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 0xd24bf71aa5568e1ef7f773d979e38efb5edfd1e055d0bcb30a311b2c1c441679. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c97e0354-0178-4f94-aee0-d05e1e338fd5.json and https://artists.proofprofile.net/proofs/artist/c97e0354-0178-4f94-aee0-d05e1e338fd5.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 0x874f4a5b5e68633be5820ff4ad4c62498944813d18c464836294fc08f2fa47f2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5BU2105981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb1fba8e8fbd765fc0a8160475a9a60f3d2bafb90b2d10044cb78bac1d0a27. 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/QZFYY2128048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc60c38bfda4dfa9a83ee747208f66caff03c055e28ee1fddd6aa54ad47102. 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/QZES52195637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88635bb04d6cbf5748797d6c6be8830e9b2efb3750acae3333f27afba0ddf7d0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZDA82170210.
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 0xf63d86fa460c99245be9030824c45acac6390a3445b9152b5be2891a0b62eb72. 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/FR2X42262770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6bc68f48d781f8f0e1474a80101a7e36d53bd7320a908a3edfabe5845e226. 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/SE6XX2134063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1646083619570eea0fa72a310610a1fc109d27f553a409d5e7bb0e3d6ccf16. 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/FR10S2242478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48a3a92ca41813bf1f34cca4c1ad003bc9d2ddb7e068227adf43a0090cffe4c. 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/QZHZ62242464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afc979a30736f3310ded4e8be2b30a1d69b66c39af4203e0f69ebf4eafaf3b4. 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/QZGLS2271015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976d1cabfd5fc10f68c7c725404aa57bb132af5e53fa77c8de122f4357107c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:14:11Z), 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/QZHZ52281673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38271fd286d9967145095e71d4b34ac300166544443af06729f99912779b0947. 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/QZHZ62242471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd049526773da2da2cd4c8b6ee3d67d4fe61c9755a0ad127ac7bcc61bde752293. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHZ62242468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f9452e632d2bbb5b26864ff30dce26d461b6186d0509ba270b4788cbb7129. 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/ES71G2309970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b3ae1749ef720fcf421a34fe8859552996b913084bbf5054817191440b593d. 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/ES71G2301292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1b6f38f6b3986ae2b9f7274199be63e6209534daf34bccdba3c20f06c002a. 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/BK4DA2212946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd8048005d9f8bc4807f9e16b6cc99ed5da60621e224818ecbaf806a984817. 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/ES71G2240807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abb5c75e2c9714a1107c7fa9d086ac1a3f61737d3fe1ae8b277468277b68642. 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/QM6N22218948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36524094d67064819c6b0da2d83943bac6388bb2e320cc46466bbbb73a6d0ee2. 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/ES75E2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7e969089de275fb4f1fd3355597451526284928ba8f2a3917a47399d2dd776. 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/SE62M2136084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c598cc4e794834fe39631f7b23744790a3bf9d906b4068a7b53e1e4e72e9325. 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/SE6I32151126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8c6ad2ed6abb5a24d9d7d040689e93ea399a5144b176d0de9fe0fa1d6016de. 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/SE5BU2106034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5642c51c1b2248d0d284706f5febf196372818e31b0b8c20d19e98c6fb7a1551. 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/ESA011769552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a677856e95a61ba0cc1be4f63c11be5d09e6e38deeccc77fd879566733e90f. 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/SE5752061801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c631ce91e02bca70296ffa54739677a22fc525ed1951d91817e2d02dacbd579. 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/ES75E2202882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b5b6071a92bad1dd4293a6d7a803d0daf3759caf05949fb7799ba778d3008f. 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/ES75E2201647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657b5e439fe4e5332ee3293d980a634757b3a5d03c910ea6eed88946c43374d. 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/ES75E2202887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6cdfe7320c0a099b7e7b68f6127b6cc6e7227f118a8c0f855d31e8902684e3. 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/ESA012205430.