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 0xce620bd3ad88aaec4a5ba71182cf3c023c519e75de5955c581a1fdb1df54f1bf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2510c9ff-366b-4786-bc13-9e9964e4d426.json and https://artists.proofprofile.net/proofs/artist/2510c9ff-366b-4786-bc13-9e9964e4d426.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 0x431278222624badd37241634a4f4ef25089921fabb8d29de7a0a53775a340bac. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWX2232532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7743ecd26e00d73c5dfd906de56a3fea2836ab69f8f79398743e384bf6825f97. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:19:15Z), 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/AUMEV2310167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5cf9938ef1b15bc4a5a18ae084128224c6bfc6d574eb60c17f277c42f9d4a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWZ2311049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c68c2f034b9c55d0101d7f5e710ebc7be8a200b8eca507f4e85c89cadac4e8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHO2331859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6614581f2fd9aadeecc3443bf4920c1cce4c6f5643f3e3b2eabc0df99b300b86. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIF2450811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d8debb0506b22b9111c933916681ff425ae31bed258ac2be7a088c6b3be757. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAIN2407387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa813202bd524a7c758b18a536f86b7adec1f21969b2d502372902ead5a535ec5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:45Z), 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/TCAIP2498958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa813202bd524a7c758b18a536f86b7adec1f21969b2d502372902ead5a535ec5. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAIP2498958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06521fbef9cc85a45696a55463a23851bd385370ed3e09acbcb9d274f790b6d5. 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/TCAIS2464394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6126c5e53977cdf8a644ca433b28c22009dc97565b9fea840f4a576c76aa3595. 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/TCAIY2424979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785e29b5e0761b9e883ef9bb88754304902c5d678bec2512f41694a4220dd45c. 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/TCAJA2466090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230e8298def647cdf2c452e371c5d3a57b3679ba25891c59f5f8c37d2823f39. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJC2442415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc6802fb11e6bb94eb8cadf958b63d7dde975cda96f7d5db8f994911358d64. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJE2535602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc6802fb11e6bb94eb8cadf958b63d7dde975cda96f7d5db8f994911358d64. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:41:08Z), 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/TCAJE2535602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda166c74ac374112f6b7fadd9da25fbaca09e52ebab4b8b7007fcf9a1ce7b17c. 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/TCAJF2598319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741da6b7d9b21be95be692615711609c6c7ad3596758f171fda32e65503658c8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:38:36Z), 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/TCAJK2516092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c16fbdfc8c135b23f9034049e2b98bedd1bbdf901f8b79e868263af86ddc6. 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/TCAHW2400462.