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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31f17eb2b975afff2d6d105b2f6e5907357bfa3919c913f94e8dafae00f7d7. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1940737b-efc4-48ed-9e22-f61e31f7a596.json and https://artists.proofprofile.net/proofs/artist/1940737b-efc4-48ed-9e22-f61e31f7a596.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a34658a44dc0445ce4e768f68bc2158e2d52d4b1bab1ce8a87f13c4e1f325a0. 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/MYRQ11600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c0d09c9840be6bcabd4b2a64f9e66499f018e0debd9af36ac31ea979e4bff8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/MYRQ11600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b2b3fe58a2f53b97a1d903d5b0491f68ce9e9375e7d4cb6b9460aad61d3243. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/MYRQ11600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5959ba03537e9a73fe0ce73a384d6c1df7fa08cc7dd91a20175896c13cafacc. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/MYRQ11600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf041832c4b75e22df1a23fd5ff5e869c35484f1aa246b2a1bf053f2c7b09021. 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/TWBW51600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a88dcd3090bc3ac19631460a54830417e6bd08fec81c3c8d3a4df78c27ed9a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWBW51600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8c7609391534a502b84c346062353a09b53cbc04b0e9e06640a8f86dc3b4a. 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/TWBW51600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf780a5c153cd503bc912c5ec10d86b7aa914c735870ac210efb9055f1826ca7. 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/MYRQ11600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9610dedb74f9943df764c0a21379e0837b6c6a7f095f89661d0c3d49429dc05e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MYRQ11600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf332177ed2c2f509d8d711c27d90f51052289ef49d06c04e111e53553afd64a7. 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/MYRQ11600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6d0592e525127e0415073f19204199dd7d0576e0c9f46d95f531dfd49797e. 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/MYRQ11600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e2f0d00155a368d5c9134f2fc0316802000cb61155af9910e76a190bec9a95. 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/SGA522200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae0fd8a631a2067ec147606e93180e8967db0ebfd03b1b413bac7339e584ba. 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/MYRQ11600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef77022011348698db9ad363a63a6b5cd4553e7886d7030c8b1504db479ed695. 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/MYDG11800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1406be61375b2471181568e4288140bad6099f4ccfb34afcc6d9ad2418cc9f. 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/USHM81989698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc624e96a54ee68a1fd0efbb4062cdaf998ebfdacb6b1e8e01ca8713e912d90d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TWBW51800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589f9d6b4e571ebcdf5b54074f6641271f677b49c4f4163aae1e1c4c9f52d61. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWBW51800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded179fa2881d03aabe679b78d31a4179abecfeecac5a382fc9c2b05e6fef724. 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/MYSN12500050.