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 0x79b6c0155c644a217f1bf45c8e6a0bcf92557f228e38d3ac990c67dbc48ed614. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/becf0848-9e8d-44bc-9388-0988801fb5bf.json and https://artists.proofprofile.net/proofs/artist/becf0848-9e8d-44bc-9388-0988801fb5bf.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 0x12fdaa5981ba11241f5168a05f5c03ceed9c6eff400217e16cd340c92b14fcbc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWC011201551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb165e1bd29a7d21ddd9fa9f756b0138a01620e811696e1cf55f4fda8aed36833. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWC011000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3b67f996c158406c04a951b474f4b2a6acb3739cbe1f9aa495f6bbfafc8213. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWC011000791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db226c8d47a4bf19e8cf38d265760d1bec8e1c3226aa5f34059d5ceef362bce. 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/TWC011205661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d9f5c7b12f5614de3c49fe8d00c5886333d9811a7066e9164f187ffaf9bcc. 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/TWC011205291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ea909c8b9c21092440825088c687b76fb497841cf6fceaddcab8f8793e3aa6. 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/TWC011200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ad459199d7d0a7581e7b650983807d7a2af44f332051c06804f7cedb56ab7. 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/TWFQ72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ee888cd9dd3ce09bf63123800465aa4dc779b6c0cca6ffa8dbc32f2866594a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWFQ71900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db226c8d47a4bf19e8cf38d265760d1bec8e1c3226aa5f34059d5ceef362bce. 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/TWC011205661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fabc72d2480c2e13edf70897a476519081d7ccf71655fcd4431cb13210a1e95. 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/TWC011205711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c3bef2a72094051bc755eeb413880367ed5ab5d918357b19eba4ffa77f9655. 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/TWW671509001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5520ad6e0bc8c7edefb1a79b81f0a9a247be1d59968be61ac3dbf554f9c42744. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWW671509008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9520125a9c47370fd2c83f69e1a4a184bb49751f372a34342374f89aacf06ff. 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/TWW671509015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eff3bbe2d51063664f318e6e21b40cc66a136433eb1a531cb89608465c89d0. 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/TWW671509017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425cac630b383f50b2f6204b5a4f09ee6dddb35c31797de2864da9614e6a71bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWFQ72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e008ac1165fd500e682e76a7605eaa0e03b9b2795a70195b1341e47ed02adf0. 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/TWFQ72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4237830804eb6d0b42afdaea913ddf6ad40422c65fce68a22f76a9d35815d1c. 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/TWFQ72100008.