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 0x64f1b6f90f27002fdd50bc35ce80f93e6b2cccea3d6f592e8bc7c1ae85ecb880. 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/848069a8-3cea-4c54-b113-cff07237d5a9.json and https://artists.proofprofile.net/proofs/artist/848069a8-3cea-4c54-b113-cff07237d5a9.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 0x229fb15dbd3dd2817aa163d40521f49417d40eeedf46a9f6ed1963164e4cfba1. 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/UKU932231178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb2682791b81e61aace9fb344fe8a375bf5b214d37d053ff0c246cd739c2c9d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKU932230128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a60929e8d22128a587426da89f5fe87c7f8ccaff3674a67334c9f73ab5da22. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKU932400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75ab7f525422bb2592f8c942a5569ac87ae19b4e903f360365720f5a86c5575. 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/UKU932400122.
Don't Let Me Be Misunderstood - All-You-Can-Play Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92a3cd53f6d2efb2a890f558a088a931170bcd0552c568348c5ed5c6559068. 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/UKU932300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cabc23b9c6469a9d7fd60b40234b6c0d2993b48382119b7c93ba4bf0e65efc3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKACT2373388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8d6f1863950bbf811c3232c53361e5b77603b7332c74a2c225b0ba0bd5e944. 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/UKACT2372570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cd7fdc6ea7065730fc963a3ae136607984f99506ce3cd045216c18885d90eb. 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/UKACT2371933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42997377ae5851938559b32c3c0ea074cb805ceffd32e1e611f223c9cd4bc9c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKACT2371919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef66fa409efb7f2a97ba89bd6198f2e39fbadb5b7debd34649448ac1eaf10f85. 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/UKACT2371308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0fb9e44f0ca255b8f9849430d4d3cb6f548e76287d0539d2a9cb8d02dd5b60. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKACT2371098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e19ec674d6df6e5e8e59baf7bb362604ecc9ce02da9ea71d84a15c52a354b3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKACT2370445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56969de7b32319cc47b2256d9e2375ced7ae86e5325e0308f70c84f3fe66d8a. 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/UKACT2370293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d469befac7c131e5182e17130b7d01e4b96dc5c3584a444755a576b6916f0fc. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/UKU932502729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afc0da4e0dcdeb2551b28fd2b94d54c5cb959a1650df84cbd19e8dd0bf71e10. 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/UKU932502728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7e2dffc2c0ef6ae2145169e91a47640d5a12467c1f1ac63f48e6b403694628. 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/UKU932502727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ae88b6192256e06be23bd3840d0136b67ee7fba30b76d631972633d7deab4. 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/UKU932502526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4276ceea49b9f4d64317470db07f17c78de0882618256d721261820e93287613. 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/UKU932502524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a4c29732f72dfc5bd4b476a953e7d2dc82e30a514f0f5b0857073d9e4885dc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UKU932402083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b99915bee6590fb791f66819b61798106d1e321c422f6b5634e381bdd90a9a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKU932402082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2274a54c113cd538931c467e155acf936a0ff4e5c1324ecffd8958a0a79faa5. 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/UKU932402081.
Sometimes You Win, Sometimes You Lose - Disco Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9502ca4ed36bb046e5efb1f9f3f5fbebc0674f448668f93dc14fd2e4316c56. 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/UKU932401258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58de32d3ba9973f4d134c6df2182b30e970949fe998ce714fd71c51c9bc1ab81. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKU932400772.