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 0x1ccf40c17e1a1488d78045a8682a2c53916a39a5d3f4c007986ffad81367d7c4. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3167236a-8576-4d7c-b053-d0496c8ab8f2.json and https://artists.proofprofile.net/proofs/artist/3167236a-8576-4d7c-b053-d0496c8ab8f2.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 0x40719de30c10af118d65f51609230beff3458831dcab76a0d053c4c767a81ed7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA072341912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa314dce438b2b70f4ba5b136480061606d498bb23301c9e61598f9d80893369f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA072341914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eec4122d4f7fbeaf7a4b4fedc549e6dc1ca27d004d951ed0dd6c7220f4cf7aa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX452364156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e1da3f382f727a67ee1995eb52e228ef1675bffbdf3fb90104667d824d1d9a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42456881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b55af9cf09b521fc76532b03b0a0ed939f5d9e09240f3c076134b6294faf7f0. 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/FR96X2421848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cb85030fa980409bcad5fee6272d8d2ac0713a869b7cf0219f76debf1cc81c. 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/DGA0T2409784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce9e6b87216d8ee5e37b85a8e40af3ed74a56f889f79c28211c02ac171b1f2e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:24Z), 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/FR2X42548443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238d754e7a3c039aaf959544c11eda8378caef671586f406f201a27c5b3cf3a1. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/DGA052572457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0db60c7449cd5aee7b3777be653dea0ceaf4407626d05ef1f08aa3a8ababc9. 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/QZTAT2333542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e276be28af205ee68dd05a9ba24580889ae667746c36e84c5f722be79ac21. 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/USA2P2474890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101d714a3922276609b6119b06007dde3f70a2eb233a2dc0776105a1eab4b644. 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/QZWFM2461898.