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 0x0a8f3438a3844e639ef90e785038ab77b5cb6f456a77b2b2dd2f3ebf9a6ab6c2. 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/2ba27a69-a058-4f20-ae53-4ae01defbeac.json and https://artists.proofprofile.net/proofs/artist/2ba27a69-a058-4f20-ae53-4ae01defbeac.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 0x0a01b8bb94b9665c5c042c308d0060e60eebd6688306396908f0d0de8bc47e5e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USL4Q0866076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e77aa7f31f7c3a1c8e70e21bf5ddd5811260551d23a1cc40427387c7e0f566. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q0866080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2342bab5483eaf5608d279189c3a8824d06e4a7b9db6a3a755792fcadc9b9d1e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM81371181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d53000e3ff24f9ad2725f91efa3a63de309d7c2dc467a3fe42be6df9ff4e17. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM81371185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624d0cba0ce78139949f819f3f346b4699e97a502089982dea83ea97ebd3340e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM81371188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9572b0ff385e625bc2814cbbc3b6316439a6d6597678c2219510c7190e497b5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDY41667347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb53e777389da8c0de11b06e8e6d23e64f70d1456546144d571d063eac420e4. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USCGH2019751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5cac158327e8d0f1c125aad1313e8745f939f60374d3d26027553fabb8abda. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USCGH2019754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a70a9d6b7eb71e4f94d9ea9750541474b9a33ec8fdf89dbd1876a9d8f0df82. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM82105130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa594185fec1b487bf88f07e21d2de35d727ced7b6737350090a023bb99b8cd7b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USHM82105133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9181069c3a2ef41e28aca0a267a015473c1fa327ebdd0e580f59916a5199fe2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USL4R2250770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a38984d1c16217f34bd07062885341be0406f3b0e86b66fc9f421b9269bd3d7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH2381010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11acbeeb84ac761984702a983d8b62ada5b71df5fcd812672b8aa0de67d4704. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:59:46Z), 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/USCGH2418888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b83dc29a0f22e4d3b4ae2b19ebab9b997d9bdf67a6f4c550ab24e2b8c39735. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:52Z), 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/USCGH2418892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0226f5bcd9350db33590dd416262063637cefb95d249f48e8dafe7812d1f554a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USY242492842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f79881701ea3361a7481d541e6b1f0b5ffc3409f3b7f45bc1f4088722b4508. 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/GBPS81500695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1ec22bdc8a1f68b0de2dff5e1279511511e0e560ec85f73b73cb99374d091. 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/GBPS81500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08926c223de8191168d750127113ad7ff41a1a4dad7908614bb8717b7c3bded3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBPS81500692.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch