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 0xc0a5dd060ec0a24bce1466af3334dfdbae30fb5e7d98021cf5af414044342738. 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/453084da-9bfb-4b8e-9c2c-6e6695fd8ada.json and https://artists.proofprofile.net/proofs/artist/453084da-9bfb-4b8e-9c2c-6e6695fd8ada.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 0x36a49a062a9367cad760bc4973fb8675c4d4dfe77f7ffccde6bdd6250dfa7947. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKEWB1600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabcb0324e0bc88f5f306fb992952aaaf8a53eeb0a17278effdd3c668eaeb125. 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/UKEWB1600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff267dff9bb99b39f2eddd2198902d9a60363a0ce771423cce8babb092b93f8. 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/UKEWB1600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa2f60e7b9815a1ebcf1148d4d7c6185f479c4d611aa14a9a4ff8b5fb5939d. 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/UKEWB1600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c11ea8c03cf0a10859e9857a27cdfd470ee87c72f7b12334f34d25303d7f722. 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/UKEWB1600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053951621e1de2348ed3fb8110d7b60ba0a76571af5e3fbd714042be76be983. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKEWB1600396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828dc42625e6bb0eac23844e0e6f03b78f898daf96cef5b92afb5342121202e4. 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/UKACT2420271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9931406d483207ca526241b6e749f6f8dab40a7475b6a8086738303bd9e401b0. 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/UKEWB1600374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fabc228a2e198a2d8881a4e5b8ac4d9fb5a8676d9eb97c4d8ee661d76ca975. 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/UKEWB1600375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fabc228a2e198a2d8881a4e5b8ac4d9fb5a8676d9eb97c4d8ee661d76ca975. 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/UKEWB1600375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb6a798743ac4216fe70058631b572d09bfb6ed66a5197d061263ee97bb5d1c. 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/UKEWB1600341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2101559d06249e6182de6c3e71ee4b9214c0ad0fa9587d28e2ecdedd67a22fdf. 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/GBLV62301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3c655c4ea2097107af9c37c57db4e60f1acf7aa3d2adf5f260216d9b2e5dc2. 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/UKEWB1600356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f6385c18f24683fb733249529695b00540c0b37e104f52b91d6f61b2cc0d49. 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/UKEWB1600337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d13d98e947b91bcaf27f8060581b5c4449b76840149ef4a1c3e35e801cb63. 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/FRIDO2310202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3106960cd459eaa48bfbd6ad27416c76f651c4889976cf49a88b286218c1c042. 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/UKEWB1600339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf74b60e03e298b6df60f23a2fc9e4de811c4a47adcd089be8f4d3c47471b423. 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/UKEWB1600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1145183727c053dd050c584105c0e9e9e5f2f5050a7a3f813134f0f554f2ce1. 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/UKEWB1600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c969fe73c030707541562f7d3570373428fcb11209e2766b91bf103ce24d945. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:24Z), 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/UKEWB1600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd028f487d847f6956e7611c08eb8c27761fe5877885042563facdd209a872d86. 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/UKEWB1600246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e145550757c83877d46bb37da43b733607e774234d41451fa75b1c4b152a2a. 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/GBPWR2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e298324a46c42dbbef30b7e96173aad7eb7f06ca1a88e824b1deed9fe0191ba. 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/UKEWB1600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba53a48ae0613d2b30c87701488c107dfdb182d6e19ff8f81d3fccc932b346f. 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/UKEWB1600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e527b38df60ca6765824aa17d499b183bc674a100fa028c5592d28fc0c8462e. 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/UKEWB1600190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef35513c19fb85a6c5c8e00d4cb598c39434833b68d05a727dca809eacaa37. 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/UKEWB1600191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd973c9eb4998d91bb75c4aef76b213a6b63bfa8d6cc749807c705b18393b1c. 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/UKEWB1600192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f321c6a1637dcf19b545d7f9dd1647a15bb70580b3625a223da74da60e470a. 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/UKEWB1600171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260ef00952e2fab417522997ff819002690fd9bbdbcf91e004b7746d303009f4. 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/FRIDO2011392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aacfdf4ea636eb8aa3fc3f005fdf1169c6726f3ad1c998db53936637d2a7c7b. 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/UKEWB1600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a23a0037573fd5f45cc11f7960b79ccf1ba1a85acaaedb55df2c4e337ab22c1. 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/UKEWB1600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bdaa3fbdf2d20dc818aa78743f32b302078d238d1f93d728a7e0dfd0f6a004. 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/UKEWB1600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623c16f5f17daa2b1a5bf9122c24564dd998e010e76ddc1975028aab05e47cc8. 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/CA5KR2250596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f904f909f6ca35b89a8e69b629e4a2caf4af9df18937c730c07761e5bb9e46. 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/UKEWB1600372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb6a798743ac4216fe70058631b572d09bfb6ed66a5197d061263ee97bb5d1c. 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/UKEWB1600341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d179d16976b7af75b979d31b9b12361a3ff1ab7dfa26d1bbe40968ecc9cde. 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/UKEWB1600216.