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 0xa0a40301a4772c917318b3ebab1b5224ef19609de3e1ad74d3e44290c6d8e2a6. 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/7ee2209b-1a28-4ea6-94b4-2173d452facd.json and https://artists.proofprofile.net/proofs/artist/7ee2209b-1a28-4ea6-94b4-2173d452facd.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 0xd07eee4cb2bbba8725c2318d6cbe999e6e6caadeb53d74cfb1ace5412f8d955c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BC1BI2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e392acb3743f3829198b31e36511eda6665e928b5ef85d05f7eb9e8c2d555c7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/BC1BI2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e36d52e7b01176f48a79551d5e036e3eeea31be602178579182835452df2e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BC1BI2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2e0428417fa49ac11c33ae22a2f7d556415383d8b10e524ef9c511d0ae48a2. 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/BC1BI2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e86457186532af106a050ff0997b3039c66f63622a11e35371a6aad66954b27. 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/BC1BI2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc0d76db25b094915127d896281fb427b5a98a1629f81adf8d5837deeb93f9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BC1BI2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fe669e179efa5029e1bc8c5b3ba3de0684107d694b401a9e45fed9dce8c1c8. 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/BC1BI2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a9449e11e1a9bb0013f359659665c4956028a871bfb96c0fe14bf35eae410. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BC1BI2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9f52c47e4c7a6365551d1ea6f9ea2e70920e02cc546f53b5b2ba062d367e43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6baff7d8106d4e1baa0461cd6639a9a95255222664e195565d8c63699276f4b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRRGE2300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb064734e4e6b499865a42736ed9e0653b0ef77dcc99bf06a53965e233a0d74. 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/BRRGE2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878c9a7bdd85edcd8e1cfab1e9c738ffc597d5dde7d59327364ce307e684a4ff. 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/BRRGE2401252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68295e61e662cf4eba320b418a7e947bcd16461c5905c99671f2a179af4e7ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM112100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f00ea31517a6654d5ef495470cc8016ae2765d5449a6b3c0f0bd9ef6728153a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRUK01800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9530d2f55ca8fe053a443f7f4574cd87ea82f4e0958eb14643ec81797caee36c. 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/BRRGE1905423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6ac01a1a017b68b6e1c7902e3f589b4b300e77727dc6fb807743332a297da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRRGE1905426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2331b779fb66694b1aa2c8c6c16cfe17d8f7f5ce3631219f7064c542020a7bb3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRUM72400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372c2b86afe229ec26159954d3efd4e24b0c506ed962ea744b88145e9df812f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRUM72401929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2331b779fb66694b1aa2c8c6c16cfe17d8f7f5ce3631219f7064c542020a7bb3. 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/BRUM72400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f11f73ba4834ca515c5662cf66ef4572a97130a53b7c823fac45bbe7a7ef1. 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/BXPC11800003.