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 0xb57698fcffcdeefb051368cdff70d07b666d85e7c5ca8b31f8bd599b28d351c7. 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/5c05378f-87d2-4c0f-9322-a9a33e6d2ceb.json and https://artists.proofprofile.net/proofs/artist/5c05378f-87d2-4c0f-9322-a9a33e6d2ceb.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 0xc999505e8ada3c050129574e44ee917333c7f0dc0d53ad46d1eff423b9382808. 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/FRX201937000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d4b8e4d0eab17ec7d18313975c29ba195981623cae9a801f2f48af81d2bd36. 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/FRX201937001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad354085099cdf932c9b3e5a47a10b7fdc15d5d53f2b9a2271348c4baedad14. 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/FRX201937002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040aab5482be00bc2f8f4579b1abd02f69e84ba845179e1f070d0e62b63bc110. 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/FRX201937011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09474af67777d0332ef0f1f80337c62d00cf95a590346e190a6e109be3c2c6d5. 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/FR10S1922470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39514e1dd918cee9efb531238f1fb5a49cb071ead16603422bdb42d7427c079c. 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/FR10S1922472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ade895174e76f1d678845e37552491f0ce64c760357a4300147944cc59927. 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/FR10S1922474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8b4329487db0dcb75746ed9891cad8e9d250cfd7062e9261bc4265fe7ad1c. 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/FR10S1922475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c6bd802d03cbc3fd65ae5b820f9daa5b131360d2385ad8df3eb59f7608b112. 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/FR10S1922477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd08e65173a34847549794791305f0cc06075c7a729a95491b1b5f79b5e7a2. 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/FR10S1922478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd197265f5fff39c5b1f4f80d13d768b2586ca9fe675c2002aa6c6d3a2d6287. 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/FR10S1922480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02914657584389b301de38950b47e893a57c0ceb47fb9000cebba9ae2d6f2f5. 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/FR10S1922481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5a4ac961b9db1910b4ad09f98bdc5497773e87c26532bdc4b2ee5b15cda0cb. 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/TCADN1841184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a26d58079270abb6d6f4f89d00ce4b8d9bb90468853e6219c5634e58a6de48. 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/TCADN1841207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7a68712ca8a64029b731fc7b5b37e6b0b4e196765e0f8df78ea843df7268fa. 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/QM9YJ1400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc466610015285ec32271518c1912b10033bd7409ab6aed29d2e69394c2213798. 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/QM9YJ1400433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d875f38071a31fe9242ffc42de120fe50b79fceafb898db8a12fe4b6f1178d8. 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/QM9YJ1400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf481c553e5e0914d5a75eb863de9776c56675640a7bcbc513ee9b3a5a3e376d. 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/QM9YJ1400436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6a2ed581e473f3ac1b730778acbb7a06bbb2aa020673008751d590d958cdda. 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/QM9YJ1400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb4d9f647fee201b9d02f1a453fd53cf5fd87e49a59b1db90ab768b6a0d1f1b. 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/QM9YJ1400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e2cc3d4accc9bf772a25b6d0830aeae12451a23d5b99aa564acb5ad227023. 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/TCACR1686886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adaf74816ba6f34ada5e33b826e213bd9c68072045c085b9e203c6ea0f8f2cf. 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/TCACR1686892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a5beadca6907909a49894002b1a421ce494af146141aec5c3b791dfda3a6c0. 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/TCACS1601466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c17d2e382953e1cc99043de4ca61ad1ad36428278d0553a8baa23cf051439b. 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/DGA052496306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e3281c0d38684b6f918a1417ce4cc97bf9e521c750668e43c2c016e4f8991. 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/FRX282091051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665a63c6f146a768c2b3991da734f309682af428326c84eb072568bc24e2fd1. 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/FRX282027980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc1301ad4ab9fd4d07caa8bde4bb81a85baa4ff2767a6c143dd0484827142c2. 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/FR2X41912515.