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 0x9995fd2bde6bdc7bdef886f706c1c66df7163a2b91242dedd42ed5a4fa730a89. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0926cfee-60d8-4839-8ffa-36197eaa1437.json and https://artists.proofprofile.net/proofs/artist/0926cfee-60d8-4839-8ffa-36197eaa1437.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 0x2be4483d1873f37f6ad49a1e5e610695289dbac3b5b963c1f78b173eb4b6d90f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0M2490568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13314c0c3ab1f2c8ff9b178f9351b48d3226edc5768032e66a473482ea8f9990. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0M2490570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c34cf483a940e1efacbb7c34a1ff00f3a1a408ada1e38fb1107bae6541611db. 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/FR10S2146353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153481d35bbbb564d8f1cdf1b305163def63aa6740f3de7b2f1df7bcd2e5bce7. 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/FR10S2146306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2604940014349cb139a8981877e88cbac7cab23300d526785ca1daf1614805f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0M2476244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adb9905eb1ebac150af35eec60e1271d1049c03312d554a13e9366f1069fa65. 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/DGA0M2476252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460e6ccdcc65d56f72bef7a4d5b37b23f0c3648ca051ffd5c7abcedd59a6bc5. 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/DGA0M2476257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c1facf4d070886bc3cbc4ba028d047b4db674bdb26e6e4b7e500b41c3f38a. 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/DGA0M2465078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641d78afbfd5cbc15985c14df621e4da10a8e608febd5ee2e2a8cfd7d4f0e0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX282316297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf06b22c5d3ed9d15c5541b2e74a6041eba2a6f297f09a06e980567ec57e6da0. 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/FRX282316300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be759a9715ea6c468eba385ff677e670c7b4605c47cfd6f057eedf6851f4a3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX202371927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40f5031d38c61a6a27864ace8e4a0f7608c27d74ecb5d02fb00d5917eaf2b15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0M2475133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acda8440f8b71b31dfb90eb7f6b9cf22dfe005be322891f5426fd9d84e1c4fd. 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/DGA0M2476226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc7cc900f072319b5812f094f27cabaa90bed4f92debafafb33c718161eb67a. 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/DGA0H2360146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff345576d4861aa1b730bea681e654ff6d3882bc0865392ed05c7a56e79d1d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0H2336646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6464dd3012dbf368671c90c417bb409048b0a1589999efbcb2a299360bb9fbc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0H2303313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210e96d1fe3ba71ad81010cffb76b42dc3559a4851a0d1cc93cf485634c8704. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0H2348334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e01fe42e827dc79119078b1de3b809fac342ca6c99f015b7a855cf904bb6d5a. 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/DGA0H2310117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c5013bab26982ec6540d2d2a8176bda319a1fae95c07ea522000303511e32e. 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/DGA0H2302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c32eedd097d9110268691ed6f9f2409997033ee0aab7be3241dcc033264d2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:05:55Z), 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/DGA0H2383409.
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