ee6336f4e6.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 0x4e89011cb840b0b0f1fa775032cad18dd0d1fae047a63a99b038e4ddb3ef2254. 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/US43C1628951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd51e8243ede4ff4566b4c24a40a8614df5b5031479e80bff820944b7bcbed7. 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/US43C1628954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2f1bdaac73b47a9b55dec58e792779c0838eb3f19bfdff825a93349bfb579e. 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/US43C1628963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f694b4c917251bdc81e47508b2def383e9d2140fbd0eb7089150eac396f95. 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/US43C1627250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934ec059bdf768446588acf79b3422f734cf0ae023a2521382553fca75ebeab. 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/US43C1628957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99718e51ebdc3751aed9a704a0f0163248886c19f487a40ba71cdd69e08a6565. 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/US43C1626728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab19778c931595853f6eec800d3dc56708144764020177c2180d43ae080fa40. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US43C1628960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789488800ffa1977e15688d461c56a86afea43b94038b2b2f6fba11c8220473. 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/US43C1613077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77c995ca6d0e869b5be4cd657203d3bd3b87c278a695d946aa1a17138ea3036. 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/US43C1613083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee5f3e84ae132563e0a8de8d4f39ee0ea7b8843303a7eb0cceabbfbc1e3815. 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/US43C1613095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b5ccf65599e72950076e4c41486cf578ec5ade468a6f9d51af05a60d7c0971. 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/US43C1613086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af61803c479f62b1fd7e93ac5ad7052173c033e81d55d098d220eae15382a9f. 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/US43C1613092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0e05e17ed74765afe95601d104015839e64ac14c3e33a71f2f3b5c10b343de. 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/US43C1613089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc27c396ab44976ad42d15771ee325dcde678a39230eb05640ce8cb0478252eb. 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/US43C1613080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca0c8d2ff930a4dbbe7cb2aedabee83947998915575588413e048d16454bbeb. 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/US43C1613074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd738aa79692795dbf12ecbe75300419ddb193521c3a0a7bdbcfb31e33c8ffb91. 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/USA2P2420180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f694b4c917251bdc81e47508b2def383e9d2140fbd0eb7089150eac396f95. 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/US43C1627250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99718e51ebdc3751aed9a704a0f0163248886c19f487a40ba71cdd69e08a6565. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US43C1626728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035eb0c28ae55763b657cef1022575704617a23690330faf29a5cc94ac2c11e6. 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/US43C1605906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1eb9d70275ede54f83f3b57c4d198771099c794ab8db7626ee4df4fbfba31f. 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/US43C1605909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968f4d4633113bd65c606f6d1c7cf525f6b55ef1bdb91e6777eaa65801d0d9bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US43C1605912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7401fc8a1bc1eaaa27583802108c1a13df5c60c303f49ced7efedfe0ab7e52. 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/US43C1605915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc7bf7f0a7b58a6043864e34f032d2d254b771f9f6758b4819f16c7341f1fab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US43C1605918.