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 0x4b397602a89d2ec25bca7c516aee086ededb580416bb2452ae5f0c5bf110fdac. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c30ab53-ce46-4fa7-88ff-c604a76ea194.json and https://artists.proofprofile.net/proofs/artist/2c30ab53-ce46-4fa7-88ff-c604a76ea194.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 0x06eb9c71f796ffd8ef38f9fe91cb8747e824a8466cd92e97e3bc5f81d62f44ab. 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/USV291473153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa08f8a8b7a707cc0d971baa07212a3b37d02a84b0f772feacc192221217c6a. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QM4TW1661570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa797dd7c12d62ca55c4f76a59d0fca0e6712c79cc74a4724655de368d70c3ad5. 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/QM4TW1661565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeed9fe4334b71ee05a12842e5e0bdf20d23a955f9be4eec39a3748f695c4a21. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6P41986042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f7b3a2b17bd355d8823b50f0092348612f90d472c73fae3fc2ad4a374b74fe. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM6P41990046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db144465c388df41c4751e5bfd76714c3ef173e49a239c4446015cfca0ca708. 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/QM6P41986126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ecdee645cc2041a4da16805b1be668d6eed3c38bbfa3b0f569d607eea0f4f. 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/QM6P41987791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f68e9020385148f71cccf9965c04e1ae4fc5610d8bd162ebda92b0942f2529. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TX2169423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8456188fbbc5579f531789a8019074d540e42d045f4b137162baf2ea9c2f7fad. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMDA62163548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b89e157d870c3f0657ea6c623a5814fb87723e7911cb2ec50802e3c4ef1706. 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/QZTVM2486037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37fd056c31002be90ad0719dbe476f1d88dd8018f32ef64de177d08e09d062c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:17Z), 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/QZTVM2489880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c85a6c66a52c2f561ee05c34af47d032d5ace576f82bf1052821d6d81ec6a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDD2594542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d7bcb59e506c7718ad22d0e26253a40e423d810535044d8beb78db24548e2e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ8A2517424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc2b4f66a0d34fec0188998cd165743204d439a16770f1c077b1aaa040f1e2. 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/US6R21372016.