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 0x1893b8c7ee63fd1bd6d430465eb3211809392a8386c323daf5d2f565eb775dfa. 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/9603aced-58d0-4f63-b7d6-19c44415bb6b.json and https://artists.proofprofile.net/proofs/artist/9603aced-58d0-4f63-b7d6-19c44415bb6b.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 0x4cfe88a9464fb11223666d22bc0704c804f9936e603c6c88aca23e9d2932d7e0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGB2238288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8a2ef4ca4927c63fd543f127b1ec35ac0ebc1b0194f79fb601d5111806f8b7. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAGD2269435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551e5f288f8f7e77ed62e74cc1407b97052f41489febf4080e458816a22dcc8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:11Z), 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/TCAGD2269446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed931bae1eb9d737c2abf363f839be82ae3ab1752186c4cb8568a4f7872a818. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGD2269449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369de5d9dbf3f4d41384daf3a6bc7f21345ee94cd1c6eeaf1a626f56fe2eba7a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAGD2269452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa87ffb92778e6b3d0f4d03351b33046339c89e7e089d12c7746b5eea7f07fce. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAGD2269457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb778991619fc14f8881baa52c6970945e75460ecebed9561a4b90f6236c82841. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGD2269464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5e24a275de7487b1a0a3e957a2eb2dc70a116d39c10cea483cc9f63ce9cbcb. 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/QZK6Q2279716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350434df88cc100cee2cd687c3f4280d5134b4d66214c537d033dc899553643a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZES92432549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef31e2b916035104f07510f0715b04489bdfed9411b3915d3831738bfe05e66. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:46Z), 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/QZES92432555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236c2a941d297269bc0f047aa8cfdef162eaa55f45ff7cfcac9e4cff885937a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7M2535396.