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 0x985f07530fc777ef4f9bfbfe2d57d2accaee955c8690e4691b0eebf40b42e588. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f443a7a3-70e5-44d3-85dc-705722f8dac2.json and https://artists.proofprofile.net/proofs/artist/f443a7a3-70e5-44d3-85dc-705722f8dac2.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 0x9e0cf9c3e1f192ad99a68754beeb3b325ce4c810f599afc4a6aeabbb96b6b77a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB2321100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aa446c4f213b31278fcb473ab43655b975c36d57755468a2b5a824dcc2aebe. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GB2321100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11bd4f556c7c88e3527d80d5c866c1b3574789707b3d3ea292f4d684f9b63f7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB2321100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c40007e9bd1bb3f7cf80838ae02d7a055462cf2484b5f933e14760ebe306a60. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GB2321100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3b46b8167ea62c77239e259c1f6522d41038974229777570d9c2a79754efe7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GB2321100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377b0c8842de99d247ae2fee449bbfd71572de62a523d38424bd3c4703358267. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:45:00Z), 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/GB2321100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a68e8cfef292fb3149f0948f6ac962b266db7a94ce153308c61b1031afd6de. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GB2321100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d160d9e92558cff39e3c9d57e3dd6565ef08f99eb77f6159662ddbaaf57d8cd. 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/GB2321100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e5895609574b239748d25e45b7cb024c106569dc51a9599df1015b2d0167c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GB2321100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f5c0cebca4dd46baaec91cc9c282d72473ce782445f03107e5f5eba33aa06a. 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/GB2322500459.