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 0xd667cfb6c6306c1c240f157c7fc33fe8c37e5d405658c446ef6f484192ab0494. 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/2519adce-5828-4c8e-a6fc-9def265884f7.json and https://artists.proofprofile.net/proofs/artist/2519adce-5828-4c8e-a6fc-9def265884f7.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 0xf55c53cd8df93635b8219612ffba6887af5156a1c55aa133577d04d46bcb4c64. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732431835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a7bccb53d65a6deed9c53e642e828cbb9c248cc965417f8df20bf773c82095. 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/HKG732431836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753fd3462cbfd2617a47af5749e44253f155f3ecfa2c4811dfcef00ab7319da7. 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/HKG732431770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a6ee9c94e4082d83b9821e02b8e628a8e3f3e40bae674e435603fae7069083. 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/HKG732431833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce554030ec79bd7733a0462984e427c4604ded1f4333b8358eeae51c0a8e154e. 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/HKG732428158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792b55aef378e7bf82dc818277eed01c5a56cf7d5b36c2bd523e6b978f869d97. 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/HKG731646645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c257d340d53c685bc2890cf14d96c6e5b8bd9b317b14cece0d34db0d36068b6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKG731646646.
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 0xfdd0565e1c339e147658b4d95527d15e62f70f39371c0e17ef3e60be14e38d50. 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/HKG732339037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8d8e5abc3a1accf40f3da047fea6f5c36e33f480dafa1ae3f9b2e5ff316c9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKG732339036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff3ad25def93d3f63c511b9b4cfeca00625c9d8385527b089ce5782fb0805e2. 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/HKG732325745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85422e6e7a44ad61d41e83d9aaf7a42ea1775c24df4bac7c5a95274ac70b3154. 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/HKI112111659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e11d28131adb137b328f53a50f2c2c307de0d13ce2775ac93e028816fc574. 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/HKI112111660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05f5082f930877bff8f8821b8557b761e8f46abd950965ab9c787574ab8787. 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/HKI112111661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4566d54ddcb0d0e5e2e85e588b00e0014e1e69bb2059ecf3297b57d111e3570. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/HKI112111662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e86817d2cae6fea97634e66eee13a29b50902c9b479328448b0c20ce2732ab0. 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/HKG731671370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f043b80bc58d7314049f323e81a05f6d6a6b8838fba02f7104e47e0b054fcc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWD252051449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d48f8e4b89485a3dcb6d93289c8b127cd3fe99416510f7c751f341fcbd79d7a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWD252051450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435452fb64ec5956cd6a16dee750cd34d9090c620fe82271c50ee345e8a7f2d5. 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/HKG732286759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1435e89844c82f6c05fbf3637f50c9e640bfcd1e28d361a8978f7ce7b3d020. 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/HKG732286760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48de92312d982103b944e3165add4923513c10829236f005f8b3009cb5bbe72c. 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/HKG732286761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17149c1b65e200cac0fe2e9752a4de3a4744e0c62f25a821f79b0eb6f52d1f4. 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/HKG732286762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd1c92e4e602478ad793886e549f8a1264968733eca67bc3458123fbe6d86b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732286763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06e7f63b118447eadf6bd1d0ba4b00e845d335c232d5b668a46e56474601913. 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/HKG732286764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6c347b7802bd8d65e8fb9bf057044d5f76a835dfbc15cea142ffdb4552001a. 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/HKE022216584.